SECTION 10.8
939
Accessibility Support
Example 10.19
2 0 obj
<< /Type /Page
/Contents 3 0 R
…
>>
endobj
% Page object
% Content stream
3 0 obj
% Page's content stream
<< /Length … >>
stream
BT
( See you later, or as Arnold would say, ) Tj
/Span << /Lang ( es-MX ) >>
% Start of marked-content sequence
BDC
( Hasta la vista . ) Tj
EMC
% End of marked-content sequence
ET
endstream
endobj
Where logical structure is described (by a structure hierarchy) within a docu-
ment, the
Lang
entry in the document catalog sets the default for the document.
Below that, any language specifications within the structure hierarchy apply in
this order:
•
A structure element’s language specification
Note:
If a structure element does not have a
Lang
entry, the element inherits its
language from any parent element that has one.
•
Within a structure element, a language specification for a nested structure ele-
ment or marked-content sequence
In Example 10.20, the
Lang
entry in the structure element dictionary (specifying
English) applies to the marked-content sequence having an
MCID
(marked-
content identifier) value of 0 within the indicated page’s content stream. However,
nested within that marked-content sequence is another one in which the
Lang
property attached with the
Span
tag (specifying Spanish) overrides the structure
element’s language specification.
Note:
This example and the next one below omit required
StructParents
entries in
the objects used as content items (see “Finding Structure Elements from Content