Quote:
Originally Posted by trekchick
ePub doesn't define dictionary lookup, but ePub readers do support it. For example, Sony Readers come with regular British and American English dictionaries plus a dozen or so translation dictionaries to look up words in ePub or PDF documents.
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As I understand Sony has not published their dictionary format therefore it is not possible to use third party dictionaries without Sony's cooperation. That's really not enough.
Some other epub readers use stardict format dictionaries. I haven't tried them but it could work for most people. I am already planning to convert my existing mobipocket dictionaries so that I don't have to buy them again when all vendors have switched to epub readers.
Amazon's dictionary support is not perfect either. It is just a byproduct of a hack job over Palm databases that is called mobipocket format. For example, their newly released Cloud reader does not support dictionaries at all.