Add preliminary extension exclusions.

[balhoff]

@tmushayahama can you check that you can update your python script to find these tags in order to avoid creating entries in the JSON file for these lines?

[tmushayahama]

Hi @balhoff I was trying to parse the shex using the PyShex but the exclude form extensions is not in annotations or exprs. Do you need to define it.

[tmushayahama]

@balhoff yes this is working @vanaukenk @ukemi you can add these extensions exclusions . However, lets make a dev branch and play with shex there. What do you think? is main branch shex editing okay?

tagging @kltm

[kltm]

At some point, we'll want to have a development branch (or branches, to try new things and work with new data) and a production branch that is meant to be stable for working with release data. As we're not doing much with ShEx and production data at the moment, we can be flexible, but we'll likely eventually want to make a distinction.