- Extent of metadata use in the future? (Prevalence of content-based retrieval)
- Kinds of metadata in future information environments?
- Who will create and manage?
- Value given to such data?
- Sharing of metadata across systems?
- Standardisation of metadata?
1) Computer use to analyse content of resource re. relevance to user need. Bypassing metadata
2) Web 2.0: Provision of metadata by end users, contributors, and authors
3) Traditional approach: organisation and description by information professionals
Approach reflective of varying perspectives on the nature of the info resources:
- Resource contains a message viewed objectively (no reference to creator or end-user) Content-based retrieval systems
- Resource analysed according to intended (creator) meaning Metadata from authors and publishers
- Resource analysed according to its utility User-generated metadata
Any of the 3 may be adopted by info professionals.
Ideally creating a “bridge” between user and user – addressing gaps perhaps in both user and author understanding of the resource
Information retirieval – computer processing content focus whilst info organisation has developed tools/standards with reference to content and carriers, authiors and users
Info organisation traditions prior to ‘info retrieval’ mentality:
1) Library cataloguing (collection and warrant focus) eg. products – AACR, LCSH
2) ‘Documentation’ tradition (vocabularies combining literary and user warrant) eg. products – UDC (Universal Decimal Classification), thesaurofacet
- Merging of these traditions evident
Content-based information retrieval
- Need to consider benefits for ease of use (eg. Google and other search engines) in comparison to traditional approaches
- Is metadata even useful anymore? Development of content searching…
- Under ‘Google- like’ search engines however, metadata is still important but always?
- Computers can process lots thorouighly, consistently and rapidly
- Computer often retrieve the actual resource itself, cost less than info professionals, scalable and accommodating of additional resources
- Keyword searching producing results equal or better than those based on metadata/controlled vocab.
- Only so much a computer can do however
- Content-based systems difficulty with verbal info.
- Content-based less effective if user is unsure of their informational need
- Problems too automatic summarisation
- Very little evidence that computers can out perform in intellectual task contexts eg. indexing, abstracting, thesaurus construction, creation of search strategies
- Computers not able to create structured overviews of collections
- Content-based retrieval systems good at finding and obtaining but not selecting and navigating
- Computers can not draw on external world knowledge – unable to build logical knowledge structures