OXIO Source: content type (supplied in headnote)
Capture the content type in the source XML in a metaDescribes element with a predicate of 'law-content-type'.
If there are multiple content types listed (separated by a semicolon), capture each in a separate metaDescribes.
Use the short code for each content type.
Headnote transmittal, and source document XML
<metaDescribes predicate="law-content-type">memor</metaDescribes>
<metaDescribes predicate="law-content-type">bt</metaDescribes>