Hi,
I am reading a ISO spec (ISO 23008-12:2017) which mentions that heif can store image metadata in form of XMP(Extensible Metadata Platform). The spec says the following :
A.3 XMP metadata
For image items, XMP metadata shall be stored as an item of item_type value 'mime' and content type 'application/rdf+xml'. The body of the item shall be a valid XMP document, in XML form.
So I want to know whether there is only single item with item_type 'mime' and content type 'application/rdf+xml' can be present in single image heif whose content is valid XMP packet or there can be any number of items with item_type 'mime' and content type 'application/rdf+xml' which can contain any other valid rdf+xml data which is not necessarily a valid XMP packet.
Thanks in advance.