added details about the URL backend
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@ -46,7 +46,12 @@ content of an annexed file remains unchanged.
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files or slow systems.
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* `URL` -- This is a key that is generated from the url to a file.
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It's generated when using eg, `git annex addurl --fast`, when the file
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content is not available for hashing.
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content is not available for hashing. The key may not contain the full
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URL; for long URLs, part of the URL may be represented by a checksum.
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The URL key may contain `&` characters; be sure to quote the key if
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passing it to a shell script. The URL-backend key is distinct from URLs/URIs
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that may be attached to a key (from any backend) indicating the key's location
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on the web or in one of [[special_remotes]].
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If you want to be able to prove that you're working with the same file
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contents that were checked into a repository earlier, you should avoid
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@ -75,3 +80,5 @@ in `.gitattributes`:
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* annex.backend=WORM
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*.mp3 annex.backend=SHA256E
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*.ogg annex.backend=SHA256E
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See also: [[git-annex-examinekey]]
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