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// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package keys

var (
	// Msg is a key used to add message strings to label lists.
	Msg = NewString("message", "a readable message")
	// Label is a key used to indicate an event adds labels to the context.
	Label = NewTag("label", "a label context marker")
	// Start is used for things like traces that have a name.
	Start = NewString("start", "span start")
	// Metric is a key used to indicate an event records metrics.
	End = NewTag("end", "a span end marker")
	// Metric is a key used to indicate an event records metrics.
	Detach = NewTag("detach", "a span detach marker")
	// Err is a key used to add error values to label lists.
	Err = NewError("error", "an error that occurred")
	// Metric is a key used to indicate an event records metrics.
	Metric = NewTag("metric", "a metric event marker")
)