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Index Term
An index term, subject term, subject heading, descriptor, or keyword, in information retrieval Information retrieval (IR) in computing Computing is any goal-oriented activity requiring, benefiting from, or creating computing machinery. It includes the study and experimentation of algorithmic processes and development of both computer h ..., is a term that captures the essence of the topic of a document. Index terms make up a controlled vocabulary Controlled vocabularies provide a way to organize knowledge for subsequent retrieval. They are used in subject indexing schemes, subject headings, thesaurus (information retrieval), thesauri, Taxonomy (general), taxonomies and other knowledge orga ... for use in bibliographic recordA bibliographic record is an entry in a bibliographic index (or a library catalog) which represents and describes a specific resource. A bibliographic record contains the data elements necessary to help users identify and retrieve that resource, as w ...s. ...
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Information Retrieval
Information retrieval (IR) in computing Computing is any goal-oriented activity requiring, benefiting from, or creating computing machinery. It includes the study and experimentation of algorithmic processes and development of both computer hardware , hardware and software. It has sci ... and information science Information science (also known as information studies) is an academic field which is primarily concerned with analysis, collection, classification Classification is a process related to categorization Categorization is the human ability a ... is the process of obtaining information system An information system (IS) is a formal, sociotechnical Sociotechnical systems (STS) in organizational development is an approach to complex organizational work design that recognizes the interaction between people and technology in wiktionary:Wor ... resources that are relevant to an information need from a collection of those resources. Searches can be based on full-te ...
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Boolean Algebra
In mathematics Mathematics (from Greek: ) includes the study of such topics as numbers (arithmetic and number theory), formulas and related structures (algebra), shapes and spaces in which they are contained (geometry), and quantities and their changes (cal ... and mathematical logic Mathematical logic is the study of formal logic within mathematics. Major subareas include model theory, proof theory, set theory, and recursion theory. Research in mathematical logic commonly addresses the mathematical properties of formal sys ..., Boolean algebra is the branch of algebra Algebra (from ar, الجبر, lit=reunion of broken parts, bonesetting, translit=al-jabr) is one of the areas of mathematics, broad areas of mathematics, together with number theory, geometry and mathematical analysis, analysis. In its most ge ... in which the values of the variables are the truth value In logic and mathematics, a truth value, sometimes called a logical value, is a value indicat ...
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Tag Cloud
A tag cloud (also known as a word cloud, wordle or weighted list in visual design) is a visual representation of text data, which is often used to depict keyword metadata on websites, or to visualize free form text. Tags are usually single words, and the importance of each tag is shown with font size or color. When used as website navigation aids, the terms are hyperlinked to items associated with the tag. History In the language of visual design, a tag cloud (or word cloud) is one kind of "weighted list", as commonly used on geographic maps to represent the relative size of cities in terms of relative typeface size. An early printed example of a weighted list of English keywords was the "subconscious files" in Douglas Coupland Douglas Coupland (born 1961) is a Canadian novelist A novelist is an author or writer of novels, though often novelists also write in other genres of both fiction and non-fiction. Some novelists are professional novelists, thus make a living wage, . ...
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Tag (metadata)
In information system An information system (IS) is a formal, sociotechnical Sociotechnical systems (STS) in organizational development is an approach to complex organizational work design that recognizes the interaction between people and technology in wiktionary:Wor ...s, a tag is a keyword or term assigned to a piece of information (such as an Internet bookmark In the context of the World Wide Web, a bookmark is a Uniform Resource Identifier (URI) that is stored for later retrieval in any of various storage formats. All modern web browsers include Comparison of web browsers#Browser features, bookmark fea ..., digital image A digital image is an composed of s, also known as ''pixels'', each with ', ' of numeric representation for its or that is an output from its fed as input by its denoted with ''x'', ''y'' on the x-axis and y-axis, respectively. Depending on ..., database record, or computer file A computer file is a computer resource for recording data ...
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Subject (documents)
In library and information science Library and information science (LIS) (sometimes given as the plural library and information sciences) is a branch of academic disciplines that deal generally with organization, access, and collection of information, whether in physical (for example ... document A document is a writing, written, drawing, drawn, presented, or memorialized representation of thought, often the manifestation of nonfiction, non-fictional, as well as fictional, content. The word originates from the Latin ''Documentum'', whic ...s (such as books, articles and pictures) are classified and searched by subject – as well as by other attributes such as author, genre and document type. This makes "subject" a fundamental term in this field. Library and information specialists assign subject labels to documents to make them findable. There are many ways to do this and in general there is not always consensus about which subject should be assigned to a given document. To o ...
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Search Engine Optimization
Search engine optimization (SEO) is the process of improving the quality and quantity of website traffic to a website A website (also written as web site) is a collection of web page A web page (or webpage) is a hypertext File:Douglas Engelbart in 2008.jpg, Douglas Engelbart in 2009, at the 40th anniversary celebrations of "The Mother of All Demos" i ... or a web page A web page (or webpage) is a hypertext Hypertext is text displayed on a or other with references () to other text that the reader can immediately access. Hypertext documents are interconnected by hyperlinks, which are typically acti ... from search engine A search engine is a software system A software system is a system of intercommunicating software component, components based on forming part of a computer system (a combination of Computer hardware, hardware and software). It "consists of a n ...s. SEO targets unpaid traffic (known as "natural" or "organic Organic may refer t ...
