Adobe 12020596 User Guide - Page 23

Document Structure

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Adobe Acrobat SDK Adobe® Supplement to the ISO 32000 3.6 Document Structure Syntax (Chapter 3 in PDF Reference) 3.6 Document Structure 23 3.6.1 Document Catalog Add the following new entry after the Version entry in Table 3.25 TABLE 3.25 Entries in the catalog dictionary KEY SUBTYPE DESCRIPTION Extensions dictionary (ExtensionLevel 3) An extensions dictionary representing information about the PDF extensions that this document may contain. Table 3.25a on page 24 describes the entries in the extensions dictionary. 3.6.2 Page Tree Add new values to the value for the Tabs key in Table 3.27. Unchanged text is shown in gray. KEY Tabs TYPE name TABLE 3.27 Entries in a page object VALUE (Optional; PDF 1.5) A name specifying the tab order that shall be used for annotations on the page. The possible values shall be R (row order), C (column order), and S (structure order). Beginning with ExtensionLevel 3, the possible values also include A (annotations array order) and W (widget order). See Section 8.4, "Annotations" for details. Regarding annotations array order, see implementation note E-17, page 132. 3.6.3 Name Dictionary Add the new entry XFAResources to Table 3.28. TABLE 3.28 Entries in the name dictionary KEY TYPE VALUE XFAResources dictionary (Optional; ExtensionLevel 3) A name tree mapping name strings to streams that contain the element of the XFA. (See "Incorporation of XFA Datasets into a PDF/A-2 Conforming File" on page 48.) 3.6.4 Extensions to PDF Add this new section (including the above title) after Section 3.6.3 "Name Dictionary." Beginning with BaseVersion 1.7, the extensions dictionary lets developers designate that a given document contains extensions to PDF. The presence of the extension dictionary in a document indicates

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Adobe Acrobat SDK
Syntax (Chapter 3 in PDF Reference)
Adobe® Supplement to the ISO 32000
3.6 Document Structure
23
3.6 Document Structure
3.6.1 Document Catalog
Add the following new entry after the
Version
entry in Table 3.25
3.6.2 Page Tree
Add new values to the value for the
Tabs
key in Table 3.27. Unchanged text is shown in gray
.
3.6.3 Name Dictionary
Add the new entry
XFAResources
to Table 3.28.
3.6.4 Extensions to PDF
Add this new section (including the above title) after Section 3.6.3 “Name Dictionary.”
Beginning with BaseVersion 1.7, the extensions dictionary lets developers designate that a given
document contains extensions to PDF. The presence of the extension dictionary in a document indicates
TABLE 3.25 Entries in the catalog dictionary
KEY
SUBTYPE
DESCRIPTION
Extensions
dictionary
(
ExtensionLevel 3
) An extensions dictionary representing information
about the PDF extensions that this document may contain. Table 3.25a
on
page 24
describes the entries in the extensions dictionary.
TABLE 3.27 Entries in a page object
KEY
TYPE
VALUE
Tabs
name
(Optional; PDF 1.5)
A name specifying the tab order that shall be used for
annotations on the page. The possible values shall be
R
(row order),
C
(column order), and
S
(structure order).
Beginning with ExtensionLevel
3, the possible values also include
A
(annotations array order) and
W
(widget order). See Section 8.4, “Annotations” for details.
Regarding annotations array order, see implementation note E-17,
page 132
.
TABLE 3.28 Entries in the name dictionary
KEY
TYPE
VALUE
XFAResources
dictionary
(
Optional; ExtensionLevel 3
) A name tree mapping name strings to
streams that contain the
<xfa:datasets>
element of the XFA. (See
“
Incorporation of XFA Datasets into a PDF/A-2 Conforming File
” on
page 48
.)