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@@ -7,6 +7,11 @@ far too bloated, visually polluting your documents.
 support for such things, just use a programming- or macro language such as
 Python or M4.
 
+`GSP` also supports transpilation into XML.  This is exactly the same as
+transpilation to HTML except tags with no children take the form of `<tag/>`
+instead of `<tag>`.  To enable XML transpilation, add an XML document type at
+the top of your document.
+
 ## Why Not Use Pug or [INSERT LANGUAGE HERE]
 
 Simply put, they are all trash.  Pug has decent syntax but requires you use