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XML::Handler::SubUser Contributed Perl DocumentXML::Handler::Subs(3)

       XML::Handler::Subs - a PerlSAX handler base class for calling
       user-defined subs

        use XML::Handler::Subs;

        package MyHandlers;
        use vars qw{ @ISA };

        sub s_NAME { my ($self, $element) = @_ };
        sub e_NAME { my ($self, $element) = @_ };

        $self->{Names};    # an array of names
        $self->{Nodes};    # an array of $element nodes

        $handler = MyHandlers->new();

       "XML::Handler::Subs" is a base class for PerlSAX handlers.
       "XML::Handler::Subs" is subclassed to implement complete
       behavior and to add element-specific handling.

       Each time an element starts, a method by that name prefixed
       with `s_' is called with the element to be processed.  Each
       time an element ends, a method with that name prefixed with
       `e_' is called.  Any special characters in the element name
       are replaced by underscores.

       Subclassing XML::Handler::Subs in this way is similar to
       XML::Parser's Subs style.

       XML::Handler::Subs maintains a stack of element names,
       `"$self-"{Names}', and a stack of element nodes,
       `"$self-"{Nodes}>' that can be used by subclasses.  The cur‐
       rent element is pushed on the stacks before calling an ele‐
       ment-name start method and popped off the stacks after call‐
       ing the element-name end method.  The `"in_element()"' and
       `"within_element()"' calls use these stacks.

       If the subclass implements `"start_document()"', `"end_docu‐
       ment()"', `"start_element()"', and `"end_element()"', be sure
       to use `"SUPER::"' to call the the superclass methods also.
       See perlobj(1) for details on SUPER::.  `"SUPER::start_ele‐
       ment()"' and `"SUPER::end_element()"' return 1 if an element-
       name method is called, they return 0 if no method was called.

       XML::Handler::Subs does not implement any other PerlSAX han‐

       XML::Handler::Subs supports the following methods:

       new( OPTIONS )
           A basic `"new()"' method.  `"new()"' takes a list of key,
           value pairs or a hash and creates and returns a hash with
           those options; the hash is blessed into the subclass.

           Returns true if `"$name"' is equal to the name of the
           innermost currently opened element.

           Returns the number of times the `"$name"' appears in

       Ken MacLeod,

       perl(1), PerlSAX.pod(3)

3rd Berkeley Distribution    perl v5.6.1       XML::Handler::Subs(3)
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