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Q&A

What is an example for a URI which is not a URL?

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Every URL is a URI but not every URI is a URL is a saying I know from long ago, but what is an example for a URI which is not a URL (whatever the user agent would be - a web browser, a *nix utility such as curl and so forth)?

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Would you please at least check Wikipedia before asking a question here? Because if you do read https://en.wikipedia.org/wiki/Uniform_Resource_Identifier, you'll come across such an example in a matter of minutes. meriton‭ 17 days ago

I recall I have tried to check that article but I as a non native English speaker have trouble reading such long articles and even such long opener chapters on a topic I don't know anything about... This is exactly why I asked about an example focally as sometimes the best learning experience is with a good short example. JohnDoea‭ 17 days ago

I have removed the comments that are not relevant. Please use comments to ask for clarifications or generally speaking, to improve the question. Alexei‭ 17 days ago

This is a very relevant article on this topic: https://danielmiessler.com/study/difference-between-uri-url/ . A quick answer to your question: a book identifier (ISBN - ...) is an URI which is not an URL. Alexei‭ 17 days ago

This question is being discussed on meta. Alexei‭ 16 days ago

1 answer

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This article shows in a concise and graphical way the difference between URIs and URLs.

A URI is an identifier of a specific resource. Like a page, or book, or a document.

A URL is special type of identifier that also tells you how to access it, such as HTTPs, FTP, etc.—like https://www.google.com.

So, an example of a URI which is clearly not a URL is an ISBN code for a book.

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