Should we require availability information for digital sources

[cmil]

Looking at issue #10 I noticed that many corpora (for instance ClaDraCor, HunDraCor, ItaDraCor, UDraCor) do not add availability information to their source references. Is that ok or should we add a schematron warning telling encoders that availability information should be added?

If so, what would be the rules for providing this information? Is <availability><p>In the public domain.</p></availability> ok, or should there be always be a reference to a licence?

[lb42]

I think it would be wise to insist on an explicit statement of availability, which should normally include a . Of course the explicit statement might just say "We (Dracor) believe this material to be in the public domain, but the corpus providers have not explicitly stated this. Use at your own risk. "