collection tag in content.opf?

[Japotrad]

Hello,
I use Sigil 1.9.30. In my content.opf file, I have added a collection tag to the package version="3.0" tag. When I save the file, the collection tag is removed and its link child elements are moved into the metadata tag.

If the collection tag is supported in Sigil, how to create it?
https://www.w3.org/publishing/epub/e...kg-collections

[KevinH]

There is no support for a collection tag in the opf in Sigil. Sigil only supports a single rendition. I have never seen this opf tag ever used.

Sigil machine reads the opf and keeps it parseable at all times to speed interactions. So using almost any tool in Sigil will remove any opf collections tag because it views it as a opf syntax error.

I will look into adding support for it but a valid test case would be a big help.

So Please post a properly formatted test case epub. If private, please pm KevinH (me) here with a link and I will look into adding support for it to the opf parser, the plugins, and whereever else it is needed.