OpenTelemetry SDK
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    Variable ATTR_URL_EXTENSIONConst Experimental

    ATTR_URL_EXTENSION: "url.extension" = ...

    The file extension extracted from the url.full, excluding the leading dot.

    png
    
    gz
    

    The file extension is only set if it exists, as not every url has a file extension. When the file name has multiple extensions example.tar.gz, only the last one should be captured gz, not tar.gz.

    This attribute is experimental and is subject to breaking changes in minor releases of @opentelemetry/semantic-conventions.