Are there semantic conventions for metrics?

[yangd102]

Are there semantic conventions for metrics? For example for backend calls (rpc, http, apis etc) could have a general metric of the form. This doesn't make much of a difference if you only do gRPC, however if there are several types of ways to do backend calls, should there be a set of lowest common denominator metrics that everyone can use?

opentelemetry.io/server/count { name, status }
opentelemetry.io/server/latency { name, status }

opentelemetry.io/client/count { name, status }
opentelemetry.io/client/latency { name, status }

[jmacd]

Metrics should use the same semantic conventions that spans and resources do. Are there any missing conventions?

[bogdandrutu]

Duplicate of #651