From 4bfd864f10b68b71482b35c818559068ef8d5797 Mon Sep 17 00:00:00 2001
From: Thomas Voss <mail@thomasvoss.com>
Date: Wed, 27 Nov 2024 20:54:24 +0100
Subject: doc: Add RFC documents

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+Internet Architecture Board (IAB)                            N. Brownlee
+Request for Comments: 7996                    The University of Auckland
+Category: Informational                                    December 2016
+ISSN: 2070-1721
+
+
+                   SVG Drawings for RFCs: SVG 1.2 RFC
+
+Abstract
+
+   This document specifies SVG 1.2 RFC -- an SVG profile for use in
+   diagrams that may appear in RFCs -- and considers some of the issues
+   concerning the creation and use of such diagrams.
+
+Status of This Memo
+
+   This document is not an Internet Standards Track specification; it is
+   published for informational purposes.
+
+   This document is a product of the Internet Architecture Board (IAB)
+   and represents information that the IAB has deemed valuable to
+   provide for permanent record.  It represents the consensus of the
+   Internet Architecture Board (IAB).  Documents approved for
+   publication by the IAB are not a candidate for any level of Internet
+   Standard; see Section 2 of RFC 7841.
+
+   Information about the current status of this document, any errata,
+   and how to provide feedback on it may be obtained at
+   http://www.rfc-editor.org/info/rfc7996.
+
+Copyright Notice
+
+   Copyright (c) 2016 IETF Trust and the persons identified as the
+   document authors.  All rights reserved.
+
+   This document is subject to BCP 78 and the IETF Trust's Legal
+   Provisions Relating to IETF Documents
+   (http://trustee.ietf.org/license-info) in effect on the date of
+   publication of this document.  Please review these documents
+   carefully, as they describe your rights and restrictions with respect
+   to this document.
+
+
+
+
+
+
+
+
+
+
+Brownlee                      Informational                     [Page 1]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+Table of Contents
+
+   1. Introduction ....................................................2
+   2. SVG 1.2 RFC: An SVG Profile for RFCs ............................3
+      2.1. Elements, Properties, and Attributes Allowed in
+           SVG 1.2 RFC ................................................4
+   3. How to Create SVG Drawings ......................................7
+   4. Accessibility Considerations ....................................7
+   5. Examples of Diagrams Common in RFCs .............................8
+      5.1. Packet Layout Diagrams .....................................8
+      5.2. Sequence Diagrams (1) ......................................8
+      5.3. Sequence Diagrams (2) ......................................8
+   6. Security Considerations .........................................8
+   7. References ......................................................9
+      7.1. Normative References .......................................9
+      7.2. Informative References .....................................9
+   Appendix A. RELAX NG Compact (RNC) Schema for SVG 1.2 RFC .........11
+   IAB Members at the Time of Approval ...............................53
+   Acknowledgements ..................................................53
+   Author's Address ..................................................53
+
+1.  Introduction
+
+   Over the last few years, the RFC Editor has worked with the Internet
+   community to develop specifications for changes in the format of
+   RFCs.  An outline of the resulting specifications was published as
+   [RFC6949] in May 2013.  Since then, a Design Team has been working
+   with the RFC Editor to flesh out those specifications.  One aspect of
+   the changes is to allow line drawings in RFCs; [RFC6949] says
+
+      Graphics may include ASCII art and a more complex form to be
+      defined, such as SVG line art [SVG].  Color and grayscale will not
+      be accepted.  RFCs must correctly display in monochromatic black-
+      and-white to allow for monochrome displays, black-and-white
+      printing, and support for visual disabilities.
+
+   SVG (Scalable Vector Graphics) has been developed by W3C, the World
+   Wide Web Consortium; its current standard is SVG 1.1 Full
+   [W3C.REC-SVG11-20110816].  This document defines SVG 1.2 RFC, an SVG
+   profile (i.e., a subset of SVG) that is suitable for RFC line
+   drawings.
+
+   Note that in RFCs, the text provides normative descriptions of
+   protocols, systems, etc.  Diagrams may be used to help explain
+   concepts more clearly, but they provide supporting details and should
+   not be considered to be complete specifications in themselves.
+
+
+
+
+
+Brownlee                      Informational                     [Page 2]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+   The details (particularly any vocabularies) described in this
+   document are expected to change based on experience gained in
+   implementing the new publication toolsets.  Revised documents will be
+   published capturing those changes as the toolsets are completed.
+   Other implementers must not expect those changes to remain backwards-
+   compatible with the details described in this document.
+
+2.  SVG 1.2 RFC: An SVG Profile for RFCs
+
+   As a starting point for SVG 1.2 RFC, the Design Team decided to use
+   SVG Tiny 1.2 (also referred to as "SVG 1.2 Tiny")
+   [W3C.REC-SVGTiny12-20081222].  SVG 1.2 Tiny is an SVG subset intended
+   to be implemented on small, mobile devices such as cell phones and
+   smartphones.  That should allow RFCs to be rendered well on such
+   devices, especially those that have small screens.  However, RFCs are
+   self-contained documents that do not change once they are published.
