: 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?

@Ashley

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The dc:identifier is commonly an ISBN, though any sort of URN will do. Further information about using in epub can be found on the IDPF's site, but as a quick example, you could use something like:

<dc:identifier id="isbn">urn:isbn:0451450523</dc:identifier>

As long as the identifier is unique, it should be fine. At the above link, the IDPF says:

Every metadata section must include at least one identifier element
containing an unambiguous identifier for the Publication. Multiple
identifier elements are permitted, but only one can be marked as the
Unique Identifier via the package element unique-identifier attribute.

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