Epub-specs: Why mention nav without mentioning cover-image in Publications 3.1?
Drop this sentence from Pub 3.1.
Exactly one item must be declared as the EPUB Navigation Document using the nav property.
murata2makoto
All 3 comments
<item properties="cover-image"> is optional. See http://www.idpf.org/epub/30/spec/epub30-publications.html#sec-item-property-values.
TzviyaSiegman
on 18 Aug 2016
I understand that cover-image is optional. But I would argue that it should be mentioned if nav is mentioned.
Perhaps,
At most one item must be declared as the cover image using the cover-image property.
murata2makoto
on 18 Aug 2016
The entire paragraph before the sentence you wanted to drop is about descriptive properties, and includes a link to the manifest vocab. That seems plenty for optional properties.
The only one that has to be specified in every package document in order for the publication to be valid is "nav". That's why it's the only one called out.
mattgarrish
on 18 Aug 2016
Related issues
BCWalters
路
6Comments
mattgarrish
路
7Comments
danielweck
路
4Comments
codedread
路
13Comments
TPS
路
4Comments
Most helpful comment
The entire paragraph before the sentence you wanted to drop is about descriptive properties, and includes a link to the manifest vocab. That seems plenty for optional properties.
The only one that has to be specified in every package document in order for the publication to be valid is "nav". That's why it's the only one called out.