Terms: Subject Categorization (810), Judith R. Ahronheim (173), electronic resources (4820000),
Terms: metadata (18000000), subjects (255000000), subject heading (2580000), subject headings (8380000), query language (1910000), query languages (442000),
Terms: structured query language (635000), query language processors (34), query language processors (34), object query languages (544), query-by-example (147000), xml query languages (14500), rdf query languages (2860), xml query language (143000),
Terms: query standards (544), query standardization (39), query optimization (356000), database query languages (36400),