SECTION 10.7
933
Tagged PDF
TABLE 10.34 Standard list attribute
KEY
TYPE
VALUE
ListNumbering
name
(Optional; inheritable)
The numbering system used to generate the content of
the
Lbl
(Label) elements in an autonumbered list, or the symbol used to identify
each item in an unnumbered list:
None
No autonumbering;
Lbl
elements (if present) contain arbitrary
text not subject to any numbering scheme
Solid circular bullet
Open circular bullet
Solid square bullet
Decimal arabic numerals (
1
–
9
,
10
–
99
, … )
Disc
Circle
Square
Decimal
UpperRoman
Uppercase roman numerals (
I
,
II
,
III
,
IV
, … )
LowerRoman
UpperAlpha
LowerAlpha
Lowercase roman numerals (
i
,
ii
,
iii
,
iv
, … )
Uppercase letters (
A
,
B
,
C
, … )
Lowercase letters (
a
,
b
,
c
, … )
Default value:
None
.
Note:
The alphabet used for
UpperAlpha
and
LowerAlpha
is determined by the pre-
vailing
Lang
entry (see Section 10.8.1, “Natural Language Specification”).
Note:
The set of possible values may be expanded as Unicode identifies additional
numbering systems.
Note:
This attribute is used to allow a content extraction tool to autonumber a list.
However, the
Lbl
elements within the table should nevertheless contain the resulting
numbers explicitly, so that the document can be reflowed or printed without the
need for autonumbering.
PrintField Attributes
(PDF
1.7)
The attributes described in Table 10.35 identify the role of fields in
non-interactive PDF forms. Such forms may have originally contained interactive
fields such as text fields and radio buttons but were then converted into non-in-
teractive PDF files, or they may have been designed to be printed out and filled in
manually. Since the roles of the fields cannot be determined from interactive ele-
ments, the roles are defined using PrintField attributes.