Incompatibility of -epub-text-combine's "Inherited" between EPUB 3.0 and 3.0.1

Hi,

EPUB 3.0 defines -epub-text-combine [1] as an alias of text-combine [2]
whose Inherited is no.
IIUC, EPUB 3.0.1 defines -epub-text-combine [3] as an alias of
text-combine-horizontal [4] whose Inherited is yes.

The latest EPUB 3.3 [5] is mostly the same as EPUB 3.0.1 except an alias of
text-combine-upright [6] instead of text-combine-horizontal.

Is this intentional incompatibility?

There is an EBPAJ's sample EPUB file [7]. Although it just checks how a
reading system renders an EPUB and doesn't check conformance, it is famous
in Japan and most publishers use it to check reading systems. The EBPAJ's
sample has a content to check this "Inherited" behaviour. Then, our
customer asked us to fix EPUB 3.0's "Inherited: no".

[1]:
http://idpf.org/epub/30/spec/epub30-contentdocs-20111011.html#sec-css-writing-modes
[2]: https://www.w3.org/TR/2011/WD-css3-writing-modes-20110428/#text-combine
[3]:
http://idpf.org/epub/301/spec/epub-contentdocs-20140626.html#sec-css-writing-modes
[4]:
https://www.w3.org/TR/2012/WD-css3-writing-modes-20121115/#text-combine-horizontal0
[5]:
https://w3c.github.io/publ-epub-revision/epub33/core/#sec-css-prefixed-writing-modes
[6]:
https://www.w3.org/TR/2012/WD-css3-writing-modes-20121115/#text-combine-horizontal0
[7]: http://ebpaj.jp/counsel/guide

Best regards
Yuki Sekiguchi

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