SECTION 3.6
145
Document Structure
table also identifies which attributes a page may inherit from its ancestor nodes in
the page tree, as described under “Inheritance of Page Attributes” on page 149.
Attributes that are not explicitly identified in the table as inheritable cannot be
inherited.
TABLE 3.27 Entries in a page object
KEY
TYPE
VALUE
Type
name
dictionary
date
(Required)
The type of PDF object that this dictionary describes; must be
Page
for a page object.
(Required; must be an indirect reference)
The page tree node that is the im-
mediate parent of this page object.
(Required if
PieceInfo
is present; optional otherwise; PDF 1.3)
The date and
time (see Section 3.8.3, “Dates”) when the page’s contents were most re-
cently modified. If a page-piece dictionary (
PieceInfo
) is present, the
modification date is used to ascertain which of the application data dictio-
naries that it contains correspond to the current content of the page (see
(Required; inheritable)
A dictionary containing any resources required by
the page (see Section 3.7.2, “Resource Dictionaries”). If the page requires
no resources, the value of this entry should be an empty dictionary. Omit-
ting the entry entirely indicates that the resources are to be inherited from
an ancestor node in the page tree.
(Required; inheritable)
A rectangle (see Section 3.8.4, “Rectangles”), ex-
pressed in default user space units, defining the boundaries of the physical
medium on which the page is intended to be displayed or printed (see
(Optional; inheritable)
A rectangle, expressed in default user space units,
defining the visible region of default user space. When the page is dis-
played or printed, its contents are to be clipped (cropped) to this rectangle
and then imposed on the output medium in some implementation-
defined manner (see Section 10.10.1, “Page Boundaries”). Default value:
the value of
MediaBox
.
(Optional; PDF 1.3)
A rectangle, expressed in default user space units, de-
fining the region to which the contents of the page should be clipped
when output in a production environment (see Section 10.10.1, “Page
CropBox
.
Parent
LastModified
Resources
dictionary
MediaBox
rectangle
CropBox
rectangle
BleedBox
rectangle