Metadata

thumb|A post (tweet) on the social network X (social network)|X (Twitter) with several hashtags colored in blue text. A hashtag is a metadata tag operator that is prefaced by the hash symbol, #. On social media, hashtags are used on microblogging and photo-sharing services–especially Twitter and Tumblr–as a form of user-generated tagging that enables cross-referencing of content by topic or theme. For example, a search within Instagram for the hashtag #flowers returns all posts that have been tagged with that term. After the initial hash symbol, a hashtag may include letters, numerals or other

thumb|In the 21st century, metadata typically refers to digital forms, but traditional card catalogs contain metadata, with cards holding information about books in a library (author, title, subject, etc.).

suffix to the name of a computer file

data model for describing resources on the Web

metadata used for classifications or adding of informations

thumb|alt=A German license plate with the value "TZ 66H" is mounted on the rear of a car|Vehicle registration plate|Registration plates are used to display identifiers for motor vehicles.

Folksonomy is a classification system in which end users apply public tags to online items, typically to make those items easier for themselves or others to find later. Over time, this can give rise to a classification system based on those tags and how often they are applied or searched for, in contrast to a taxonomic classification designed by the owners of the content and specified when it is published. This practice is also known as collaborative tagging, social classification, social indexing, and social tagging. Folksonomy was originally "the result of personal free tagging of informatio

Exchangeable image file format (officially Exif, according to JEIDA/JEITA/CIPA specifications) is a standard that specifies formats for images, sound, and ancillary tags used by digital cameras (including smartphones), scanners and other systems handling image and sound files recorded by digital cameras. The specification uses the following existing encoding formats with the addition of specific metadata tags: JPEG lossy coding for compressed image files, TIFF Rev. 6.0 (RGB or YCbCr) for uncompressed image files, and RIFF WAV for audio files (linear PCM or ITU-T G.711 μ-law PCM for uncompresse

text placed at the bottom of a page or at the end of a chapter

explanatory note in the source code of a computer program, skipped during its compilation or interpretation and without effect on execution

two-part identifier for file formats and format contents transmitted on the Internet

system of descriptive information for an arrangement or division of objects into groups based on characteristics, which the objects have in common

KulturNav is a Norwegian cloud-based software service, allowing users to create, manage and distribute name authorities and terminology, focusing on the needs of museums and other cultural heritage institutions. The software is developed by KulturIT ANS and the development project is funded by the Arts Council Norway.

human-readable standard for description of bibliographic resources

right|frame|In this example, the data of file B is transcluded into the document A.

file manager and media organizer specialized for artist and creative content authors

set of metadata that contains definitions and representations of data elements

ISO standard

protocol to harvest metadata

consortium of the world's major news agencies and news industry vendors

The MPEG-21 standard, from the Moving Picture Experts Group, aims at defining an open framework for multimedia applications. MPEG-21 is ratified in the standards ISO/IEC 21000 - Multimedia framework (MPEG-21).

standard for descriptive cataloging providing instructions and guidelines on formulating bibliographic data

file format

CD-Text is an extension of the Red Book Compact Disc specifications standard for audio CDs. It allows storage of additional information (e.g. album name, song name, and artist name) on a standards-compliant audio CD.

string used to identify file types on Apple subsystems

privacy protecting software

A FourCC ("four-character code") is a sequence of four bytes (typically ASCII) used to uniquely identify data formats. It originated from the OSType or ResType metadata system used in classic Mac OS and was adopted for the Amiga/Electronic Arts Interchange File Format and derivatives. The idea was later reused to identify compressed data types in QuickTime and DirectShow.

data model

object in a filesystem marked to not be displayed by default

Set of file system features

library cataloging standard

atomic unit of data that has precise meaning or precise semantics

A triplestore or RDF store is a purpose-built database for the storage and retrieval of triples through semantic queries. A triple is a data entity composed of subject–predicate–object, like "Bob is 35" (i.e., Bob's age measured in years is 35) or "Bob knows Fred".

'BacDive (The Bacterial Diversity Database') is the worldwide largest database for standardized bacterial and archaeal strain-level information.

MediaInfo is a cross-platform, free and open source program that displays technical information about media files, as well as tag information for many audio and video files. It is used in many programs such as XMedia Recode, MediaCoder, eMule, and K-Lite Codec Pack. It can be easily integrated into any program using a supplied . MediaInfo supports popular video formats (e.g. Matroska, WebM, AVI, WMV, QuickTime, Real, DivX, XviD) as well as lesser known or emerging formats. In 2012 MediaInfo 0.7.57 was also distributed in the PortableApps format.

token used to name an entity in a computer language

metadata format used in some types of image files

open XML-based language

object identifiers used in galleries, libraries, archives, and museums

International Standard Archival Authority Record

international standard for metadata to support the preservation of digital objects

right|thumb|400px|A scanned image of Keykode from a piece of unexposed, developed 35 mm movie film|35 mm [[Eastman Kodak motion picture color negative. All of these slices are from the same side of the same piece of negative, cropped and stacked for simplicity. (A) Human-readable Keykode number (the number to the far right advances by one for each 16 frames of 35 mm film or 20 frames of 16 mm film). Next to that is the same information in USS-128 Barcode machine-readable language. (B) Further down the film (within the 16 frames) is the film identifier information and date symbol (C) Other-use

Metadata container

metadata container

person responsible for the management and fitness of data elements - both the content and metadata , which ensure the quality of the data and its compliance with various types of regulatory, academic and international requirements

database of educational and research organizations

community-led database of research organizations maintained by the ROR community

N-Triples is a format for storing and transmitting data. It is a line-based, plain text serialisation format for RDF (Resource Description Framework) graphs, and a subset of the Turtle (Terse RDF Triple Language) format. N-Triples should not be confused with Notation3 which is a superset of Turtle. N-Triples was primarily developed by Dave Beckett at the University of Bristol and Art Barstow at the World Wide Web Consortium (W3C).

assignment of a file type to be opened with a specific software application

structure that categorizes facts and measures in a data warehouse