bf:titleType

[kiegel]

It would be helpful to have a thesaurus of title types, to promote consistency and machine use. A thesaurus could be started with the text from indicator 2 of field 246.

Portion of title
Parallel title
Distinctive title
Other title
Cover title
Added title page title
Caption title
Running title
Spine title

When a standard title type is used, a URI should be assigned, and when a record gives a non-standard note, then that value can be used as a literal (e,g, 246 $i). To support this, BIBFRAME needs two properties for title type: e.g. titleType changed to have a range of URI, and titleTypeNote with a range of literal.