Created on Feb. 17, 2013, 12:10 a.m. by Hevok & updated by Hevok on May 2, 2013, 4:40 p.m.

The Designator in the Web- The Uniform Resource Identifier (URI) defines an extensible schema for worldwide unique identification of abstract or physical resources (RFC 3986).

The nice things about the human mind is that when talk about things humans take into account representations of this things and not the things necessary itself.

Humans share common concepts. On the basics of these common concepts humans are able to communicate, communicate information and to understand information. We need to identify things we are talking about. We need to find representations also in the Semantic Web.

If talking about a Object in the mind of human the Concept of this Object and all its all the general properties occur, i.e. all the properties common to all objects associated with a Concept. If dealing with things, human take into account the representation of these things and not the things itself.

Uniform means we can identify different types of resources and we have an identifier that is constructed according to a uniform schema. This means we can identify anything, any resource we can think of, can be identified via a uniform resource identifier. Of course this identifier must be used to distinguish one resource from another resource in a unique way.

  • Uniform - different types of resource identifiers all constructed according to a uniform schema
  • Resource - whatever may be identified via URI
  • Identifier - to distinguish one resource

What you can identify with and URI is a resource of any kind. The concept of the URI is established in the web via the URL, the Uniform Resource Locater, which is an address of an document in the web or with persistent resource names or persistent URLs. Books are idenfid via ISB and ISS number. Things the web can also generally be identified with a DOI.

  • Resource can be every object with a clear identity (according to the Context of the Application)

    • as e.g. Web pages, books, locations, persons, Relations among objects, Abstract Concepts, etc.
  • The Concept of URI is already established in various domains as e.g.,

    • the Web (URL, PRN, pURL),
    • Books and publications (ISBN, ISSN),
    • Digital Object Identifier (DOI),

The differences between URI and URL are:

  • URI combines URL and URN
  • URL only denotes the location of a resource
  • URIs also exist outside the Web for real world Objects.

Tags: identification, uniqueness, identifier, resource
Parent: Web
Children: Dereferencable, Resource and Representation, Uniform Resource Identifier, URI - Generic Synthax, URIs in the Semantic Web

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