NAME
    XML::Filter::DataIndenter - SAX2 Indenter for data oriented XML

SYNOPSIS
        use XML::Filter::DataIndenter;

        use XML::SAX::Machines qw( Pipeline );

        Pipeline( XML::Filter::DataIndenter => \*STDOUT );

DESCRIPTION
    ALPHA CODE ALERT: This is the first release. Feedback and patches
    welcome.

    In data oriented XML, leaf elements (those which contain no elements)
    contain only character content, all other elements contain only child
    elements and ignorable whitespace. This filter consumes all whitespace
    not in leaf nodes and replaces it with whitespace that indents all
    elements. Character data in leaf elements is left unmolested.

    This filter assumes you're emitting data oriented XML. It will die if it
    sees non-whitespace character data outside of a leaf element. It also
    dies if it sees start-tag / end-tag mismatch, just as a service to the
    programmer.

    Processing instructions and comments are indented as though they were
    leaf elements except when they occur in leaf elements.

  Example:
    This document:

        <a><?A?>
        <!--A--><b><?B?><!--B-->B</b>
            <!--A-->
            </a>

    gets reindented as:

        <a>
          <?A?>
          <!--A-->
          <b><?B?><!--B-->B</b>
          <!--A-->
        </a>

    (plus or minus a space in each PI, depending on your XML writer).

LIMITATIONS
    Considers only [\r\n \t] to be whitespace; does not think about the
    broader Unicode definition of whitespace. This will be addressed when
    time and need permit.

COPYRIGHT
        Copyright 2003, R. Barrie Slaymaker, Jr., All Rights Reserved

LICENSE
    You may use this module under the terms of the BSD, Artistic, oir GPL
    licenses, any version.

AUTHOR
    Barrie Slaymaker <barries@slaysys.com>