MARC 521

[kiegel]

Field 521 (Target Audience Note) needs some work.

Currently, it maps both to bf:note and to a link for intended audience.

521 8_ |a MPAA rating: PG; for some crude comments, language and action violence CHV rating: PG.

becomes:

bf:note "MPAA rating: PG; for some crude comments, language and action violence CHV rating: PG.";

http://example.org/99161786523101452intendedaudience30 a bf:IntendedAudience ; bf:audience "MPAA rating: PG; for some crude comments, language and action violence CHV rating: PG." .

1) It seems duplicative to have both a note and a link. Perhaps only one is needed.

2) Display constants for first indicator values blank through 4 need to be included. The chief reason is that the text in subfield a may not be intelligible without the display constant. See the MARC format examples:

521 0 3.1. 521 1 008-012. 521 2 7 $ up.

For these first indicator values, using a link makes sense because you can include the display constant, along the lines of:

http://example.org/99161786523101452intendedaudience30 a bf:IntendedAudience ; bf:audience "7 & up."; bf:label "Interest grade level".

Perhaps a new property is needed to express the audience display constant, rather than bf:label.

3) First indicator 8 (no display constant) is different, and perhaps bf:note is best, rather than a link. The indicator is often used, as in our example record, for information that is actually not a description of the target audience.

4) Subfield a is repeatable and multiple occurrences have caused us conversion problems.

(OCLC #871568390)

[kiegel]

After looking at some cases, we think the bf:note in the instance should be eliminated. The link for intended audience is sufficient.