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Subject indexing is the act of describing or classifying a document by index terms, keywords, or other symbols in order to indicate what different documents are about, to summarize their contents or to increase findability. In other words, it is about identifying and describing the subject of documents. Indexes are constructed, separately, on ...
Index terms can consist of a word, phrase, or alphanumerical term. They are created by analyzing the document either manually with subject indexing or automatically with automatic indexing or more sophisticated methods of keyword extraction. Index terms can either come from a controlled vocabulary or be freely assigned.
An Iranian index of academic journals and access to full text or metadata Free Scientific Information Database: SCIndeks - Serbian Citation Index: Multidisciplinary: 80,000 A bibliographic database, a national citation index, an Open Access full-text journal repository and an electronic publishing platform. Articles from >230 journals. Free
A bibliographic index is a bibliography intended to help find a publication. Citations are usually listed by author and subject in separate sections, or in a single alphabetical sequence under a system of authorized headings collectively known as controlled vocabulary, developed over time by the indexing service. [1]
The word indexing service is today mostly used for computer programs, but may also cover services providing back-of-the-book indexes, journal indexes, and related kinds of indexes. [ 2 ] An indexing and abstracting service is a service that provides shortening or summarizing of documents and assigning of descriptors for referencing documents.
Uniterm is a subject indexing system introduced by Mortimer Taube in 1951. The name is a contraction of "unit" and "term", referring to its use of single words as the basis of the index, the "uniterms". Taube referred to the overall concept as "Coordinate Indexing", but today the entire concept is generally referred to as Uniterm as well.
How data enters the index, or how words or subject features are added to the index during text corpus traversal, and whether multiple indexers can work asynchronously. The indexer must first check whether it is updating old content or adding new content. Traversal typically correlates to the data collection policy.
A citation index is a kind of bibliographic index, ... Several open-access, subject-specific citation indexing services also exist, such as: