: Re: EPUB 3.0 My question is on the <dc:identifier>. Is the <dc:indentifier> unique and hashed to an IP address or MAC address?

@Lorraine

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Yes it should be unique, and no, it is not hased to an IP or MAC address.

The example in the EPUB 3.0 specification uses a UUID.
The particular UUID used in the example is:

A1B0D67E-2E81-4DF5-9E67-A64CBE366809

And the 4 in the position directly after the second - indicates that it is a random UUID. The UUID linked to a MAC address is version 1.

There is however, no necessity that this is a UUID. The only premise is that

a primary identifier that is unique to one and only one particular EPUB Publication

E.g. the epub 3 examples mostly use a URN, and AFAIK none of those use an ISBN.

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