Check first versionIRI then versionInfo in ontology.get_version()

[francescalb]

Description:

Improve on get_version in ontology so that also versionInfo is checked for.

See discussion on #299

Also changed so that rdflib can guess format in ontoversion.

Ontoversion only checks for version from versionIRI as this should be the case for a correctly defined ontology.

Type of change:

• Bug fix.
• New feature.
• Documentation update.

Checklist:

This checklist can be used as a help for the reviewer.

• Is the code easy to read and understand?
• Are comments for humans to read, not computers to disregard?
• Does a new feature has an accompanying new test (in the CI or unit testing schemes)?
• Has the documentation been updated as necessary?
• Does this close the issue?
• Is the change limited to the issue?
• Are errors handled for all outcomes?
• Does the new feature provide new restrictions on dependencies, and if so is this documented?

Comments:

[francescalb]

@jesper-friis
Can you please look at the ontology.get_version() now and see if you think this is the way to go forward?
I am now giving precedence to versionInfo, but this should be discussed.

the tools/ontoversion is not implemented correctly yet as I want us to decide if this is the right approach first.

[jesper-friis]

Looks very good.

My only question is whether we should encourage setting versionInfo to just be the version number without the prepended "v".

[francescalb]

Looks very good.

My only question is whether we should encourage setting versionInfo to just be the version number without the prepended "v".

Sure, it did it to keep track of versionIRI vs versionInfo, but it should be removed now.