+   The use of SVG drawings in RFCs is intended to allow authors to
+   create drawings that are simple to produce and are easier to
+   understand than our traditional "ASCII art" ones.  In short, we are
+   also trying to improve access to the content in RFCs, so SVG drawings
+   need to be kept as simple as possible.
+
+   Appendix A (below) provides a complete RELAX NG Compact (RNC) schema
+   [RNG-HOME] for SVG 1.2 RFC.  It is derived from the SVG 1.2 schema,
+   and is the formal definition of SVG 1.2 RFC.  The remainder of this
+   section gives a simplified -- i.e., easier to read and understand --
+   overview of SVG 1.2 RFC.
+
+   SVG can provide a complete User Interface, but within RFCs, all we
+   need are simple diagrams that do not change once the RFC is
+   published.  Therefore, SVG 1.2 RFC does not allow anything from the
+   following sections in SVG Tiny 1.2 [W3C.REC-SVGTiny12-20081222]:
+
+   12  Multimedia
+   13  Interactivity
+   15  Scripting
+   16  Animation
+   18  Metadata
+   19  Extensibility
+
+   Note that SVG Tiny 1.2 elements may have many properties or
+   attributes that are needed to support aspects of the above sections.
+   Those are not allowed in SVG 1.2 RFC.
+
+
+
+
+
+
+
+
+Brownlee                      Informational                     [Page 3]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+   We now consider these other sections in SVG Tiny 1.2
+   [W3C.REC-SVGTiny12-20081222]:
+
+    9 Basic Shapes
+
+   10 Text
+        Everything in this section is allowed in SVG 1.2 RFC.
+
+   11 Painting: Filling, Stroking, Colors and Paint Servers
+        Anything relating to 'color' is not allowed in SVG 1.2 RFC;
+        everything else is allowed.  This is a requirement documented in
+        [RFC6949].
+
+   14 Linking
+        SVG Tiny 1.2 allows Internationalized Resource Identifiers
+        (IRIs) in references.  In SVG 1.2 RFC, such links must be ASCII
+        only.  That should not cause problems, since one can just use
+        the URI form of any IRI.  Authors should try to use links only
+        to URIs that are long-term stable.
+
+   17 Fonts
+        SVG 1.2 RFC only allows 'serif', 'sans-serif', and 'monospace'
+        generic font families from the WebFonts facility, described in
+        Section 15 ("Fonts") of the W3C Cascading Style Sheets (CSS) 2.1
+        document [W3C.REC-CSS2-20110607].  In particular, the SVG 'font'
+        element is not allowed.
+
+2.1.  Elements, Properties, and Attributes Allowed in SVG 1.2 RFC
+
+   This section discusses elements, properties, and attributes selected
+   for SVG 1.2 RFC from [W3C.REC-SVGTiny12-20081222].
+
+   In the list below, elements and properties are listed on the
+   left, and their allowed values are given in parentheses on the
+   right.
+
+   <color> is the list of allowed colors, a black-and-white
+           subset of the SVG color names.
+
+   <style> is a set of CSS attributes that are commonly used (by SVG
+           drawing applications).  They are not part of SVG Tiny 1.2
+           but are included here for compatibility.  Note that
+
+           - There is no guarantee that any renderer will implement
+             all the CSS attributes a drawing application may use.
+
+           - Authors will need to consider the compatibility of their
+             drawings with rendering devices.
+
+
+
+Brownlee                      Informational                     [Page 4]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+   Elements:
+
+     svg              (version=1.2, baseProfile=tiny, width, viewBox,
+                       preserveAspectRatio, snapshotTime, height,
+                       id, role)
+     g                (label, class, id, role, fill, <style>, transform)
+     defs             (id, role, fill)
+     title            (id, role)
+     desc             (id, role)
+     a                (id, role, fill, transform)
+     use              (x, y, href, xlink:href, id, role,
+                       fill, transform)
+
+     rect             (x, y, width, height, rx, ry, stroke-miterlimit,
+                       id, role, fill, <style>, transform)
+     circle           (cx, cy, r, id, role, fill, <style>, transform)
+     ellipse          (cx, cy, rx, ry, id, role,
+                       fill, <style>, transform)
+     line             (x1, y1, x2, y2, id, role, fill, transform)
+     polyline         (points, id, role, fill, transform)
+     polygon          (points, id, role, fill, <style>, transform)
+     text             (x, y, rotate, space, id, role, fill, <style>,
+                       transform)
+     tspan            (x, y, id, role, fill)
+     textArea         (x, y, width, height, auto, id, role, fill,
+                       transform)
+     tbreak           (id, role)
+
+     solidColor       (id, role, fill)
+     linearGradient   (gradientUnits, x1, y1, x2, y2, id, role, fill)
+     radialGradient   (gradientUnits, cx, cy, r, id, role, fill)
+     stop             (id, role, fill)
+     path             (d, pathLength, stroke-miterlimit,
+                       id, role, fill, <style>, transform)
+
+   Properties: (most allow "inherit" as a value)
