5. Assessment and updating

5.1 Types and methods of assessment

The structural evaluation aims to confirm that the lexicon terms and the thesaurus structure conform to standards. This objective evaluation must be complemented by a more subjective assessment of the thesaurus' effectiveness as a research aid. Comparative evaluation involves comparing several thesauri (or a thesaurus and other types of document language) describing the same semantic field.

The evaluation of the thesaurus used for indexing in a specific document environment is closely linked to that of the indexing...