SECTION G.6
1075
Up dating Example
The sections following show the segments added to the file at each stage.
Throughout this example, objects are referred to by their object identifiers, which
are made up of the object number and the generation number, rather than simply
by their object numbers as in earlier examples. This is necessary because the ex-
ample reuses object numbers; therefore, the objects they denote are not unique.
Note:
The tables in these sections show only those objects that are modified during
the updating process. Objects from Example G.1 that are not altered during the up-
date are not shown.
G.6.1 Stage 1: Add Four Text Annotations
Four text annotations are added to the initial file and the file is saved. Table G.4
lists the objects involved in this update.
TABLE G.4 Object usage after adding four text annotations
OBJECT IDENTIFIER
OBJECT TYPE
4 0
7 0
8 0
9 0
10 0
11 0
Page
(page object)
Annotation array
Annot
(annotation dictionary)
Annot
(annotation dictionary)
Annot
(annotation dictionary)
Annot
(annotation dictionary)
updated because an
Annots
entry has been added to it. Note that the file’s trailer
now contains a
Prev
entry, which points to the original cross-reference section in
the file, while the
startxref
value at the end of the trailer points to the cross-
reference section added by the update.