CQL: the Contextual Query Language: Specifications (SRU: Search/Retrieval via URL, Standards, Library of Congress)
CQL, the Contextual Query Language, is a formal language for representing queries to information retrieval systems such as web indexes, bibliographic catalogs and museum collection information. The design objective is that queries be human readable and writable, and that the language be intuitive while maintaining the expressiveness of more complex languages.

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