What is the difference between URI, URL and URN? [duplicate]
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.
What is the difference between a URI, a URL, and a URN?
2008年10月7日 · So basically, a URN functions like a person's name and the URL depicts that person's address. So long story short, a URN defines an item's identity, while the URL provides defines the method for finding it, finally encapsulating these two concepts is the URI. edited Jul 9, 2016 at 17:46. Peter Mortensen.
Examples of URI, URL and URN - Stack Overflow
2017年3月1日 · 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 resources. The ISBN of this book is ISBN-13: 978-0596805821, by the way. If you click on the Amazon.com's link Why is ISBN important, you will see the ...
xml - How do you resolve a URN? - Stack Overflow
2009年5月7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.
c# - How do I represent URNs (Uniform Resource Names) in .NET …
2018年7月11日 · The Uri class does not support a specific parser for the urn: scheme out of the box. Maybe understandably so, because even if the comparison rules for the NID specify that it is case-insensitive, the rules for comparing two NSS would depend on rules as defined by the particular namespace, per RFC 8141.
Why is URN one of more popular formats used to uniquely …
a URN (Uniform Resource Name), is supposed to be unique across both (time and space ). a URL\URI cannot guarantee his uniqueness, unlike a URN that can be a URI in the same time. Maybe a URI Resource (X) in path (Y) is a valid URL , because the path can be a location, but the same whole Identifier (Z) can be duplicated in many physical, logical ...
xml - when to use a URN for xmlns - Stack Overflow
2015年11月14日 · 1. According to Wikipedia (and RFC 3406) URN namespaces must remain globally unique and are therefore required to be registered with IANA. There is an exception for namespaces intended only for use within internal or limited experimental contexts. These namespaces are prefixed with X- and are not required to be unique. – Chris_F.
java - URI vs URL vs URN - Stack Overflow
2013年9月3日 · java.net.URI API gives a good explanation: A URI is a uniform resource identifier while a URL is a uniform resource locator. Hence every URL is a URI, abstractly speaking, but not every URI is a URL. This is because there is another subcategory of URIs, uniform resource names (URNs), which name resources but do not specify how to locate them.
How do BitTorrent magnet links work? - Stack Overflow
2010年10月2日 · A traditional .torrent file contains a data structure with two top-level keys: announce, identifying the tracker (s) to use for the download, and info, containing the filenames and hashes for the torrent. The "infohash" is the hash of the encoded info data. Some magnet links include trackers or web seeds, but they often don't.
java - How do I validate URNs? - Stack Overflow
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.