Standard Span tags https://github.com/opentracing/specification/blob/master/semantic_conventions.md#span-tags-table.

legacy tag.

Standard Span tags https://github.com/opentracing/specification/blob/master/semantic_conventions.md#span-tags-table.

The software package, framework, library, or module that generated the associated Span.

user define.

Database instance name.

A database statement for the given database type.

Database type.

Username for accessing database.

true if and only if the application considers the operation represented by the Span to have failed type bool.

HTTP method of the request for the associated Span.

HTTP response status code for the associated Span.

URL of the request being handled in this segment of the trace, in standard URI format.

An address at which messages can be exchanged.

Remote "address", suitable for use in a networking client library.

Remote hostname.

Remote IPv4 address as a .-separated tuple.

Remote IPv6 address as a string of colon-separated 4-char hex tuples.

Remote port.

Remote service name (for some unspecified definition of "service").

If greater than 0, a hint to the Tracer to do its best to capture the trace.

Either "client" or "server" for the appropriate roles in an RPC, and "producer" or "consumer" for the appropriate roles in a messaging scenario.