+
+     <style>          (font-family, font-weight, font-style,
+                       font-variant, direction, unicode-bidi,
+                       text-anchor, fill, fill-rule)
+
+     <color>          (black, white, #000000, #ffffff, #FFFFFF)
+
+     stroke           (<color>, none, currentColor)
+     stroke-width
+     stroke-linecap   (butt, round, square)
+     stroke-linejoin  (miter, round, bevel)
+     stroke-miterlimit
+
+
+
+Brownlee                      Informational                     [Page 5]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+     stroke-dasharray
+     stroke-dashoffset
+     stroke-opacity
+     vector-effect    (non-scaling-stroke, none)
+     viewport-fill    (none, currentColor)
+     viewport-fill-opacity
+
+     display          (inline, block, list-item, run-in, compact,
+                       marker, table, inline-table, table-row-group,
+                       table-header-group, table-footer-group,
+                       table-row, table-column-group,
+                       table-column, table-cell, table-caption,
+                       none)
+     visibility       (visible, hidden, collapse)
+     color-rendering  (auto, optimizeSpeed, optimizeQuality)
+     shape-rendering  (auto, optimizeSpeed, crispEdges,
+                       geometricPrecision)
+     text-rendering   (auto, optimizeSpeed, optimizeLegibility,
+                       geometricPrecision)
+     buffered-rendering  (auto, dynamic, static)
+
+     opacity
+     solid-opacity
+     solid-color    (currentColor, <color>)
+     color          (currentColor, <color>)
+     stop-color     (currentColor, <color>)
+     stop-opacity
+
+     line-increment (auto)
+     text-align     (start, end, center)
+     display-align  (auto, before, center, after)
+
+     font-size
+     font-family    (serif, sans-serif, monospace)
+     font-weight    (normal, bold, bolder, lighter)
+     font-style     (normal, italic, oblique)
+     font-variant   (normal, small-caps)
+     direction      (ltr, rtl)
+     unicode-bidi   (normal, embed, bidi-override)
+     text-anchor    (start, middle, end)
+     fill           (none, <color>)
+     fill-rule      (nonzero, evenodd)
+     fill-opacity
+
+
+
+
+
+
+
+
+Brownlee                      Informational                     [Page 6]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+3.  How to Create SVG Drawings
+
+   Many drawing packages can be used to create SVG drawings -- for
+   example, Open Source packages Inkscape and Dia.  Be aware that such
+   packages may use SVG elements or attributes that are not allowed in
+   SVG 1.2 RFC.
+
+   o  For example, the 'marker' attribute is often used to place symbols
+      such as arrowheads on lines, but 'marker' is not allowed in
+      SVG 1.2 Tiny or SVG 1.2 RFC.  In such cases, one has to draw the
+      arrowhead in another, simpler way.
+
+   o  SVG clip paths are used to define a shape; objects outside that
+      shape become invisible.  The 'clipPath' element is not allowed in
+      SVG 1.2 Tiny or SVG 1.2 RFC.
+
+   Diagrams produced with these packages may contain elements, their
+   attributes or properties, or values of attributes or properties that
+   are not allowed in SVG 1.2 RFC.  We will need to provide a tool to
+   either (1) strip out anything that is not allowed in SVG 1.2 RFC or
+   (2) replace disallowed values (e.g., replace 'Sans' with 'sans-serif'
+   as an allowed value for 'font-family').  Experience with a simple
+   test version of a tool for this has shown that such deletion and
+   replacement can be effective for making SVG files from drawing
+   packages conform to SVG 1.2 RFC, without visibly changing the
+   diagrams they produce.
+
+   The tool described above can also be used by authors simply to check
+   that their diagrams conform to SVG 1.2 RFC.  To help with this, if
+   visible changes do occur, the tool should produce a list of
+   non-allowed keywords and the context in which they were found.
+
+   To include a diagram in an RFC, the xml2rfc (v3) tool will need to
+   provide a way to include SVG drawings in Internet-Drafts, as
+   described in Section 2.5 of [RFC7991].
+
+4.  Accessibility Considerations
+
+   One of the long-term goals for RFCs is to make them more accessible,
+   e.g., to sight-impaired readers.  For diagrams, it would be useful
+   for authors to provide alternative forms of the diagram, so that
+   voice-reading software could be used to "talk through" the diagram.
+   Simply reading the SVG code for a complex diagram seems unlikely
+   to work.
+
+
+
+
+
+
+
+Brownlee                      Informational                     [Page 7]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+   SVG 1.2 RFC allows SVG's 'title' and 'desc' elements.  'title'
+   provides a brief text caption for an SVG object (much like a figure
+   caption), and 'desc' provides a longer text description of what the
+   object actually represents.  As well, the SVG 'role' attribute can be
+   used to indicate to a browser how an SVG object is to be interpreted.
+   Good suggestions on how to use these elements are given in
+   [SVG-ACCESS-TIPS].
