HOME

TheInfoList




In
information system An information system (IS) is a formal, sociotechnical, organizational system designed to collect, process, information storage, store, and information distribution, distribute information. From a sociotechnical perspective, information systems ar ...
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 fe ...
,
digital image A digital image is an image An image (from la, imago) is an artifact that depicts visual perception Visual perception is the ability to interpret the surrounding environment (biophysical), environment through photopic vision (day ...
, database record, or
computer file A computer file is a computer resource for recording data Data (; ) are individual facts, statistics, or items of information, often numeric. In a more technical sense, data are a set of values of qualitative property, qualitative or quant ...
). This kind of
metadata Metadata is "data Data (; ) are individual facts, statistics, or items of information, often numeric. In a more technical sense, data are a set of values of qualitative property, qualitative or quantity, quantitative variable (research), v ...

metadata
helps describe an item and allows it to be found again by browsing or searching. Tags are generally chosen informally and personally by the item's creator or by its viewer, depending on the system, although they may also be chosen from a
controlled vocabulary Controlled vocabularies provide a way to organize knowledge for subsequent retrieval. They are used in subject indexing Subject indexing is the act of describing or classifying a document A document is a written Writing is a medium of ...
. Tagging was popularized by
website A website (also written as web site) is a collection of 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. Hyperte ...

website
s associated with
Web 2.0 Web 2.0 (also known as participative (or participatory) web and social web) refers to website A website (also written as web site) is a collection of web page A web page (or webpage) is a hypertext Hypertext is text display ...

Web 2.0
and is an important feature of many Web 2.0 services. It is now also part of other
database system In computing, a database is an organized collection of Data (computing), data stored and accessed electronically from a computer system. Where databases are more complex they are often developed using formal #Design and modeling, design and mode ...

database system
s,
desktop application Application software (app for short) is computing software designed to carry out a specific task other than one relating to the operation of the computer itself, typically to be used by end-users. Examples of an application Application may refer ...
s, and
operating system An operating system (OS) is system software System software is software designed to provide a platform for other software. Examples of system software include operating systems (OS) like macOS, Linux, Android (operating system), Android and Mi ...

operating system
s.


Overview

People use tags to aid
classification Classification is a process related to categorization Categorization is the human ability and activity of recognizing shared features or similarities between the elements of the experience Experience refers to conscious , an English Paracels ...
, mark ownership, note boundaries, and indicate
online identity Internet identity (IID), also online identity or internet persona, is a social identity Identity is the qualities, beliefs, personality, looks and/or expressions that make a person (self-identity One's self-concept (also called self-cons ...
. Tags may take the form of words, images, or other identifying marks. An analogous example of tags in the physical world is
museum A museum ( ; plural museums or, rarely, musea) is a building or institution that cares for and displays a collection Collection or Collections may refer to: * Cash collection, the function of an accounts receivable department * Collec ...

museum
object tagging. People were using textual keywords to classify information and objects long before computers. Computer based
search algorithm In computer science, a search algorithm is an algorithm (typically involving a multitude of other, more specific algorithms ) which solves a search problem. Search algorithms work to retrieve information stored within some data structure, or calc ...
s made the use of such keywords a rapid way of exploring records. Tagging gained popularity due to the growth of
social bookmarking Social bookmarking is an online service which allows users to add, annotate, edit, and share Internet bookmark, bookmarks of web documents. Many online bookmark management services have launched since 1996; Delicious (website), Delicious, founded i ...
,
image sharing Image sharing, or photo sharing, is the publishing or transfer of digital photos online. Image sharing websites offer services such as uploading, hosting, managing and sharing of photos (publicly or privately). This function is provided through ...
, and
social networking A social networking service or SNS (sometimes called a social networking site) is an online platform which people use to build social networks or social relation In social science, a social relation or social interaction is any relationship ...
websites. These sites allow users to create and manage labels (or "tags") that categorize content using simple keywords. Websites that include tags often display collections of tags as
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 wor ...
s,For example,
Blogger A blog (a Clipping (morphology), truncation of "weblog") is a discussion or informational website published on the World Wide Web consisting of discrete, often informal diary-style text entries (posts). Posts are typically displayed in Reverse ...

Blogger
and
WordPress WordPress (WP, WordPress.org) is a free and open-source Free and open-source software (FOSS) is software that is both free software and open-source software where anyone is free software license, freely licensed to use, copy, study, and c ...

WordPress
can display tag clouds.
as do some desktop applications.For example: Leap is a
macOS macOS (; previously Mac OS X and later OS X) is a proprietary {{Short pages monitor