Just a quick Q re: epub formats... Does your epub ingestion system support files formatted specifically for iBooks (i.e. containing non-epub spec content such as a com.apple file,
viewport values, etc.), or just epub 2/3 compliance?
Not exact matches
Each XHTML and SVG spine item which has the «pre-paginated»
value set for its rendition: layout property must contain the
viewport (for XHTML) or viewBox (for SVG) dimension expressions as defined below.
Note that if the pixel
values defined by x, y, height and width attributes exceed the
Viewport's pixel
values, the graphic will be clipped on the
Viewport boundaries (i.e., the graphics will not be rescaled).
Pagination is sometimes done using columns, which can result in incorrect
values for
viewport sizes.