Quote:
Originally Posted by GregS
WUIDs are very easy to generate (contact Lestec.com.au if there is interest in this). The idea is that edition is given one ID and the work itself another. These can both be established via name-space xmlns. It works like an ISB number but can be generated by anyone anytime on the net. If adopted, it means bibliographies and references are unambiguous and electronically chasable.
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An additional comment on this: Each epub must have a unique ID (but not each copy). For commercial ebooks, this would normally be the ISBN. For privately created epubs, you can use any method you like, as long as the ID does not conflict with any other epub. One method that I am using is simply a combination of a name and a Julian date. For example: jbenny2454404.4892939813. You could use an organization's name, a domain name, etc. The Julian date includes the date, hours, minutes and seconds. Such a combination is highly unlikely to collide with any other such epub ID.
I don't see any reason why you couldn't use such a technique to give each copy of an epub its own unique ID, if you wanted. Or, it may be easier to manage by using one of the other metadata fields for an individual copy ID, as I mentioned before.