Showing posts with label Library Metadata. Show all posts
Showing posts with label Library Metadata. Show all posts
Wednesday, 2 July 2025
Tuesday, 1 July 2025
AACR – Anglo-American Cataloguing Rule
AACR, or Anglo-American Cataloguing Rules, is a foundational cataloguing standard used by libraries around the world, especially in English-speaking countries. It provides detailed rules for the descriptive cataloguing of library materials and ensures uniformity across catalog entries.
📚 History and Versions
| Version | Year | Notes |
|---|---|---|
| AACR | 1967 | First edition, US-UK collaboration |
| AACR2 | 1978 | Widely adopted, structured around material type |
| AACR2R | 2002 | Revised version to address electronic resources |
| Replaced by | RDA | Resource Description and Access (2010 onwards) |
🔍 Key Features of AACR2
- Guidelines for cataloguing books, serials, AV materials, maps, and digital content
- Uses ISBD punctuation for bibliographic consistency
- Focuses on card catalog structure but adaptable to MARC21 and OPAC systems
- Separates description and entry elements
🔁 AACR2 vs RDA – Key Differences
| Aspect | AACR2 | RDA |
|---|---|---|
| Development Basis | ISBD and the card catalog model | Based on FRBR & FRAD models |
| Resource Types | Format-based | Content-based, flexible for digital |
| Data Entry | Cataloger’s judgment-based | Structured metadata for interoperability |
| Used For | Print & early digital | Digital, linked data, web applications |
✅ Why AACR Still Matters
- Foundation of modern cataloguing education
- Still in use where RDA is not adopted
- Core part of UGC NET, KVS, DSSSB, LIS syllabi
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