CHAPTER 10
858
Document Interchange
KEY
TYPE
VALUE
ParentTreeNextKey
integer
dictionary
(Optional)
An integer greater than any key in the parent tree, to be used as a
key for the next entry added to the tree.
(Optional)
A dictionary that maps the names of structure types used in the
document to their approximate equivalents in the set of standard structure
types (see Section 10.7.3, “Standard Structure Types”).
(Optional)
A dictionary that maps name objects designating attribute class-
es to the corresponding attribute objects or arrays of attribute objects (see
RoleMap
ClassMap
dictionary
TABLE 10.10 Entries in a structure element dictionary
KEY
TYPE
VALUE
Type
name
name
(Optional)
The type of PDF object that this dictionary describes; if
present, must be
StructElem
for a structure element.
(Required)
The
structure type,
a name object identifying the nature of the
structure element and its role within the document, such as a chapter,
paragraph, or footnote (see Section 10.6.2, “Structure Types”). Names of
structure types must conform to the guidelines described in Appendix E.
(Required; must be an indirect reference)
The structure element that is the
immediate parent of this one in the structure hierarchy.
(Optional)
The
element identifier,
a byte string designating this structure
element. The string must be unique among all elements in the docu-
ment’s structure hierarchy. The
IDTree
entry in the structure tree root
(see Table 10.9) defines the correspondence between element identifiers
and the structure elements they denote.
(Optional; must be an indirect reference)
A page object representing a
page on which some or all of the content items designated by the
K
entry
are rendered.
S
P
dictionary
byte string
ID
Pg
dictionary