Thank you for making Siren. Siren is the only one tool can rename multiple EPUB files by metadata.
I have some Japanese and Chinese EPUB files cannot be found metadata information because it has different file structure.

Siren can load "OEBPS/content.opf" but cannot load "item/standard.opf" for metadata information.
According to container.xml, there two different file structure.

Because the publishers follow The Electronic Book Publishers Association of Japan and Digital Comic Association in japan.

Can you let Siren load "item/standard.opf" for EPUB feature?
Thank you. smile