Michael Borries <michael.borr...@mail.cuny.edu> wrote: > At this point is it considered necessary in fields 336-338 to use both > subfield $a with the term spelled out and also subfield $b with the code, or > is subfield $a with the term spelled out sufficient? I seem to see both > usages in various records and instructions.
It's not necessary to use both, only a preference among three (just $a, just $b, or both). Our shop is posting both terms and codes, in part because I feel it's easier to remove something from the record than to add it in. Plus, if someone wanted to use the codes to generate different terminology in the display, they may do so while ignoring/removing the term in the $a (and for the sake of argument, ignoring other parts of the MARC record that might duplicate this info, e.g., LDR/06 and 007/00): MARC record: 336 -- cartographic tactile three-dimensional form $b crn $2 rdacontent 337 -- unmediated $b n $2 rdamedia 338 -- object $b nr $2 rdacarrier ILS innards: Convert $b crn + $b nr to "Globe, etc. (Braille)" OPAC display: Material: Globe, etc. (Braille) Title: ... -- Mark K. Ehlert Minitex <http://www.minitex.umn.edu/>
