XML::AutoWriter(3pm)					User Contributed Perl Documentation				      XML::AutoWriter(3pm)

NAME

       XML::AutoWriter - DOCTYPE based XML output

SYNOPSIS

	  use XML::Doctype	   NAME => a, SYSTEM_ID => 'a.dtd' ;
	  use XML::AutoWriter qw( :all :dtd_tags ) ;
	  #
	  # a.dtd contains:
	  #
	  #   <!ELEMENT a ( b1, b2?, b3* ) >
	  #	 <!ATTLIST   a aa1 CDATA       #REQUIRED >
	  #   <!ELEMENT b1 ( c1 ) >
	  #   <!ELEMENT b2 ( c2 ) >
	  #
	  b1 ;		      # Emits <a><b1>
	  c2( attr=>"val" ) ; # Emits </b1><b2><c2 attr="val">
	  endAllTags ;	      # Emits </c2></b2></a>

	  ## If you've got an XML::Doctype object handy:
	  use XML::AutoWriter qw( :dtd_tags ), DOCTYPE => $doctype ;

	  ## If you've saved a preparsed DTD as a perl module
	  use FooML::Doctype::v1_0001 ;
	  use XML::AutoWriter qw( :dtd_tags ) ;

	  ## Or as a normal perl object:
	  $writer = XML::AutoWriter->new( ... ) ;
	  $writer->startTag( 'b1' ) ;
	  $writer->startTag( 'c2' ) ;
	  $writer->end ;

STATUS

       Alpha.  Use and patch, don't depend on things not changing drastically.

       Many methods supplied by XML::Writer are not yet supplied here.

DESCRIPTION

       This module subclasses XML::ValidWriter and provides automatic start and end tag generation, allowing you to emit only the 'important'
       tags.

       See XML::ValidWriter for the details on all functions not documented here.

   XML::Writer API compatibility
       Much of the interface is patterned after XML::Writer so that it can possibly be used as a drop-in replacement.  It will take awhile before
       this module emulates enough of XML::Writer to be a drop-in replacement in situations where the more advanced XML::Writer methods are used.

   Automatic start tags
       Automatic start tag creation is done when emitting a start tag that is not allowed to be a child of the currently open tag but is allowed
       to be contained in the currently open tag's subset.  In this case, the minimal number of start tags necessary to allow All start tags
       between the current tag and the desired tag are automatically emitted with no attributes.

   Automatic end tags
       If start tag autogeneration fails, then end tag autogeneration is attempted.  startTag() scans the stack of currently open tags trying to
       close as few as possible before start tag autogeneration suceeds.

       Explicit end tags may be emitted to prevent unwanted automatic start tags, and, in the future, warnings or errors will be available in
       place of automatic start and end tag creation.

METHODS AND FUNCTIONS

       All of the routines in this module can be called as either functions or methods unless otherwise noted.

       To call these routines as functions use either the DOCTYPE or :dtd_tags options in the parameters to the use statement:

	  use XML::AutoWriter DOCTYPE => XML::Doctype->new( ... ) ;
	  use XML::AutoWriter qw( :dtd_tags ) ;

       This associates an XML::AutoWriter and an XML::Doctype with the package.  These are used by the routines when called as functions.

       new
	      $writer = XML::AutoWriter->new( DTD => $dtd, OUTPUT => *FH ) ;

	   Creates an XML::AutoWriter.

	   All other parameters are passed to the XML::ValidWriter base class constructor.

       characters
	      characters( 'yabba dabba dooo' ) ;
	      $writer->characters( 'yabba dabba dooo' ) ;

	   If the currently open tag cannot contain #PCDATA, then start tag autogeneration will be attempted, followed by end tag autogeneration.

	   Start tag autogeneration takes place even if you pass in only '', or even (), the empty list.

       endTag
	      endTag ;
	      endTag( 'a' ) ;
	      $writer->endTag ;
	      $writer->endTag( 'a' ) ;

	   Prints one or more end tags.  The tag name is optional and defaults to the most recently emitted start tag if not present.

	   This will emit as many close tags as necessary to close the supplied tag name, or will emit an error if the tag name specified is not
	   open in the output document.

       startTag
	      startTag( 'a', attr => val ) ;  # use default XML::AutoWriter for
					      # current package.
	      $writer->startTag( 'a', attr => val ) ;

	   Emits a named start tag with optional attributes.  If the named tag cannot be a child of the most recently started tag, then any tags
	   that need to be opened between that one and the named tag are opened.

	   If the named tag cannot be enclosed within the most recently opened tag, no matter how deep, then startTag() tries to end as few
	   started tags as necessary to allow the named tag to be emitted within a tag already on the stack.

	   This warns (once) if no <?xml?> declaration has been emitted.  It does not check to see if a <!DOCTYPE...> has been emitted.  It dies
	   if an attempt is made to emit a second root element.

AUTHOR

       Barrie Slaymaker <barries@slaysys.com>

COPYRIGHT

       This module is Copyright 2000, 2005, 2009 Barrie Slaymaker.  Some rights reserved.

       This module is licensed under your choice of the Artistic, BSD or General Public License.

perl v5.12.4							    2011-09-15						      XML::AutoWriter(3pm)