+
+   ARIA is a W3C Recommendation for using SVG to create (as the name
+   "ARIA" indicates) "Accessible Rich Internet Applications".  A helpful
+   introduction to ARIA is provided by [SVG-ARIA-PRIMER], while
+   [SVG-USING-ARIA] gives examples of how to use ARIA to enhance SVG
+   accessibility.
+
+5.  Examples of Diagrams Common in RFCs
+
+   Another way to create SVG drawings is to write programs to draw them.
+   For example, using Python and its svgwrite module is a pleasant
+   environment (for those who like writing code); this section presents
+   a few examples of diagrams created in this way.  Note that they are
+   merely examples of typical diagrams from RFCs.
+
+   The SVG diagrams for this section, along with an HTML version of this
+   document that includes the SVG diagrams, can be seen at
+   [NB-SVG-1.2-RFC].
+
+5.1.  Packet Layout Diagrams
+
+   Example: Figure 3 from [RFC793].
+
+5.2.  Sequence Diagrams (1)
+
+   Example: Figure 6 from [ExpTrustedProxy].
+
+5.3.  Sequence Diagrams (2)
+
+   Example: Figure 3 from [RFC4321].
+
+6.  Security Considerations
+
+   This document does not introduce any security considerations on
+   its own.
+
+
+
+
+
+
+
+
+
+Brownlee                      Informational                     [Page 8]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+7.  References
+
+7.1.  Normative References
+
+   [RFC6949]  Flanagan, H. and N. Brownlee, "RFC Series Format
+              Requirements and Future Development", RFC 6949,
+              DOI 10.17487/RFC6949, May 2013,
+              <http://www.rfc-editor.org/info/rfc6949>.
+
+   [W3C.REC-SVGTiny12-20081222]
+              Andersson, O., Berjon, R., Dahlstrom, E., Emmons, A.,
+              Ferraiolo, J., Grasso, A., Hardy, V., Hayman, S., Jackson,
+              D., Lilley, C., McCormack, C., Neumann, A., Northway, C.,
+              Quint, A., Ramani, N., Schepers, D., and A. Shellshear,
+              "Scalable Vector Graphics (SVG) Tiny 1.2 Specification",
+              World Wide Web Consortium Recommendation
+              REC-SVGTiny12-20081222, December 2008,
+              <http://www.w3.org/TR/2008/REC-SVGTiny12-20081222>.
+
+   [W3C.REC-CSS2-20110607]
+              Bos, B., Celik, T., Hickson, I., and H. Lie, "Cascading
+              Style Sheets Level 2 Revision 1 (CSS 2.1) Specification",
+              World Wide Web Consortium Recommendation
+              REC-CSS2-20110607, June 2011,
+              <http://www.w3.org/TR/2011/REC-CSS2-20110607>.
+
+7.2.  Informative References
+
+   [W3C.REC-SVG11-20110816]
+              Dahlstrom, E., Dengler, P., Grasso, A., Lilley, C.,
+              McCormack, C., Schepers, D., Watt, J., Ferraiolo, J.,
+              Fujisawa, J., and D. Jackson, "Scalable Vector Graphics
+              (SVG) 1.1 (Second Edition)", World Wide Web Consortium
+              Recommendation REC-SVG11-20110816, August 2011,
+              <http://www.w3.org/TR/2011/REC-SVG11-20110816>.
+
+   [SVG-ACCESS-TIPS]
+              Watson, L., "Tips for Creating Accessible SVG", May 2014,
+              <http://www.sitepoint.com/tips-accessible-svg>.
+
+   [SVG-ARIA-PRIMER]
+              Pappas, L., Schwerdtfeger, R., and M. Cooper,
+              "WAI-ARIA 1.0 Primer", World Wide Web Consortium
+              Working Draft, September 2010,
+              <http://www.w3.org/TR/2010/WD-wai-aria-primer-20100916>.
+
+
+
+
+
+
+Brownlee                      Informational                     [Page 9]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+   [SVG-USING-ARIA]
+              Watson, L., "Using ARIA to enhance SVG accessibility",
+              The Paciello Group, December 2013,
+              <https://www.paciellogroup.com/blog/2013/12/
+              using-aria-enhance-svg-accessibility/>.
+
+   [RFC7991]  Hoffman, P., "The "xml2rfc" Version 3 Vocabulary",
+              RFC 7991, DOI 10.17487/RFC7991, December 2016,
+              <http://www.rfc-editor.org/info/rfc7991>.
+
+   [NB-SVG-1.2-RFC]
+              Brownlee, N., "Index of /materials/format/svg",
+              <https://www.rfc-editor.org/materials/format/svg/>.
+
+   [RFC793]   Postel, J., "Transmission Control Protocol", STD 7,
+              RFC 793, DOI 10.17487/RFC0793, September 1981,
+              <http://www.rfc-editor.org/info/rfc793>.
+
+   [ExpTrustedProxy]
+              Loreto, S., Mattsson, J., Skog, R., Spaak, H., Bourg, G.,
+              Druta, D., and M. Hafeez, "Explicit Trusted Proxy in
+              HTTP/2.0", Work in Progress,
+              draft-loreto-httpbis-trusted-proxy20-01, February 2014.
