Faceted boolean query

A faceted boolean query is a query of paranthetical OR statements linked together by AND boolean operators.

For example, the query (1 OR 2) AND (3 OR 4) would match any combination of either the numbers 1 or 2 and 3 or 4. The following sets of numbers would satisfy this: [1,3], [1,4], [2,3] and [2,4].

Faceted boolean querys are especially helpful in information retrieval such as search engine querying. For example, the following query will return many documents on the subject of electronic voting in general: "(electronic OR computerized OR DRE) AND (voting OR elections OR election OR balloting OR electoral)" External link to this query on Google.