PPT Slide

Information Retrieval Techniques

• Metadata-based search using RDF (Resource Description Framework)

Problem: No reliable method for finding out relevant document without

accessing each one individually

Solution: WWW Consortium has introduced RDF in order to produce

standard language

Automatic metadata generation (according to Dewey Decimal Classification)

that classifies HTML documents

Two types:

- basic type - similar to the system used in libraries with predefined set of

attributes (e.g. author, title, ISBN)

- intelligent type - deduce information from semantic network

Disadvantage: RDF is not obligatory

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