archivesspace/archivesspace — pull request #103 by mark-cooper (2014-10-21 19:44:47+00:00)
Title: Subjects and agents import requires source

Importing subjects and agents (marcxml) requires that the extracted
field have a source specified in the ind2 or subfield with code 2,
otherwise it will fail with "source : Property is required but was
missing".

Expecting this to always be the case is a little unrealistic. So
fallback to 'Source not specified' if the above criteria is not met.