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Questions tagged [urn]

In computing, a Uniform Resource Name (URN) is the historical name for a Uniform Resource Identifier (URI) that uses the urn scheme. A URI is a string of characters used to identify a name of a web resource. Such identification enables interaction with representations of the web resource over a network, typically the World Wide Web, using specific protocols.

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What is the difference between a URI, a URL and a URN?

People talk about URLs, URIs, and URNs as if they're different things, but they look the same to the naked eye. What are the distinguishable differences between them?
Sean McMains
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What is the difference between URI, URL and URN?

What's the difference between an URI, URL and URN? I have read a lot of sites (even Wikipedia) but I don't understand it. URI: http://www.foo.com/bar.html URL: http://www.foo.com/bar.html URN: bar.html Is this correct?
thom
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Why is URN one of more popular formats used to uniquely identify the resource?

I somewhat understand that URNs are used to provide unique and location independent name for the resource. Yet I fail to see their usefulness and how exactly they work: a) In order for URN to really be unique, there would have to be some central…
SourceC
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JAXB: How do I annotate classes so that they belong to different namespaces?

I want to have JAXB-annotated classes which would be marshalled/unmarshalled to different XML namespaces. What I need is something like: …
ivan_ivanovich_ivanoff
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Using DNS as a URN resolver

I'm looking to either find or build a URN (Universal Resource Name) resolver, which would return 0 or more URIs for a given URN. For example: urn:fooid:6e8bc430-9c3a-11d9-9669-0800200c9a66:foo might resolve to…
Chris Wenham
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Is there a list of URL schemes?

Is there a list of (all, non-custom) URL schemes? I thought that I just needed to search on google to find tons of answers, but it's probably wrong my (naive) question. If so, I will settle the (usual) most important: file://, ftp://, http://,…
Juri
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Is there known URI scheme or URN namespace for Unicode characters?

I need to reference to a Unicode character with a URI. Following IANA references list multiple schemes and namespaces but do not mention anything about identifiers for the Unicode characters. Does anyone know if something like this exists…
Akseli Palén
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Is there an official or de-facto common URN NID for private unregulated use?

I would like to use URNs in a project of mine. And I am hardly willing to apply my humble project for official IANA registration but would like to keep from violating standards if possible. That's why I'd like to know if there is a standard (or…
Ivan
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URN for MIME Type

Does an official URN for the MIME type exist? Mozilla Firefox and other applications use notations like "urn:mimetype:text/plain" or "urn:mimetype:handler:text/plain". There are two problems with this approach: No "mimetype" namespace exists…
MyKey_
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How do you resolve a URN?

I have an XML schema file which references a urn based location. Is there some way to resolve this into a url, or some way to actually read the file it refers to.
Colin
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How do I represent URNs (Uniform Resource Names) in .NET so that Equals works as expected

RFC2141 mentions: Examples of lexical equivalence The following URN comparisons highlight the lexical equivalence definitions: 1- URN:foo:a123,456 2- urn:foo:a123,456 3- urn:FOO:a123,456 4- urn:foo:A123,456 5- urn:foo:a123%2C456 …
Maximilian Machedon
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Do URIs which are neither URLs nor URNs exist?

Can a URI be neither a URL nor a URN? Over the Internet, there are a lot of Venn diagrams like this one: According to those representation, in the gray space there are some URIs which are neither URLs nor URNs, but it sounds pretty weird to me. In…
floatingpurr
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Examples of URI, URL and URN

I have read many articles about URIs, URLs and URNs, but I don't understand the diff in real examples. Could you take a few examples of URI and URL? I think http://stack.com/first/index.html?submit=yes&action=go#second is URI, not URL, yes? Then…
Bren Ginthom
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Can you give an example of a URN for private-use

According to Wikipedia, urn:: The leading urn: sequence is case-insensitive. is the namespace identifier, which determines the syntactic interpretation of , the namespace-specific string. The functional requirements for…
Luke Puplett
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Appropropriate URN namespace now that X- is deprecated?

As recently as 2002 the IETF was recommending in RFC 3406 that we should use x- prefixes for URN namespaces we didn't want to register, e.g. urn:x-acme:foobar. Now that the IETF has deprecated the x- prefix in RFC 6648, how are we supposed to…
Garret Wilson
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