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Clarify key-value format (issue 4296) #4315

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Clarify key-value format (issue 4296) #4315

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2 changes: 1 addition & 1 deletion specification/protocol/exporter.md
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Expand Up @@ -165,7 +165,7 @@ release).

### Specifying headers via environment variables

The `OTEL_EXPORTER_OTLP_HEADERS`, `OTEL_EXPORTER_OTLP_TRACES_HEADERS`, `OTEL_EXPORTER_OTLP_METRICS_HEADERS`, `OTEL_EXPORTER_OTLP_LOGS_HEADERS` environment variables will contain a list of key value pairs, and these are expected to be represented in a format matching to the [W3C Baggage](https://www.w3.org/TR/baggage/#header-content), except that additional semi-colon delimited metadata is not supported, i.e.: key1=value1,key2=value2. All attribute values MUST be considered strings.
The `OTEL_EXPORTER_OTLP_HEADERS`, `OTEL_EXPORTER_OTLP_TRACES_HEADERS`, `OTEL_EXPORTER_OTLP_METRICS_HEADERS`, `OTEL_EXPORTER_OTLP_LOGS_HEADERS` environment variables will contain a list of key value pairs, and these are expected to be represented in a format matching [W3C Baggage](https://www.w3.org/TR/baggage/#header-content) i.e., `key1=value1,key2=value2`. Semi-colon delimited metadata is not supported. All attribute values MUST be considered strings.
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Maybe add a link to "Semi-colon delimited metadata", point to https://www.w3.org/TR/baggage/#property.


## Retry

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