This is a follow up of a previous post. Please read the first post before if you didn’t already.
There were a couple of problems in publishing my selfpublished ePub from LaTeX with SPF Narcissus. They are really kind and professional! Substantially, the validation tool of Sigil is not good enough for the metadata. It is far better to validate through Three Press, which gives a sharp check of your file.
What I had to do was to convert my TeX source file through SimpleTeX4ht in XHTML as a single file, and then split chapters manually in Sigil. An hour work, not more, not less.
I had to modify metadata, in particular author, title, language, and checking TOC, which is still not perfect but valid.
Next time I will do even better…