Info URI scheme

In computer science, info: is a Uniform Resource Identifier (URI) scheme for information assets with identifiers in public namespaces that allows legacy namespaces such as Library of Congress Identifiers and Digital object identifiers to be represented as URIs. It acts as a bridging mechanism for older information identifiers to be used in the more generalised and standard URI allocation.

Specifications

Syntactical specifications

The URI specifications defined by the Internet Engineering Task Force (IETF) separates the info URI scheme’s syntax into two sections: part A, which contains syntactical elements specific to the info scheme, and part B, which follows standard URI definitions. The important info scheme‐specific Part A uses the following URI components:

Other specifications

The info URI scheme supports hierarchical processing with a forward slash character ‘/’ (also commonly seen in Uniform Resource Locators), although the character should not be treated as a strict hierarchical delimiter. Its scheme-specific part is an auto-identifier, which is constructed by appending an “identifier” component to a “namespace” component separated by a forward slash.

Uniform Resource Identifier

In information technology, a Uniform Resource Identifier (URI) is a string of characters used to identify a resource. Such identification enables interaction with representations of the resource over a network, typically the World Wide Web, using specific protocols. Schemes specifying a concrete syntax and associated protocols define each URI. The most common form of URI is the Uniform Resource Locator (URL), frequently referred to informally as a web address. More rarely seen in usage is the Uniform Resource Name (URN), which was designed to complement URLs by providing a mechanism for the identification of resources in particular namespaces.

Relationships among URIs, URLs, and URNs

A Uniform Resource Name (URN) functions like a person's name, while a Uniform Resource Locator (URL) resembles that person's street address. In other words: the URN defines an item's identity, while the URL provides a method for finding it.

URLs

A URL is a URI that, in addition to identifying a web resource, specifies the means of acting upon or obtaining the representation of it, i.e. specifying both its primary access mechanism and network location. For example, the URL http://example.org/wiki/Main_Page refers to a resource identified as /wiki/Main_Page whose representation, in the form of HTML and related code, is obtainable via HyperText Transfer Protocol (http) from a network host whose domain name is example.org.