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The data URI scheme is a uniform resource identifier ... Examples of data URIs showing most of the features are: data:text/vnd-example+xyz;foo=bar;base64,R0lGODdh
A Uniform Resource Identifier helps identify a source without ambiguity. Many URI schemes are registered with the IANA; however, there exist many unofficial URI schemes as well. Mobile deep links are one example of a class of unofficial URI schemes that allow for linking directly to a specific location in a mobile app.
Examples of popular schemes include http, https, ftp, mailto, file, data and irc. URI schemes should be registered with the Internet Assigned Numbers Authority (IANA), although non-registered schemes are used in practice. [b] An optional authority component preceded by two slashes (//), comprising:
A Uniform Resource Name (URN) is a Uniform Resource Identifier (URI) that uses the urn scheme.URNs are globally unique persistent identifiers assigned within defined namespaces so they will be available for a long period of time, even after the resource which they identify ceases to exist or becomes unavailable. [1]
The Internationalized Resource Identifier (IRI) is an internet protocol standard which builds on the Uniform Resource Identifier (URI) protocol by greatly expanding the set of permitted characters. [ 1 ] [ 2 ] [ 3 ] It was defined by the Internet Engineering Task Force (IETF) in 2005 in RFC 3987.
Microsoft .NET (for example, the method new Uri(path)) generally uses the 2-slash form; Java (for example, the method new URI(path)) generally uses the 4-slash form. Either form allows the most common operations on URIs (resolving relative URIs, and dereferencing to obtain a connection to the remote file) to be used successfully.
A RDF description of a resource is a set of triples (subject, predicate, object), where subject represents the resource to be described, predicate a type of property relevant to this resource, and object can be data or another resource. The predicate itself is considered as a resource and identified by a URI.
An Identifiers.org URI is formed of several parts: Protocol. Identifiers.org URIs are HTTP URIs and start with "http:/" Data collection. These are namespaces listed in the MIRIAM Registry. For instance "pubmed" for the publication resource PubMed, "ec-code" for the enzyme nomenclature and "go" for gene ontology; Record in the collection.