Where to register new specification extension namespaces?

[DavidBiesack]

https://spec.openapis.org/registry/namespace/ says to open a new Pull-Request and links to https://github.com/OAI/OpenAPI-Specification/pulls
I've checked out the gh-pages branch and found the the registry/extension.md file. That page mentions site.extension but I don't know where/how that value gets defined. I searched for x-sap which is mentioned on the page, but that text is not in the repo either.
I found registries/_namespace/sap.md , so I was able to copy that to define a new extension namespace (registries/_namespace/fdx.md)
but when I built/ran Jekyll locally via the instructions on CONTRIBUTING.md my local http://127.0.0.1:4000/registry/extension/ contains only one row, for x-twitter; it does not show the content from sap.md or the new file I created.

How does one submit a PR for new extension namespaces - namely, how to add a new namespace?

[DavidBiesack]

OK, I see my error. My new namespace appears in http://127.0.0.1:4000/registry/namespace/index.html

I'll update these instructions in my PR that adds the x-fdx namespace.

[lornajane]

Thanks @DavidBiesack ! I see the PR is already open #4567

[lornajane]

@DavidBiesack Do you need anything else from us on this? Thank you for the registry update and especially for the contributing file improvements!

[DavidBiesack]

Thanks @lornajane -- no further questions - thanks for the assist on the doc PRs!