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3.2.2: Boolean Text Retrieval

Attributes: occurrence of a term in the text of a document or in a specific part of a document

A term is defined as a sequence of characters with well defined boundaries.

Example: The reference Database document (fig. _1_ ) has various fields:

Boolean queries are formulated using field names and terms. Examples: author=smith, author: smith, smith in author ...

Attribute TIx:D->{0,1} : Term x appears in Title

Attribute AUx:D->{0,1} : Term x appears in Author

Attribute-value-pair for boolean search: (TIx,true)

Result set:

DTIx,true=TI-1x({true})={dD | Title of d contains x}


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