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Status of EPUB Indexing Spec
EPUB Indexes 1.0 are my personal favorite, because of this:
This specification has no additional Reading System Conformance criteria beyond what is required by EPUB 3.0.1.
So literally all EPUB 3 reading systems already support it (not surprising since they support ul
, li
, and span
).
How much is this markup being used in the wild? Have any reading systems taken advantage of this markup to provide user-facing features?
We support the HTML markup, of course, but don't do anything special (user facing) with all the various indexing epub:type's.