Per instructions from KM-F:

• A new document status called "assigned" is available and documented in the schema.
• A caption and explanatory text for it have been added to boilerplate.xml.
• All XQuery modules have been updated to respond to this status appropriately.
• XQuery libraries have now been largely rationalized to use a single central variable ($inc:publicDocuments) in includes.xql, which contains a list of the status values that we deem to be "public". This variable is now used everywhere. Previously, lists of document status values appeared wherever they were needed in the code, making it difficult to manage central changes such as the addition of a new value.

Tested on dev, then published to live.