+
+   [RFC4321]  Sparks, R., "Problems Identified Associated with the
+              Session Initiation Protocol's (SIP) Non-INVITE
+              Transaction", RFC 4321, DOI 10.17487/RFC4321,
+              January 2006, <http://www.rfc-editor.org/info/rfc4321>.
+
+   [RNG-HOME] Murata, M., "RELAX NG home page", February 2014,
+              <http://www.relaxng.org/>.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Brownlee                      Informational                    [Page 10]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+Appendix A.  RELAX NG Compact (RNC) Schema for SVG 1.2 RFC
+
+   The following RNC schema can be used to check whether an SVG file
+   conforms to SVG 1.2 RFC.  For example, if this schema were contained
+   in a file called SVG-1.2-RFC.rnc, the following command will test
+   whether SVG file diagram.svg is a conformant SVG 1.2 RFC drawing.
+
+   jing -c SVG-1.2-RFC.rnc diagram.svg
+
+   The RNC schema included below is available on the RFC Editor website
+   <https://www.rfc-editor.org/materials/format/SVG-1.2-RFC.rnc>.  The
+   website is considered definitive should there be any discrepancies.
+
+#---  SVG 1.2 RFC RNC schema; Nevil Brownlee, Thu 26 Jan 2016 (NZST)
+
+default namespace = "http://www.w3.org/2000/svg"
+namespace ns1 = "http://www.w3.org/1999/xlink"
+
+rfc-color = (  # SVG-1.2-RFC doesn't allow color or grayscale
+  "black" | "white" | "#000000" | "#FFFFFF" | "#ffffff" | "inherit" )
+start = svg
+svg =
+  element svg {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+
+
+
+Brownlee                      Informational                    [Page 11]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute width { xsd:string }?,
+    attribute height { xsd:string }?,
+    attribute preserveAspectRatio {
+      xsd:string { pattern = "\s*(none|xMidYMid)\s*(meet)?\s*" }
+    }?,
+    attribute viewBox { text }?,
+
+
+
+Brownlee                      Informational                    [Page 12]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute zoomAndPan { "disable" }?,
+    attribute version {
+      xsd:string "1.2"
+    }?,
+    attribute baseProfile {
+      xsd:string "tiny"
+    }?,
+    attribute contentScriptType { xsd:string }?,
+    attribute snapshotTime { xsd:string "none" | xsd:string }?,
+    attribute timelineBegin {
+      xsd:string "onLoad" | xsd:string "onStart"
+    }?,
+    attribute playbackOrder {
+      xsd:string "all" | xsd:string "forwardOnly"
+    }?,
+    (desc
+     | svgTitle
+     | path
+     | rect
+     | circle
+     | line
+     | ellipse
+     | polyline
+     | polygon
+     | solidColor
+     | textArea
+     | linearGradient
+     | radialGradient
+     | \text
+     | g
+     | defs
+     | use
+     | a)*
+  }
+desc =
+  element desc {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 13]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    ((attribute display {
+        "inline"
+        | "block"
+        | "list-item"
+        | "run-in"
+        | "compact"
+        | "marker"
+        | "table"
+        | "inline-table"
+        | "table-row-group"
+        | "table-header-group"
+        | "table-footer-group"
+        | "table-row"
+        | "table-column-group"
+        | "table-column"
+        | "table-cell"
+        | "table-caption"
+        | "none"
+        | "inherit"
+      }?,
+      attribute visibility { "visible" | "hidden" | "collapse"
+        | "inherit" }?,
+      attribute image-rendering {
+        "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+      }?,
+      attribute shape-rendering {
+        "auto"
+        | "optimizeSpeed"
+        | "crispEdges"
+        | "geometricPrecision"
+        | "inherit"
+      }?,
+      attribute text-rendering {
+        "auto"
+        | "optimizeSpeed"
+        | "optimizeLegibility"
+        | "geometricPrecision"
+        | "inherit"
+      }?,
+      attribute buffered-rendering {
+
+
+
+Brownlee                      Informational                    [Page 14]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        "auto" | "dynamic" | "static" | "inherit"
+      }?)
+     & (attribute viewport-fill { "none" | rfc-color }?,
+        attribute viewport-fill-opacity { "inherit" | xsd:string }?)),
+    text
+  }
+svgTitle =
+  element title {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    ((attribute display {
+        "inline"
+        | "block"
+        | "list-item"
+        | "run-in"
+        | "compact"
+        | "marker"
+        | "table"
+        | "inline-table"
+        | "table-row-group"
+        | "table-header-group"
+        | "table-footer-group"
+        | "table-row"
+        | "table-column-group"
+        | "table-column"
+        | "table-cell"
+        | "table-caption"
+        | "none"
+        | "inherit"
+      }?,
+
+
+
+Brownlee                      Informational                    [Page 15]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+      attribute visibility { "visible" | "hidden"
+        | "collapse" | "inherit" }?,
+      attribute image-rendering {
+        "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+      }?,
+      attribute shape-rendering {
+        "auto"
+        | "optimizeSpeed"
+        | "crispEdges"
+        | "geometricPrecision"
+        | "inherit"
+      }?,
+      attribute text-rendering {
+        "auto"
+        | "optimizeSpeed"
+        | "optimizeLegibility"
+        | "geometricPrecision"
+        | "inherit"
+      }?,
+      attribute buffered-rendering {
+        "auto" | "dynamic" | "static" | "inherit"
+      }?)
