W3C Trace Context

1. Design overview

   Why a standard propagation format is needed.

2. traceparent header

   version, trace-id, parent-id and trace-flags format.

3. tracestate header

   Vendor-specific key/value list for tracing systems.

4. Mutating traceparent

   How vendors update parent-id and sampled flag.

5. Processing model

   Behavior when traceparent is absent or invalid.

6. Privacy and security

   Information exposure and denial of service concerns.

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