Describes if the desired position is just before or after the EPUB CFI target location.
For example, when resolving a location in a dynamically paginated environment,
it would make a difference if a location is attached to the content before or after it
(e.g., to determine whether to display the verso or recto side at a page break).
Describes if the desired position is just before or after the EPUB CFI target location. For example, when resolving a location in a dynamically paginated environment, it would make a difference if a location is attached to the content before or after it (e.g., to determine whether to display the verso or recto side at a page break).
See http://idpf.org/epub/linking/cfi/epub-cfi.html#sec-path-side-bias