MUST be an SVG - document fragment [[SVG]] and conform to all content conformance constraints - expressed in .
+MUST be a conforming SVG stand-alone file [[SVG]] and conform to all content conformance + constraints expressed in .
MAY specify the Overlay Structure
The For XHTML and SVG Content Documents, the fragment SHOULD be a reference to a . For XHTML and SVG Content Documents, the fragment SHOULD be a
+ reference to a target element [[HTML]] or an SVG Fragment
Identifier [[SVG]], respectively. EPUB Creators MAY use other fragment identifier schemes, but Reading Systems may not support
such identifiers.Referencing Document Fragments
-
epub:textref attribute and the text element's
src attribute both require a fragment identifier that references a specific
fragment (e.g., an element or text string) of the associated EPUB Content
- Document.Substantive Changes since the issue 1323.