adapter.aasx: resolution of `file://` references about basyx-python-sdk

[s-heppner]

Actually, I believe this may be a problem with the specification. In Part 5 Package File Format, it is specified that Submodels should reference supplementary AASX-files via a "relative URI" in the File SubmodelElement.

[s-heppner]

Some further research proves constraint that the file:// prefix is mandatory in the PathType is wrong: PathType Definition. Therefore, it would appear that the schemata is wrong here. I'll look into it.

[s-heppner]

I opened an Issue at aas-core.

[s-heppner]

RFC 8089 may not allow for relative paths, have you tried to start with a . though?

[jkhsjdhjs]

Thanks for the investigation!

RFC 8089 may not allow for relative paths, have you tried to start with a . though?

I haven't tried that yet, but /TestFile.pdf looks more like an absolute path to me anyways, where / is the root of the AASX package.

[s-heppner]

As an ugly temporary fix, so that AASX-packages can used, we decided to remove the regex check from the schemata.
We need to document this though and revert these changes with the upcoming spec fix.