Indexing is the process by which it is possible to classify documents, texts and others, using a controlled vocabulary (key terms that perfectly portray the subject of the writing), summaries and analysis. As for document indexing, it is the set of important data that facilitates the search or the safeguarding of a specific text, usually that has been published. It is distinguished by being used more often in the scientific field, so it is preferred to divide them according to the following pieces of information: author's name, publication title, year, publisher, country, as well as the name of the resource that It contains it (newspapers, magazines), if it exists.
Among the elements that can be found within the indexing process, there are: the indexer, a subject in charge of seriously carrying out the procedure, using the rules or policies that govern it; documents are those that seek to be classified in a system, for which an exhaustive review is carried out, managing to extract from them the appropriate information to be accessible to any search or storage thereof; Indexing rules and policies, are the different laws by which indexing is governed, to make it efficient; language Indexing, also known as controlled vocabulary, is about the selection of terms that relate to the content of the document, and that belong to a kind of organization of specific words.
It is important to note that the controlled vocabulary is divided, in turn, into three categories. The first one gives life to those that are arranged alphabetically, respecting the subject to which they refer. Keywords and descriptive phrases are also included. Likewise, the regulations of linguistics must be respected.