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・ Link Lending Ltd v Bustard
・ Link level
・ Link Light Rail
・ Link Lock
・ Link margin
・ Link Mobility Group
・ Link page
・ Link Piano and Organ Company
・ Link prefetching
・ Link protection
・ Link quality analysis
・ Link Quality Report
・ Link rat
・ Link register
・ Link REIT
Link relation
・ Link River
・ Link River Dam
・ Link road
・ Link Road, Cuttack
・ Link rot
・ Link Stack
・ Link state packet
・ Link time
・ Link Tochigi Brex
・ Link Top
・ LINK Train
・ Link Trainer
・ Link Trainer Building
・ Link TV


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Link relation : ウィキペディア英語版
Link relation

A link relation is a descriptive attribute attached to a hyperlink in order to define the type of the link, or the relationship between the source and destination resources. The attribute can be used by automated systems, or can be presented to a user in a different way.
In HTML these are designated with the rel attribute on link, a, or area elements. Example uses include the standard way of referencing CSS , which indicates that the external resource linked to with the href attribute is a stylesheet, so a web browser will generally fetch this file to render the page. Another example is rel="shortcut icon" for the popular favicon icon.
Link relations are used in some microformats (e.g. rel="tag" for tagging), in XHTML Friends Network (XFN), and in the Atom standard, in XLink, as well as in HTML. Standardized link relations are one of the foundations of HATEOAS as they allow the user agent to understand the meaning of the available state transitions in a REST system.
The Internet Engineering Task Force (IETF) has a registry of standardized link relations,〔(IANA link relations registry )〕 and a procedure for extending it defined in RFC 5988. HTML 5 also defines valid link relations.〔(HTML Living Standard; 4.12.4 Link types ) Web Hypertext Application Technology Working Group〕
In HTML 4, the rev attribute of a link is also defined, which defines the reversed relationship between the resources. The attribute is removed in HTML 5.
== Semantic Web Implementation ==

The RDF typed links are fundamental in LOD datasets for identifying the relationship (predicate) type of RDF triples, contributing to the automatic processability of machine-readable statements of the Giant Global Graph on the Semantic Web. The typed links in RDF are expressed as the value of the rdf:type property, defining the relationship type using well-established controlled vocabulary terms or definitions from LOD datasets such as




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