| A XRef subsection in a pdf document.
A XRef section consists of at least one subsection. The subsections describe
the objects that have changed with regard to the previous document version.
Each subsection contains entries for a contiguous range of objects. The
serialized form starts with 2 number, the object number of the first entry
and the number of entries. Following this ther is one line for each enty in
the form
In Use entry:
offset[10] " " generation[5] " " n eol[2]
Free entry:
next free[10] " " generation[5] " " f eol[2]
| 