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Keyword Density
Keyword density is the percentage of times a keyword or phrase appears on a web page compared to the total number of words on the page. In the context of search engine optimization Search engine optimization (SEO) is the process of improving the quality and quantity of website traffic to a website A website (also written as web site) is a collection of web page A web page (or webpage) is a hypertext File:D ..., keyword density can be used to determine whether a web page is relevant to a specified keyword or keyword phrase. In the late 1990s, the early days of search engines A search engine is a software system that is designed to carry out web searches (Internet searches), which means to search the World Wide Web upright=1.35, A global map of the web index for countries in 2014 The World Wide Web (WWW), ..., keyword density was an important factor in page ranking. However, as webmasters A webmaster is a person responsible for maintaining on ...
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Index (publishing)
An '' 'index (plural: usually indexes, more rarely indices; see below) is a list of words or phrases ('headings') and associated pointers ('locators') to where useful material relating to that heading can be found in a document or collection of documents. Examples are an index in the back matter Book design is the art of incorporating the content, style, Word processor, format, design, and sequence of the various components and elements of a book into a coherent unit. In the words of renowned typographer Jan Tschichold (1902–1974), book d ... of a book A book is a medium for recording information Information is processed, organised and structured data. It provides context for data and enables decision making process. For example, a single customer’s sale at a restaurant is data – ... and an index that serves as a library catalog A library catalog (or library catalogue in British English) is a register of all bibliography, bibliographic items found in ...
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Dynamic Keyword Insertion
Dynamic keyword insertion is a feature provided by Google Ads, Microsoft adCenter and Yahoo! Search Marketing to dynamically insert a Index term, keyword that is most relevant to the ad to be displayed. It helps advertisers to use relevant keywords on their ads while making it easier for them to create unique ads for a large number of keywords. This way, including the user' search query within the ad and increasing the ad relevancy, might also have a positive impact on the click-trough rate and the quality score of the ad itself. For example: One user searches for "north carolina car insurance" and a second user searches for "maine car insurance". An advertiser bidding on car insurance keywords in both states can use dynamic keyword insertion to insert the user's state on-the-fly (see image to the right). There is an inherent danger of trademark violations when using Dynamic Keyword Insertion. See also * Google Ads * Microsoft Advertising * Pay-per-click * Cloaking * Index term ...
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Subject Headings Authority File
The or SWD (translated as ''Subject Headings Authority File'') is a controlled vocabulary index term system used primarily for subject indexing in library catalogs. The SWD is managed by the German National Library (DNB) in cooperation with various library networks. The inclusion of keywords in the SWD is defined by (RSWK) (English: Rules for the keyword catalogue). Similar authority control, authority systems in other languages include the Library of Congress Subject Headings (LCSH) and the (). Since April 2012 the SWD is part of the (GND) (English: Integrated Authority File). Scope The SWD has about 600,000 Index term, descriptors and 700,000 non-descriptors (synonyms and quasi-synonyms) as well as synonymous descriptor chains with references to a descriptor. Its growth rate is about 5.5% per year. About three-quarters of the descriptors refer to individual concepts (language identifier, person, entity, title, ethnography etc.) and a quarter are abstract concepts. Linking u ...
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Polythematic Structured Subject Heading System
Polythematic structured-subject heading system (abbreviated as PSH from the Czech language, Czech ''Polytematický Strukturovaný Heslář'') is a bilingual Czech–English controlled vocabulary of Index term, subject headings developed and maintained by the National Technical Library (the former State Technical Library) in Prague. It was designed for describing and searching information resources according to their subject. PSH contains more than 13,900 terms, which cover the main fields of human knowledge. Because of its release in Simple Knowledge Organization System, SKOS, PSH can be used not only for describing documents in a library, but also for Web indexing, indexing web pages. Everyone can use PSH for free. PSH is a part of the Linked Open Data cloud diagram (LOD cloud diagram). The image of the LOD cloud diagram shows datasets that have been published in Linked Data format, by contributors to the Linked Open Data community project and other individuals and organisations ...
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Medical Subject Headings
Medical Subject Headings (MeSH) is a comprehensive controlled vocabulary Controlled vocabularies provide a way to organize knowledge for subsequent retrieval. They are used in subject indexing schemes, subject headings, thesaurus (information retrieval), thesauri, Taxonomy (general), taxonomies and other knowledge orga ... for the purpose of indexing journal A journal, from the Old French ''journal'' (meaning "daily"), may refer to: *Bullet journal, a method of personal organizations *Diary, a record of what happened over the course of a day or other period *Daybook, also known as a general journal, a ... articles and books in the life sciences This list of life sciences comprises the branches of science The branches of science, also referred to as sciences, "scientific fields", or "scientific disciplines," are commonly divided into three major groups: *Formal sciences: the stu .... It serves as a thesaurus that facilitates searching. Created and updated by the Unit ...
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