What is a controlled vocabulary?

vocabulary is a concept in computer science and computer programming that includes the use of previously agreed or approved conditions in creating relational databases, searchable metadata or other systems in which human words are used to indicate information for later search. The methodology of using the controlled vocabulary to classify information is in direct contrast to the concept of vocabulary of natural language, in which there are no agreed conditions and all words used are instead connected by weighted relationships. In addition to the highest levels used in the controlled vocabulary, the support words can be used, so synonyms or other terms that are strongly associated with the top level of the highest level can cause the use of the highest level. The main differences that are measured between natural language systems and controlled verbal systems are the importance of inquiry results by means of words, volume of returned information, and system.System. Search terms in the Internet search engine, company information database and even digital research library are examples of applications that can be categorized with metadata conditions unlike strict hierarchical structure. The words used to describe the object in such situations create a type of searchable index of a larger group of information.

One example of the use of the controlled vocabulary can be seen when considering the company's administration system. The files must be categorized in a way to make them easy and predictable. If one file is engaged in cars, it could be filed in the category of "car". Another person should also have a file deals with cars, without controlled vocabulary, the file can be placed under the title "cars", making it difficult to find two files with a single search. When categories are checked, then all files zab wouldThe cars were placed under a single agreed direction.

The advantage of using the controlled vocabulary is that the information is strictly described in a predictable way. This means that anyone who is aware of vocabulary will be able to find information efficiently and accurately. However, the complication of vocabulary is that search terms are more difficult, not if impossible, generate automatically and usually require some human intervention, which is a big task to convert existing databases for using controlled vocabulary. If the vocabulary is not large enough, then there is also a possibility that the only question that raises such a large volume of information that it is impractical to sort without the use of another qmetod of urying.