+     & (attribute viewport-fill { "none" | rfc-color }?,
+        attribute viewport-fill-opacity { "inherit" | xsd:string }?)),
+    text
+  }
+path =
+  element path {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute transform { xsd:string | "none" }?,
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+
+
+
+Brownlee                      Informational                    [Page 16]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+
+
+
+Brownlee                      Informational                    [Page 17]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        }?)),
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute d { xsd:string }?,
+    attribute pathLength { xsd:string }?,
+    attribute style { xsd:string }?,  # Added to SVG-1.2-RFC (Inkscape)
+    (desc
+     | svgTitle)*
+  }
+rect =
+  element rect {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute transform { xsd:string | "none" }?,
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+
+
+
+Brownlee                      Informational                    [Page 18]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute x { xsd:string }?,
+    attribute y { xsd:string }?,
+    attribute width { xsd:string }?,
+    attribute height { xsd:string }?,
+    attribute rx { xsd:string }?,
+    attribute ry { xsd:string }?,
+    attribute style { xsd:string }?,  # Added to SVG-1.2-RFC (Inkscape)
+    (desc
+
+
+
+Brownlee                      Informational                    [Page 19]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+     | svgTitle)*
+  }
+circle =
+  element circle {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute transform { xsd:string | "none" }?,
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+
+
+
+Brownlee                      Informational                    [Page 20]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute cx { xsd:string }?,
+    attribute cy { xsd:string }?,
+    attribute r { xsd:string }?,
+    attribute style { xsd:string }?,  # Added to SVG-1.2-RFC (Inkscape)
+    (desc
+     | svgTitle)*
+  }
+line =
+  element line {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 21]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute transform { xsd:string | "none" }?,
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+
+
+
+Brownlee                      Informational                    [Page 22]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute x1 { xsd:string }?,
+    attribute y1 { xsd:string }?,
+    attribute x2 { xsd:string }?,
+    attribute y2 { xsd:string }?,
+    (desc
+     | svgTitle)*
+  }
+ellipse =
+  element ellipse {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute transform { xsd:string | "none" }?,
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 23]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute requiredFeatures { xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 24]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute rx { xsd:string }?,
+    attribute ry { xsd:string }?,
+    attribute cx { xsd:string }?,
+    attribute cy { xsd:string }?,
+    attribute style { xsd:string }?,  # Added to SVG-1.2-RFC (Inkscape)
+    (desc
+     | svgTitle)*
+  }
+polyline =
+  element polyline {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute transform { xsd:string | "none" }?,
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+
+
+
+Brownlee                      Informational                    [Page 25]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute points { xsd:string }?,
+    (desc
+     | svgTitle)*
+  }
+polygon =
+  element polygon {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+
+
+
+Brownlee                      Informational                    [Page 26]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute transform { xsd:string | "none" }?,
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+
+
+
+Brownlee                      Informational                    [Page 27]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute points { xsd:string }?,
+    attribute style { xsd:string }?,  # Added to SVG-1.2-RFC (Inkscape)
+    (desc
+     | svgTitle)*
+  }
+solidColor =
+  element solidColor {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+
+
+
+Brownlee                      Informational                    [Page 28]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 29]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    (desc
+     | svgTitle)*
+  }
+textArea =
+  element textArea {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+
+
+
+Brownlee                      Informational                    [Page 30]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute transform { xsd:string | "none" }?,
+    attribute x { xsd:string }?,
+    attribute y { xsd:string }?,
+    attribute width { xsd:string | "auto" }?,
+    attribute height { xsd:string | "auto" }?,
+    (tspan
+     | desc
+     | svgTitle
+     | tspan_2
+     | text
+     | a_2)+
+  }
+linearGradient =
+  element linearGradient {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 31]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+
+
+
+Brownlee                      Informational                    [Page 32]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute gradientUnits { "userSpaceOnUse" | "objectBoundingBox" }?,
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute x1 { xsd:string }?,
+    attribute y1 { xsd:string }?,
+    attribute x2 { xsd:string }?,
+    attribute y2 { xsd:string }?,
+    (desc
+     | svgTitle)*
+  }
+radialGradient =
+  element radialGradient {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+
+
+
+Brownlee                      Informational                    [Page 33]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute gradientUnits { "userSpaceOnUse" | "objectBoundingBox" }?,
