Quote:
Originally Posted by DNSB
I suspect the F7 (Well-Formed Check Epub) tool is being referred to. FlightCrew has it's uses for epub2 but will not check an epub3.
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And as we have to point out repeatedly ... Sigil's Well-Formed Check is not a "Validator" of any kind. Sigil itself is out of the EPUB validation game. Validation is achieved through plugins: there are plugins available for Flightcrew (EPUB2) or EpubCheck (EPUB2/3).
The Well-Formed Check (F7) in Sigil checks that there is no malformed xhtml (all tags properly closed, no improper nesting). Nothing more.
So it's not surprising at all that Sigil itself wouldn't catch a well-formed OPF file with an out of spec (EPUB spec) entry.