Specifies the URI prefix stub to use in constructing the full EPUB ID value in the EPUB metadata.
Value
Any valid URI string. If this is a relative URI it should end with a "/" character.
Default
"http://my-URI-stub/" (this is a placeholder that will be flagged by the EPUB transform).
Notes
This parameter should normally reflect the organization that owns or publishes the EPUB, e.g., "http://mydomain.com/EPUB" or something similar.