Replenishment of content of the thesaurus as a tool for improving its retrieval possibilities

There are given the results of a scientific research on updating the information retrieval thesaurus in agriculture and food developed in the CSAL to provide precise displaying the content of documents during indexing, unified data representation, describing subject areas and improving the retrieval possibilities of the thesaurus. The main functions of the information retrieval thesaurus being the basic information retrieval language of the multitopical database AGROS are specified: capturing, normalizing and systemizing the lexis used in scientific literature; indexing documents and retrieval requests; providing harmonized, unified and formalized representation of information in the database and its products; ensuring the fullness and precision of subject search by software support of the hierarchic relations and synonymy relations; formal and logic control of the indexing terms of the database; function of a terminological reference book. The wording procedures for updating and including new terms into the thesaurus, establishing paradigmatic relations between lexical items and forming the hierarchical trees are described. More than 5300 lexical items have been modified (added, changed, and deleted) in 2019. New terms on plant protection, zoology, botany, agricultural engineering, AIC economy and animal husbandry were introduced. The new version of the information retrieval thesaurus contains 54394 lexical items. Of them 34869 are descriptors and 19525 are ascriptors. More than 21660 lexical items are scientific (Latin) names of organisms (1805 of them are new). 1617 terms having a synonym status were included; of them 1043 lexical items are scientific names of organisms. More than 2970 relations between the terms (hierarchic, synonymic, and associative) were added.

тезаурусы, информационно-поисковые языки, лингвистическое обеспечение, поиск информации, АПК, базы данных, ЦНСХБ, thesauruses, information retrieval languages, linguistic support, information search, AIC, databases, CSAL