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is part of two different URLs (Uniform Resource Locators), also known as web links or web addresses):
https://gallica.bnf.fr/ark:/12148/btv1b8449691v/f29
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The average lifetime of a URL has been said to be 44 days. At the end of its life, a published URL will give URL link breaks, which means it gives you the dreaded "404 Not Found" error. As irritating as that it is for – and most of us , have seen it happen – it's a disaster for libraries, archives, museums, and other memory organizations. They want to advertise things via persistent identifiers, which should in principle A persistent identifier (sometimes abbreviated to PID) is an identifier that in principle will continue to work far into the future, even if those as things are moved between memory organizations and their websites. To make any identifier persistent they start by putting it inside a URL that can be the created persistent identifiers to use URLs based at resolversmove between websites. Normally when things move, we're burdened with broken links and having to learn to use their new URLs (links), and that's where identifier resolvers come in.
What's a resolver?
A resolver is a website that is especially good at forwarding incoming identifiers (those originally advertised to users) to whatever website is currently best suited to deal with it. To make this work, the hostname of the resolver itself should be carefully chosen so that it never has to be changed. Memory organizations, some of them centuries old, tend to have website hostnames that are especially stable and well suited to be resolvers. Other well-known resolvers include n2t.net, identifiers.org, doi.org, handle.net, and purl.org.
How do ARKs differ from DOIs, Handles, PURLs, and URNs?
They These are all major kinds of persistent identifiers. The short answer is that ARKs are the the only mainstream, non-siloed, non-paywalled identifiers. Over 500 registered organizations have created an estimated 3.2 billion ARKs in the world, and no one has ever paid for the right to create them.
Would you be able to expand on that answer?
Superficially, these identifiers all have similar structure and purpose.
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https://n2t.net/ark:/65665/3c2e39526-e0c3-41ae-be4f-07558a9458eb