Comment 1 for bug 1442815

Patches are available in the collab/gmcharlt/lp1442815_teach_record_attributes_about_skos branch in the working/Evergreen repository. A couple things to note:

- the fix for bug 1442796 is a dependency
- the RDA record attribute definitions use XPath rather than tag/sf_list for extracting the coded values from the 33x$a. This is because the latter draws values from mfr, which over-normalizes strings for our purposes.