CONCEPT FOR A STANDARD THESAURUS IN THE F IELD OF ORGANIC FARMING

Assigning keywords with the help of a (poly)hierarchically structured thesaurus includes a series of advantages compared to using free keywo rds. A disadvantage of a thesaurus, however, is the effort of its desi gn, construction and maintenance demand. A standard thesaurus, which i s modified by the user to fulfill his own requirements, can be a way t o profit from the advantages of a thesaurus without making the full ef fort of thesaurus construction. Design, construction and contents of a standard thesaurus in the field of organic farming are presented here . The comparison with the widely used keyword list AGROVOC demonstrate s the standard thesaurus' superiority in relation to assigning correct keywords.