XML::PatAct::Amsterdam






XML::PatAct::Amsterdam − An action module for simplistic
style−sheets


 use XML::PatAct::Amsterdam;

      my $patterns = [ PATTERN => { Before => ’before’,
                               After => ’after’ },
                  ... ];

      my $matcher = XML::PatAct::Amsterdam‐>new( I<OPTIONS> );

XML::PatAct::Amsterdam is a PerlSAX handler for applying
pattern‐action lists to XML parses or trees.
XML::PatAct::Amsterdam applies a very simple style sheet to
an instance and outputs the result.  Amsterdam gets it’s
name from the Amsterdam SGML Parser (ASP) which inspired
this module.

     CAUTION: Amsterdam is a very simple style module, you
will run into it’s limitations quickly with even moderately
complex XML instances, be aware of and prepared to switch to
more complete style modules.

     New XML::PatAct::Amsterdam instances are creating by
calling ‘new()’.  Parameters can be passed as a list of key,
value pairs or a hash.  A Patterns and Matcher options are
required.  The following OPTIONS are supported:

Patterns
    The pattern‐action list to apply.  The list is an
    anonymous array of pattern, action pairs.  Each action
    in the list contains either or both a Before and an
    After string to copy to the output before and after
    processing an XML element.  The Before and After strings
    may contain attribute names enclosed in square brackets
    (‘"["’ NAME ‘"]"’), these are replaced with the value of
    the attribute with that name.  The special NAME
    ‘"_element"’ will be replaced with the element’s name.

Matcher
    An instance of the pattern or query matching module.

Output
    An IO::Handle or one of it’s subclasses (such as
    IO::File), if this parameter is not present and the
    AsString option is not used, the module will write to
    standard output.

AsString
    Return the generated output as a string from the
    ‘"parse()"’ method of the PerlSAX event generator.











                             ‐2‐


Ken MacLeod, ken@bitsko.slc.ut.us

perl(1)

     ‘‘Using PatAct Modules’’ and ‘‘Creating PatAct
Modules’’ in libxml−perl.