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 34]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute cx { xsd:string }?,
+    attribute cy { xsd:string }?,
+    attribute r { xsd:string }?,
+    (desc
+     | svgTitle)*
+  }
+\text =
+  element text {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+
+
+
+Brownlee                      Informational                    [Page 35]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute transform { xsd:string | "none" }?,
+    attribute x { xsd:string }?,
+    attribute y { xsd:string }?,
+    attribute rotate { xsd:string }?,
+    attribute style { xsd:string }?,  # Added to SVG-1.2-RFC (Inkscape)
+    (desc
+     | svgTitle
+     | tspan_2
+     | text
+     | a_2)+
+  }
+g =
+  element g {
+
+
+
+Brownlee                      Informational                    [Page 36]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+
+
+
+Brownlee                      Informational                    [Page 37]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute transform { xsd:string | "none" }?,
+    attribute style { xsd:string }?,
+        # Added to SVG-1.2-RFC (for Inkscape)
+    attribute visibility {
+      "visible" | "hidden" | "collapse" | "inherit" }?,
+        # Added to SVG-1.2-RFC (for LibreOffice)
+    (desc
+     | svgTitle
+     | path
+     | rect
+     | circle
+     | line
+     | ellipse
+     | polyline
+     | polygon
+     | solidColor
+     | textArea
+     | linearGradient
+     | radialGradient
+     | \text
+     | g
+     | defs
+     | use
+
+
+
+Brownlee                      Informational                    [Page 38]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+     | a)*
+  }
+defs =
+  element defs {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+
+
+
+Brownlee                      Informational                    [Page 39]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    (desc
+     | svgTitle
+     | path
+     | rect
+     | circle
+     | line
+     | ellipse
+     | polyline
+     | polygon
+     | solidColor
+     | textArea
+     | linearGradient
+     | radialGradient
+     | \text
+     | g
+     | defs
+     | use
+     | a)*
+  }
+use =
+  element use {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+
+
+
+Brownlee                      Informational                    [Page 40]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+
+
+
+Brownlee                      Informational                    [Page 41]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute transform { xsd:string | "none" }?,
+    attribute ns1:show { "embed" }?,
+    attribute ns1:actuate { "onLoad" }?,
+    attribute ns1:type { "simple" }?,
+    attribute ns1:role { xsd:anyURI | xsd:string }?,
+    attribute ns1:arcrole { xsd:anyURI | xsd:string }?,
+    attribute ns1:title { text }?,
+    attribute ns1:href { xsd:anyURI | xsd:string }?,
+    attribute x { xsd:string }?,
+    attribute y { xsd:string }?,
+    (desc
+     | svgTitle)*
+  }
+a =
+  element a {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 42]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+
+
+
+Brownlee                      Informational                    [Page 43]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute transform { xsd:string | "none" }?,
+    attribute ns1:show { "new" | "replace" }?,
+    attribute ns1:actuate { "onRequest" }?,
+    attribute ns1:type { "simple" }?,
+    attribute ns1:role { xsd:anyURI | xsd:string }?,
+    attribute ns1:arcrole { xsd:anyURI | xsd:string }?,
+    attribute ns1:title { text }?,
+    attribute ns1:href { xsd:anyURI | xsd:string }?,
+    attribute target {
+      "_replace" | "_self" | "_parent" | "_top" | "_blank" | xsd:Name
+    }?,
+    (desc
+     | svgTitle
+     | path
+     | rect
+     | circle
+     | line
+     | ellipse
+     | polyline
+     | polygon
+     | solidColor
+     | textArea
+     | linearGradient
+     | radialGradient
+     | \text
+     | g
+     | defs
+     | use)*
+  }
+stop =
+  element stop {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "inherit" | xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 44]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { "inherit" | xsd:string }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { "inherit" | xsd:string }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { "inherit" | xsd:string }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+
+
+
+Brownlee                      Informational                    [Page 45]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute offset { xsd:string }?,
+    (desc
+     | svgTitle)*
+  }
+tspan =
+  element tspan {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+
+
+
+Brownlee                      Informational                    [Page 46]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 47]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute x { xsd:string }?,  # For SVG-1.2-RFC
+    attribute y { xsd:string }?,
+    (tbreak
+     | desc
+     | svgTitle
+     | tspan_2
+     | text
+     | a_2)+
+  }
+tspan_2 =
+  element tspan {
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+
+
+
+Brownlee                      Informational                    [Page 48]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    attribute x { xsd:string }?,  # For SVG-1.2-RFC
+    attribute y { xsd:string }?,
+    (desc
+     | svgTitle
+     | tspan_2
+     | text
+     | a_2)+
+  }
+a_2 =
+  element a {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+
+
+
+Brownlee                      Informational                    [Page 49]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?,
+    ((attribute fill-opacity { "inherit" | xsd:string }?,
+      attribute stroke-opacity { "inherit" | xsd:string }?)
