So we can add risk capital or risk to our list of keywords. Although keywords are really useful, they are not the end of the story. Library catalogues, printed reference sources, and many searchable electronic resources also use controlled vocabularies . These are usually lists of standard subject terms. Controlled vocabularies are called different things.
Library catalogues refer to controlled vocabularies as subject headings .
Electronic databases and printed reference works often call them subject descriptors or identifiers . Most electronic indexes or databases allow you to search using your own keywords or by subject using the database's controlled vocabulary. Similar strategies can be used to search printed indexes, although the use of different keywords takes longer, as you can't just type them all in at the same time on a single search screen. Instead, you need to look through the index and check which words give you the desired results. Summary This page examined the use of the importance of choosing the right keywords for your search strategy choosing alternative keywords making use of controlled vocabularies.