Elementos sobre indización y búsqueda de la información por medio de vocabularios controlados en bases de datos biomédicas

from the perspective of the literacy and search of the information, there is an urgent need of know some basic elements on the indexing and retrieval of the information before to introduce students in the information search in the databases offering the chance to explore the collections by means of controlled vocabularies. indexing and search of information is defined, its elements, notions and significance are exposed and mesh thesaurus is studied and its spanish version. the knowledge of some theoretical and practical elements on the indexing and retrieval of information is a significant step in the appropriate understanding of the activity of search in bibliographic databases using controlled vocabularies.