A URN is similar to a person's name, while a URL is like a street address. The URN defines something's identity, while the URL provides a location. Essentially URN vs. URL is "what" vs. "where". A URN has to be of this form <URN> ::= "urn:" <NID> ":" <NSS> where <NID> is the Namespace Identifier, and <NSS> is the Namespace Specific String.

2013年9月3日 · Lastly, URN (Uniform Resource Name) is like a name tag on the book itself. It doesn't say where the book is in the library; it just gives it a unique name. So, URI is like telling where to find it roughly, and URN is like giving it a special name. so in conclusion a URL might be also a URN and both are URIs

2008年10月7日 · urn:uuid:6e8bc430-9c3a-11d9-9669-0800200c9a66 a globally unique identifier; urn:publishing:book - An XML namespace that identifies the document as a type of book. URNs can identify ideas and concepts. They are not restricted to identifying documents. When a URN does represent a document, it can be translated into a URL by a "resolver".

2017年3月1日 · URLs and URN s are special forms of URIs. A URI that identifies the mechanism by which a resource may be accessed is usually referred to as a URL. HTTP URIs are examples of URLs. If the URI has urn as its scheme and adheres to the requirements of RFC 2141 and RFC 2611, it is a URN. The goal of URN s is to provide globally unique names for ...

2014年6月8日 · For the 'URN:' URI scheme, one of the rules found in 'uri.arpa.' would be for the 'urn' URI scheme. This rule would simply delegate to the 'urn.arpa.' zone for additional NAPTRs based on the URN namespace. Essentially, the URI Resolution Rewrite Rule for 'URN:' is the URN Resolution Application's First Well Known Rule.

2013年7月25日 · Some namespaces are defined in other IANA registries, for example urn:ietf:params:xml: with the corresponding files for the resources. Other namespaces point to already-established identifier spaces, like urn:isbn: (some metadata can be retrieved, but I don't think there is anything that will allow you to download the book from its ISBN), urn:oid:.

2020年3月13日 · There is a hacky way I have found. It turns out, you can find it on the page source. Here is an example of how I got it:

2018年2月27日 · In the case of IETF protocols, the URN of the most current RFC that specifies the protocol is used. URI references created specifically for SAML have one of the following stems, according to the specification set version in which they were first introduced: urn:oasis:names:tc:SAML:1.0: urn:oasis:names:tc:SAML:1.1: urn:oasis:names:tc:SAML:2.0:

2020年12月12日 · I am able to post to LinkedIn via the API and I get the URN/id of the post returned, but I don't know how to get the actual URL of the post using the returned URN. I cannot find the information anywhere in the API documentation.

2021年3月31日 · It implements a class for representing an Uniform Resource Name (URN). It also implements parsing and serialization according to the constraints defined in RFC 2141 . It's released on Maven Central and aims to serve as a network identifier handling library just like the native Java URL and URI classes.