RDA, or Resource Description and Access, is a cataloging standard which is replacing AACR2. With the exceptions of local practices outlined within this wiki, including our RDA Policy Statements, we catalog according to national practice, which currently allows following either AACR2 or RDA; and we do full level cataloging, as defined in OCLC's Bibliographic Formats and Standards.
How to recognize an RDA record in OCLC
Fixed field, description code is
040 includes ‡e rda.
There are no abbreviations in non-transcribed fields, and any abbreviations in transcribed fields are found that way on the original item.
The 245 lacks a GMD.
The publication information is in field 264 rather than 260.
There are additional fields present to represent the concepts that are in the GMD under AACR2.
336 - rdacontent
337 - rdamedia
338 - rdacarrier
(Note that the presence of 336, 337, and 338 fields alone does not indicate that a record is an RDA record, as these may legitimately be added to records that are otherwise cataloged according to AACR2.)
What to do with RDA records
In WorldCat, nothing special.
In CCS, review them to the best of your ability, utilizing the RDA toolkit. Add the GMD (|h) and qualifier to appropriate records. Use the authorized form of names found in the OCLC authority file.
How to recognize RDA-AACR2 hybrid records
It is appropriate for AACR2 records to contain any or all of the following RDA-based content:
- Addition of ‡e relator terms to access points
- Spelling out non-transcribed abbreviations
- Adding complete statements of responsibility instead of using "[et al.]"
- Adding 336, 337, and 338 fields
These are the most common indications that a record may be an inappropriate hybrid of AACR2 and RDA rules:
- If the fixed field, Description code is "a" on a record that contains
040 ‡e rda.
- In the fixed field, Description code is "i" on a record that lacks
040 ‡e rda.
- If 040
‡e rdais present in record that contains abbreviations, uses "[et al.]" for statements of responsibility, or lacks 336, 337, and 338 fields
- If an RDA record has a GMD.
- If an AACR2 record lacks a GMD.
What to do with RDA-AACR hybrid records
For appropriate hybrid records, leave as is, whether in CCS or in WorldCat.
For inappropriate hybrid records in WorldCat, either correct & upgrade it to a full RDA record, or submit an error report for the record.
For inappropriate hybrid records in CCS, check to see whether the record has been fixed in WorldCat. If not, either correct it in WorldCat and then overlay the local record, or fix the local record so that it is internally consistent.
Merging duplicate records
When there are duplicate records in the CCS database, and at least one is cataloged according to RDA, prefer the better, more complete record. If the preferred record is not an RDA record, at a minimum, please make the record an AACR2-RDA hybrid and add the RDA 33X & 34X fields to the preferred record.