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4.2. Medium of performance testing: preliminary report

Posted By Kirk-Evan Billet, Wednesday, February 25, 2015

(Kirk-Evan Billet, Anna Alfeld, Sophie Rondeau)

This section will focus on evaluating the current state of MARC-to-Bibframe transformation for medium of performance data. Primarily, the working group will assess the Library of Congress Bibframe transformation tool, but we may turn also to MarcEdit and Zepheira conversion utilities.


In the current MARC environment, medium of performance data occurs as coded statements, as part of access points, and in notes. Recognizing that there is a project underway to develop a programmatic method for generating LCMPT terms from MARC 6XX (as well as from MARC 048) for use in MARC 382, we will not address medium as expressed in LCSH; at the same time, it must be acknowledged that, for some older or briefer records, MARC 650 may contain the only medium information in the record. Medium in notes is considered a trivial case, since it is expected that these will be simply retained as Bibframe notes. Therefore, our main task will be evaluating current transformation of coded medium of performance data in light of functional requirements identified in earlier task force and BCC work. Though we will be testing MARC-to-Bibframe transformation, we hope to keep in mind an ideal for newly-created data in Bibframe.


Certain challenges are already apparent. MARC 048 codes will require mapping to LCMPT, either prior to or as a step in transformation. MARC 382 subfielding relies on adjacency for meaning, and the field may include some note-type information. Other questions concern the need for medium of performance at the work and expression levels and to what extent the Bibframe vocabulary may need to be revised in order to fully embrace medium of performance data.


Each member of the working group will compile test files of MARC records and convert them to MARC-XML as necessary. We will look first at score records and then at audio-visual records. After individual members have run tests, we will compile results, evaluate, characterize the current state of transformation, and formulate recommendations.


Tags:  BIBFRAME  Data Migration  MA  medium of performance 

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Comments on this post...

Kimmy Szeto says...
Posted Thursday, March 12, 2015
Let me make sure I understand correctly – you will NOT look at 650 or 5XX, but will look at 048 and 382. Is that right? I think that’s a good idea. I just want to make sure in this part of the work we focus on the MARC-to-BIBFRAME transformation----starting with choosing which MARC fields to examine.

In fact, I think it’s a great question as to HOW, procedurally, we could make medium of performance information in 650 useful. May be the way to do it is, like you mentioned what’s already under way, to *first* parse the information in 650 and put that into 048 and/or 382, and *then* transform the 048/382 into linked data. And, of course, if we support that hypothesis, we should also discuss the disadvantages of transforming 650 directly into medium of performance linked data and why the intermediate step via 048/382 is better. I can only ask the questions right now and certainly don’t have any answers !
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