301
USING ACROBAT X PRO
Accessibility, tags, and reflow
Last updated 10/11/2011
•
<THead>
,
<TBody>
, and
<TFoot>
sections, each of which contains Table Rows. (The Table Rows contain
<TH>
cells,
<TD>
cells, or both.)
3
Do one or more of the following:
•
If the tag for the table doesn’t contain these elements, but rows, columns, and cells appear in the table in the
document pane, use the TouchUp Reading Order tool to select and define the table or individual cells.
•
If the table contains rows that span two or more columns, set ColSpan and RowSpan attributes for these rows in
the tag structure.
•
Re-create the table in the authoring application, and then convert it to a tagged PDF.
Set ColSpan and RowSpan attributes
1
In the Tags tab, select a
<TD>
or
<TH>
element.
2
Choose Properties from the Options menu.
3
In the TouchUp Properties dialog box, click the Tag tab, and then click Edit Attribute Objects.
4
Select Attribute Objects, and then click New Item to create a new Attribute Object Dictionary.
5
Expand the new dictionary, select the Layout attribute, and then click Change Item.
6
Change the Layout value to Table.
7
Select the Attribute Object Dictionary, and click New Item.
8
In the Add Key And Value dialog box, type
ColSpan
or
RowSpan
in the Key box, enter the number of columns or
rows spanned in the Value box, choose Integer from the Value Type pop-up menu, and click OK.
Standard PDF tags
This section describes the standard tag types that apply to tagged PDFs. These standard tags provide assistive software
and devices with semantic and structural elements to use to interpret document structure and present content in a
useful manner.
The PDF tags architecture is extensible, so any PDF document can contain any tag set that an authoring application
decides to use. For example, a PDF can have XML tags that came in from an XML schema. Custom tags that you define
(such as tag names generated from paragraph styles of an authoring application) need a role map. The role map
matches each custom tag to a standard tag here. When assistive software encounters a custom tag, the software can
check this role map and properly interpret the tags. Tagging PDFs by using one of the methods described here
generally produces a correct role map for the document.
Note:
You can view and edit the role map of a PDF by choosing Options > Edit Role Map in the Tags tab.
The standard Adobe element tag types are available in the New Tag dialog box. They are also available in the TouchUp
Properties dialog box in Acrobat Pro. Adobe strongly encourages using these tag types because they provide the best
results when tagged content is converted to a different format. These formats include HTML, Microsoft Word, or an
accessible text format for use by other assistive technologies.
Block-level elements are page elements that consist of text laid out in paragraph-like forms. Block-level elements are
part of a document’s logical structure. Such elements are further classified as container elements, heading and
paragraph elements, label and list elements, special text elements, and table elements.
Container elements
Container elements are the highest level of element and provide hierarchical grouping for other block-level elements.
Document
Document element. The root element of a document’s tag tree.
Содержание 22020737 - Acrobat Pro - PC
Страница 1: ...Using ADOBE ACROBAT X PRO...
