Convert SHACL to ShEx

[labra]

This issue is expected to track the feature that converts SHACL shapes to ShEx schemas.

This is a work-in-progress feature. We still need to document the SHACL features supported in the conversion.

[elf-pavlik]

I tried converting SHACL to ShEx, and got this error:

cargo run -- convert --input-mode shacl --source-file ../../solid/catalog/catalog-shacl.ttl --export-mode shex
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
     Running `target/debug/rudof convert --input-mode shacl --source-file ../../solid/catalog/catalog-shacl.ttl --export-mode shex`
Error: Can't obtain SHACL format from shexc

It was yesterday on master branch.

[labra]

The command you provided is missing the parameter format to specify the format of the input file, which in the case of SHACL is probably turtle.

The expected invocation would be something like:

cargo run convert --input-mode shacl --source-file shacl_file.ttl --format turtle --export-mode shex --result-format shexc

Notice, however, that most of the features from SHACL are not yet supported. We have just implemented a very quick prototype.