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bestpay

M¢25 Funded By Mahalo ? | August 14, 2009 08:39 PM

OK, Internet question! What are URI, URN and URL's? What are the differences between them?

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googamooga

August 14, 2009 10:21 PM | view on twitter

URI = Uniform Resource Identifier is a string of characters that identify or name a resource on the Internet.

URN = Uniform Resource Names are URI's that are used for identification. Think of them as the title of a store.

URL = Uniform Resource Locator is a URI that specifies where a resource is and a way to retrieving it. Think of URL s as directions to find the store.

Differences, URI is the scheme that URN and URL make up. URN is like the name of something, and a URL is how you find it.
Source(s):
http://en.wikipedia.org/wiki/Uniform_Resource_Identifier
http://en.wikipedia.org/wiki/Uniform_Resource_Name
http://en.wikipedia.org/wiki/Uniform_Resource_Locator

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socalsue

August 14, 2009 10:40 PM | view on twitter

I'm seeing the term URI much more in newer books and papers regarding the Semantic Web, so I have been trying to gain a better understanding of the standards. A link for the official W3C report follows.

In the simpilest terms, I see it as this:
How/Where:Uniform Resource Locator(URL) http://www.mahalo.com
What:Uniform Resource Name(URN) index.htm
How/WhereWhat: Uniform Resource Identifier(URI) http://www.mahalo.com/index.htm/

Now this is way over simplification. We can refer to many more services than http, many more locations than top level domain and many more resources than html pages. Semantic web pulls in lots of namespaces. So the use of URI's is heavy.

I will continue to read until I develop a better understanding of the RFC's.
Source(s):
http://www.w3.org/TR/uri-clarification/

Tags: url, urn, w3c, uri

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