Drug attributes about dgidb-v5 HOT 4 CLOSED

Drug indications:

• Currently stored as drug attributes.
• Should "drug class"-y values be retained (eg indication=antineoplastic agent)?
• Values could/should be normalized?

from dgidb-v5.

Proposed implementation:

• Continue to store raw attributes at drug claim level (though make some effort to split up conjoined values, like antineoplastic agents, homeopathic agents, into multiple attributes)
• Continue to combine drug claim attributes into drug attributes, but normalize the values (so eg both antineoplastic agent and antineoplastic agents become the same value).
• Do some QC in the importers to ensure values that should be drug classes don't end up as drug indications.
• Also do some QC in the importers on approval data ("approved" should be a yes/no, anything else should go in indications or elsewhere)

from dgidb-v5.

Top-level Drugs get their Type attributes based on the normalization routine here -- we'll circle back to normalizing individual values as well as the big, grouped values (we should also make a Rake task for updating these values)

from dgidb-v5.

Closed by #215.

from dgidb-v5.