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Tracestate conveys information about the position/ordering of a request in multiple distributed tracing graphs. It consists of a list of at most 32 ordered Tracestate entries.


A tracestate entry is a key-value pair used to annotate a positional state. It consists of:

Field Description Restrictions
Key a collection of characters MUST begin with a lower case letter, can contain lowercase alphanumeric, dashes, asteriks and forward slashes
Value a collection of characters ONLY printable ASCII characters