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CHAPTER 3 Syntax
KEY TYPE VALUE
TrimBox rectangle (Optional; PDF 1.3) A rectangle, expressed in default user space units, de-
fining the intended dimensions of the finished page after trimming (see
Section 10.10.1, “Page Boundaries”). Default value: the value of CropBox.
ArtBox rectangle (Optional; PDF 1.3) A rectangle, expressed in default user space units, de-
fining the extent of the page’s meaningful content (including potential
white space) as intended by the page’s creator (see Section 10.10.1, “Page
Boundaries”). Default value: the value of CropBox.
BoxColorInfo dictionary (Optional; PDF 1.4) A box color information dictionary specifying the col-
ors and other visual characteristics to be used in displaying guidelines on
the screen for the various page boundaries (see “Display of Page Bound-
aries” on page 965). If this entry is absent, the application should use its
own current default settings.
Contents stream or array (Optional) A content stream (see Section 3.7.1, “Content Streams”) de-
scribing the contents of this page. If this entry is absent, the page is empty.
The value may be either a single stream or an array of streams. If the value
is an array, the effect is as if all of the streams in the array were concatenat-
ed, in order, to form a single stream. This allows PDF producers to create
image objects and other resources as they occur, even though they inter-
rupt the content stream. The division between streams may occur only at
the boundaries between lexical tokens (see Section 3.1, “Lexical Conven-
tions”) but is unrelated to the page’s logical content or organization. Ap-
plications that consume or produce PDF files are not required to preserve
the existing structure of the Contents array. (See implementation note 36
in Appendix H.)
Rotate integer (Optional; inheritable) The number of degrees by which the page should
be rotated clockwise when displayed or printed. The value must be a mul-
tiple of 90. Default value: 0.
Group dictionary (Optional; PDF 1.4) A group attributes dictionary specifying the attributes
of the page’s page group for use in the transparent imaging model (see
Sections 7.3.6, “Page Group,” and 7.5.5, “Transparency Group XObjects”).
Thumb stream (Optional) A stream object defining the page’s thumbnail image (see Sec-
tion 8.2.3, “Thumbnail Images”).
B array (Optional; PDF 1.1; recommended if the page contains article beads) An ar-
ray of indirect references to article beads appearing on the page (see Sec-
tion 8.3.2, “Articles”; see also implementation note 37 in Appendix H).
The beads are listed in the array in natural reading order.
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