Thread: proper use and setting of text direction CSS vs structural in epub3
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Old 03-23-2018, 04:14 PM   #4
Doitsu
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Quote:
Originally Posted by jhowell View Post
Someone else with more knowledge about this can clarify, but my understanding is that EPUB 2 allows the HTML5 css properties "direction" and "unicode-bidi" for handling text direction, but EPUB3 instead uses the attributes "dir", "bdi" and "bdo" for the same purpose.
You're correct. AFAIK, in epub2 books either the direction css property or the dir attribute can be used (in xhtml1.1 files). However, epubcheck 4.0.2 will flag the direction css property in epub3 books:

Quote:
ERROR(CSS-001): The 'direction' property must not be included in an EPUB Style Sheet.
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