NAME

       RDF::Trine::Parser - RDF Parser class

VERSION

       This document describes RDF::Trine::Parser version 1.019

SYNOPSIS

        use RDF::Trine::Parser;

        RDF::Trine::Parser->parse_url_into_model( $url, $model );

        my $parser     = RDF::Trine::Parser->new( 'turtle' );
        $parser->parse_into_model( $base_uri, $rdf, $model );

        $parser->parse_file_into_model( $base_uri, 'data.ttl', $model );

DESCRIPTION

       RDF::Trine::Parser is a base class for RDF parsers. It may be used as a factory class for
       constructing parser objects by name or media type with the "new" method, or used to
       abstract away the logic of choosing a parser based on the media type of RDF content
       retrieved over the network with the "parse_url_into_model" method.

METHODS

       "media_type"
           Returns the canonical media type associated with this parser.

       "media_types"
           Returns the media types associated with this parser.

       "parser_by_media_type ( $media_type )"
           Returns the parser class appropriate for parsing content of the specified media type.
           Returns undef if not appropriate parser is found.

       "guess_parser_by_filename ( $filename )"
           Returns the best-guess parser class to parse a file with the given filename.  Defaults
           to RDF::Trine::Parser::RDFXML if not appropriate parser is found.

       "new ( $parser_name, @args )"
           Returns a new RDF::Trine::Parser object for the parser with the specified name (e.g.
           "rdfxml" or "turtle"). If no parser with the specified name is found, throws a
           RDF::Trine::Error::ParserError exception.

           Any @args will be passed through to the format-specific parser constructor.

           If @args contains the key-value pair "(canonicalize => 1)", literal value
           canonicalization will be attempted during parsing with warnings being emitted for
           invalid lexical forms for recognized datatypes.

       "parse_url_into_model ( $url, $model [, %args] )"
           Retrieves the content from $url and attempts to parse the resulting RDF into $model
           using a parser chosen by the associated content media type.

           If %args contains a 'content_cb' key with a CODE reference value, that callback
           function will be called after a successful response as:

            $content_cb->( $url, $content, $http_response_object )

           If %args contains a 'useragent' key with a LWP::UserAgent object value, that object is
           used to retrieve the requested URL without any configuration (such as setting the
           Accept: header) which would ordinarily take place. Otherwise, the default user agent
           ("default_useragent" in RDF::Trine) is cloned and configured to retrieve content that
           will be acceptable to any available parser.

       "parse_url ( $url, \&handler [, %args] )"
           Retrieves the content from $url and attempts to parse the resulting RDF.  For each
           parsed RDF triple that is parsed, &handler will be called with the triple as an
           argument. Otherwise, this method acts just like "parse_url_into_model".

       "parse_into_model ( $base_uri, $data, $model [, context => $context] )"
           Parses the bytes in $data, using the given $base_uri. For each RDF statement parsed,
           will call "$model->add_statement( $statement )".

       "parse_file_into_model ( $base_uri, $fh, $model [, context => $context] )"
           Parses all data read from the filehandle or file $fh, using the given $base_uri. For
           each RDF statement parsed, will call "$model->add_statement( $statement )".

       "parse_file ( $base_uri, $fh, $handler )"
           Parses all data read from the filehandle or file $fh, using the given $base_uri. If
           $fh is a filename, this method can guess the associated parse. For each RDF statement
           parsed, "$handler->( $st )" is called.

       "parse ( $base_uri, $rdf, \&handler )"
       "new_bnode_prefix ()"
           Returns a new prefix to be used in the construction of blank node identifiers.  If
           either Data::UUID or UUID::Tiny are available, they are used to construct a globally
           unique bnode prefix. Otherwise, an empty string is returned.

       "default_accept_header"
           Returns the default HTTP Accept header value used in requesting RDF content (e.g. in
           "parse_url_into_model") that may be parsed by one of the available RDF::Trine::Parser
           subclasses.

           By default, RDF/XML and Turtle are preferred over other media types.

BUGS

       Please report any bugs or feature requests to through the GitHub web interface at
       <https://github.com/kasei/perlrdf/issues>.

AUTHOR

       Gregory Todd Williams  "<gwilliams@cpan.org>"

COPYRIGHT

       Copyright (c) 2006-2012 Gregory Todd Williams. This program is free software; you can
       redistribute it and/or modify it under the same terms as Perl itself.