+     & (attribute fill { "none" | rfc-color }?,
+        attribute fill-rule { "inherit" | "nonzero" | "evenodd" }?,
+        attribute stroke { rfc-color }?,
+        attribute stroke-dasharray { "inherit" | "none" | xsd:string }?,
+        attribute stroke-dashoffset { "inherit" | xsd:string }?,
+        attribute stroke-linecap {
+          "butt" | "round" | "square" | "inherit"
+        }?,
+        attribute stroke-linejoin {
+          "miter" | "round" | "bevel" | "inherit"
+        }?,
+        attribute stroke-miterlimit { "inherit" | xsd:string }?,
+        attribute stroke-width { "inherit" | xsd:string }?,
+        attribute color { rfc-color }?,
+        attribute color-rendering {
+          "auto" | "optimizeSpeed" | "optimizeQuality" | "inherit"
+        }?)
+     & attribute vector-effect {
+         "none" | "non-scaling-stroke" | "inherit"
+       }?
+     & (attribute direction { "ltr" | "rtl" | "inherit" }?,
+        attribute unicode-bidi {
+          "normal" | "embed" | "bidi-override" | "inherit"
+        }?)
+     & (attribute solid-color { rfc-color }?,
+        attribute solid-opacity { "inherit" | xsd:string }?)
+     & (attribute display-align {
+          "auto" | "before" | "center" | "after" | "inherit"
+
+
+
+Brownlee                      Informational                    [Page 50]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+        }?,
+        attribute line-increment { "auto" | "inherit" | xsd:string }?)
+     & (attribute stop-color { rfc-color }?,
+        attribute stop-opacity { "inherit" | xsd:string }?)
+     & (attribute font-family { "inherit" | xsd:string }?,
+        attribute font-size { "inherit" | xsd:string }?,
+        attribute font-style {
+          "normal" | "italic" | "oblique" | "inherit"
+        }?,
+        attribute font-variant { "normal" | "small-caps" | "inherit" }?,
+        attribute font-weight {
+          "normal"
+          | "bold"
+          | "bolder"
+          | "lighter"
+          | "inherit"
+        }?,
+        attribute text-anchor {
+          "start" | "middle" | "end" | "inherit"
+        }?,
+        attribute text-align {
+          "start" | "center" | "end" | "inherit"
+        }?)),
+    attribute transform { xsd:string | "none" }?,
+    attribute ns1:show { "new" | "replace" }?,
+    attribute ns1:actuate { "onRequest" }?,
+    attribute ns1:type { "simple" }?,
+    attribute ns1:role { xsd:anyURI | xsd:string }?,
+    attribute ns1:arcrole { xsd:anyURI | xsd:string }?,
+    attribute ns1:title { text }?,
+    attribute ns1:href { xsd:anyURI | xsd:string }?,
+    attribute target {
+      "_replace" | "_self" | "_parent" | "_top" | "_blank" | xsd:Name
+    }?,
+    (desc
+     | svgTitle
+     | tspan_2
+     | text)+
+  }
+tbreak =
+  element tbreak {
+    (attribute id { xsd:NCName }
+     | attribute xml:id { xsd:NCName })?,
+    attribute xml:base { xsd:anyURI | xsd:string }?,
+    attribute xml:lang { xsd:language? }?,
+    attribute class { xsd:NMTOKENS }?,
+    attribute role { xsd:string }?,
+    attribute rel { xsd:string }?,
+
+
+
+Brownlee                      Informational                    [Page 51]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+    attribute rev { xsd:string }?,
+    attribute typeof { xsd:string }?,
+    attribute content { xsd:string }?,
+    attribute datatype { xsd:string }?,
+    attribute resource { xsd:string }?,
+    attribute about { xsd:string }?,
+    attribute property { xsd:string }?,
+    attribute xml:space { "default" | "preserve" }?,
+    attribute requiredFeatures { xsd:string }?,
+    attribute requiredExtensions { xsd:string }?,
+    attribute requiredFormats { xsd:string }?,
+    attribute requiredFonts { xsd:string }?,
+    attribute systemLanguage { xsd:string }?
+  }
+
+#---  End of SVG 1.2 RFC RNC schema
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Brownlee                      Informational                    [Page 52]
+
+RFC 7996           SVG Drawings for RFCs: SVG 1.2 RFC      December 2016
+
+
+IAB Members at the Time of Approval
+
+   The IAB members at the time this memo was approved were
+   (in alphabetical order):
+
+      Jari Arkko
+      Ralph Droms
+      Ted Hardie
+      Joe Hildebrand
+      Russ Housley
+      Lee Howard
+      Erik Nordmark
+      Robert Sparks
+      Andrew Sullivan
+      Dave Thaler
+      Martin Thomson
+      Brian Trammell
+      Suzanne Woolf
+
+Acknowledgements
+
+   Thanks to the RSE and the Design Team members for their helpful
+   comments and suggestions for SVG 1.2 RFC.  Thanks also to the wider
+   IETF community for their input.
+
+Author's Address
+
+   Nevil Brownlee
+   The University of Auckland
+
+   Email: n.brownlee@auckland.ac.nz
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Brownlee                      Informational                    [Page 53]
+
-- 
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