Quoting Karen Coyle: > If someone asked for list of MARC data elements, what would you give > them? Given the mess that is MARC today (fully understandable after 40 > years of incremental changes) how easy is it to explain it?
The RDA Tookit has excellent RDA <> MARC maps for bibliographic and authority MARC fields. Appendix D.2 and E.2 in RDA have useful maps, but they're not as detailed as the maps under the Tools tab. Just as an illustration, I did a quick run through looking for all MARC subfields that can map to two or more RDA elements (listed below). What would be useful beyond this are RDA elements that map to, say, both a MARC variable field and a fixed field, or map to a both subfield in an authorized access point and to one of the new MARC fields for individual RDA elements. There's an interesting dynamic occurring with authorized access points, where many elements that go into them are now accounted for separately. The Preferred name element seems to be stuck in 100$a/110$a as the only place where this element is found (even if it still has to share the subfield with other elements, as is the case for corporate body preferred names!). Something only found in an authorized access point now, the Fuller Form of Name element (100 $q) is being suggested as being also housed in its own element in 378 (http://www.loc.gov/marc/marbi/2011/2011-dp02.html). So an authorized access point continues to be the only home for a few individual elements, such as the Preferred Name elements, but the whole authorized access point functions as a single value for other elements (such as Creator, Contributor, Related Corporate Body, and so on). In some cases in the list below, punctuation can be used to differentiate some elements, such as: 300 $a 232 pages (large print) which maps to the Extent of Text element and to the Font Size element (although Font Size is now being suggested for a move to 340$n (http://www.loc.gov/marc/marbi/2011/2011-dp04.html). Bibliographic MARC subfields that can be mapped to two or more RDA elements: 024 a 024 d 024 z 100 c 100 u 100 a 100 f 100 t 110 a 110 c 110 f 110 n 110 t 111 a 111 c 111 d 111 f 111 n 111 t 130 a 130 f 130 k 130 n 240 a 240 f 240 n 243 a 243 n 245 b 245 c 245 k 250 a 250 b 254 a 255 a 255 e 256 a 260 a 260 b 260 c [here's the fab four: Date of production, Date of Publication, Copyright Date, Date of Distribution] 260 e 260 f 300 a 300 b 300 c 310 b 340 f 362 a 490 a 490 v 490 x 500 a 502 a 516 a 518 a 538 a 542 e 542 i 542 k 542 p 546 a 546 b 556 a 580 a 581 a 700 c 700 u 700 a 700 d 700 f 700 n 700 t 710 a 710 c 710 d 710 f 710 g 710 n 710 t 711 a 711 c 711 d 711 f 711 n 711 t 730 a 730 f 730 k 730 n 787 a 787 b 787 c 787 d 787 h 787 k 787 m 787 n 787 o 787 s 787 t 787 w 800 c 800 u 800 a 800 d 800 f 800 n 800 t 800 v 800 x 810 a 810 c 810 d 810 f 810 g 810 n 810 t 810 v 810 x 811 a 811 c 811 d 811 f 811 n 811 t 811 v 830 a 830 f 830 k 830 n 830 v 830 x Authority MARC subfields that can be mapped to two or more RDA elements (the authorized access points subfields listed repeat the ones in the bibliographic record fields as the same elements would be involved): 010 a 010 z 016 a 016 z 024 a 035 a 046 k 046 l 046 s 046 t 100 c 100 a 100 d 100 t 110 a 110 c 110 d 110 f 110 g 110 n 110 t 111 a 111 c 111 d 111 f 111 n 111 t 130 a 130 f 130 k 130 n 370 e 370 f 371 a 371 b 371 c 371 d 371 e 371 m 371 z 372 a 377 a 381 a 400 c 400 a 400 d 400 f 400 n 400 p 400 t 410 a 410 c 410 d 410 f 410 g 410 n 410 t 411 a 411 c 411 d 411 f 411 n 411 p 411 t 430 a 430 f 430 k 430 n 500 c 500 a 500 d 500 f 500 n 500 t 510 a 510 c 510 d 510 f 510 g 511 i 510 k 510 n 510 t 511 a 511 c 511 d 511 f 511 k 511 n 511 t 530 a 530 f 530 n 663 a 665 a 667 a 670 b 675 a 678 a 680 a 682 a 682 i 688 a Thomas Brenndorfer Guelph Public Library
