Tag (metadata)
A day [ daily ] (german label, time, labeller, trailer ) is a markup of a data set with additional information.
Markup languages
In markup languages (English mark-up languages) such as SGML, XML, or HTML tags denote the enclosed in angle brackets abbreviations that are used for example in HTML to excel text elements, or to classify in XML to data and structure. So-called opening and closing tags are used. The latter are characterized by a leading slash. Tags can be construed as named parentheses.
Analogous to the correct bracketing arithmetic expressions tags can only occur in pairs.
In this way they produce a tree structure.
In HTML, there are still historic exceptions that are not allowed in XHTML.
However, an empty element
In the HTML syntax, for example, means the award
text < / p >, so that the combined text is highlighted as a separate paragraph; most of the HTML renderer set this text section then dar. with a newline at the end of the passage
Tags can contain, as in the following example, the respective languages attributes:
Name = Doe first name = Max number = 12345 file Formats
In storing data files referred to as " tag", a meta- or additional information which is added to the file. In addition to the data to be stored in addition information is stored, for example, about their origin or purpose.
- The ID3 tag about offers information about its title, genre, artist, and other music files in.
- A file format for image data, based on the use of tags for storing information, the Tagged Image File Format (TIFF).
- For additional award of any data, mainly pics there Exif.
See also: Tag Editor
Object-Oriented Programming
In object-oriented programming " day " is used colloquially and has no precise definition. It describes an attribute or data field, which is held ready for various purposes either, but is not necessarily used, or assuming a similar function as in XML, and is used to classify program objects or internal ready hold additional data. In the latter case as a term often used interchangeably to flag remains the attribute for a user or the programmer, the prefabricated classes used hidden.
In the Object Pascal variants Delphi and Kylix about all classes have an integer field "tag", which is not set by default and allows the programmer, there caching additional information.
Under AmigaOS BOOPSI so-called day - lists used for parameter passing.
Version Management
In version control systems one days, the mark of a set of files from which you can restore a specific version at any time.
Information Architecture
In Webdesign tagging is a technique that allows each visitor to hang Paused at the sites visited ( the texts are quasi labeled ). This article in different subject areas can sort the same time; the rigid hierarchy of conventional navigation headings is thus supplemented or replaced.
Networks
On computer networks, tags can be used to match packets in a VLAN network divided by the individual VLAN segments or to mark packets for prioritization according to traffic classes ( Quality of Service).
Other uses
The fachsprachlich inaccurate use of the word can encompass other areas. Allen uses have in common is that they are very closely aligned to the literal meaning of the English word, so a day over a ( abstract ) label or labels, a labeler or whatsoever marking means.