this PR is ready for the review, @opentelemetry-python-contrib-approvers please take a look!

Thanks, @lmolkova, I am trying to debug the failing tests in the core repo.

@ocelotl it seems core tests fail on span name check.
AssertionError: '"name": "HTTP GET"' not found in ... "name": "GET"

Span names were changed in #1759, but core tests were not updated to reflect it. I'm not sure what was the reason to remove `HTTP " from client span names, LMK what should be fixed - the name or the core tests. It seems the spec has changed - I'll update core tests. Thanks!

@ocelotl it seems core tests fail on span name check. AssertionError: '"name": "HTTP GET"' not found in ... "name": "GET"

Span names were changed in #1759, but core tests were not updated to reflect it. I'm not sure what was the reason to remove `HTTP " from client span names, LMK what should be fixed - the name or the core tests. Thanks!

Right, I just filed this issue, will take care of it, thanks!

I think @lzchen had some points around the transition plan. Bringing this up in the SIG meeting (again) might be a good idea.

I think @lzchen had some points around the transition plan. Bringing this up in the SIG meeting (again) might be a good idea.

Added to the SIG notes.

Closing this one.

Schema URL is populated in #1977, and @lzchen will prototype side-by-side new/old semconv in selected instrumentations