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The base URI can be obtained, in order of precedence, from: [13]: §5.1 the reference URI itself if it is a URI; the content of the representation; the entity encapsulating the representation; the URI used for the actual retrieval of the representation; the context of the application. Within a representation with a well defined base URI of
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 URIs that launch a mobile app: twitter:// is the iOS URI to launch Twitter's mobile app; YouTube:// is the iOS URI to launch YouTube's mobile app; The format of the URI used to trigger or deep link an app is often different depending on the mobile operating system.
URI = scheme ":" ["//" authority] path ["?" query] ["#" fragment] A component is undefined if it has an associated delimiter and the delimiter does not appear in the URI; the scheme and path components are always defined. [13]: §5.2.1 A component is empty if it has no characters; the scheme component is always non-empty. [13]: §3
Android has a growing selection of third-party applications, which can be acquired by users by downloading and installing the application's APK (Android application package) file, or by downloading them using an application store program that allows users to install, update, and remove applications from their devices.
The minimal data URI is data:,, consisting of the scheme, no media-type, and zero-length data. Thus, within the overall URI syntax, a data URI consists of a scheme and a path, with no authority part, query string, or fragment. The optional media type, the optional base64 indicator, and the data are all parts of the URI path.
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 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]