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f d YZ d f d YZ d e f d YZ d S( s SAX document handlers that support output generation of XML, SGML,
and XHTML.
This module provides three different groups of objects: the actual SAX
document handlers that drive the output, DTD information containers,
and syntax descriptors (of limited public use in most cases).
Output Drivers
--------------
The output drivers conform to the SAX C<DocumentHandler> protocol.
They can be used anywhere a C<DocumentHandler> is used. Two drivers
are provided: a `basic' driver which creates a fairly minimal output
without much intelligence, and a `pretty-printing' driver that
performs pretty-printing with nice indentation and the like. Both can
optionally make use of DTD information and syntax objects.
DTD Information Containers
--------------------------
Each DTD information object provides an attribute C<syntax> which
describes the expected output syntax; an alternate can be provided to
the output drivers if desired.
Syntax Descriptors
------------------
Syntax descriptor objects provide several attributes which describe
the various lexical components of XML & SGML markup. The attributes
have names that reflect the shorthand notation from the SGML world,
but the values are strings which give the appropriate characters for
the markup language being described. The one addition is the
C<empty_stagc> attribute which should be used to end the start tag of
elements which have no content. This is needed to properly support
XML and XHTML.
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