NAME

RDF::RDFa::Generator - generate some data in RDFa

DESCRIPTION

Constructor

$gen = RDF::RDFa::Generator->new(style => $style, %options)

Creates a new generator object. $style is one of the following case-sensitive strings: 'HTML::Head' (the default), 'HTML::Hidden' or 'HTML::Pretty'. You can also construct an object like this:

  $gen = RDF::RDFa::Generator::HTML::Head->new(%options);

Options include:

• base - the base URL where the output data will be published. This allows in some cases for the generated RDFa to include relative URIs.

• data_context - if non-null, a URI (string) which indicates the context (named graph) containing the data to generate RDFa for.

• namespaces - a {prefix=>uri} hashref of preferred CURIE prefixes.

• ns - a {uri=>prefix} hashref of preferred CURIE prefixes. DEPRECATED - use namespaces instead.

• prefix_attr - use the @prefix attribute for CURIE prefixes (RDFa 1.1 only). Boolean, defaults to false.

• safe_xml_literals - prevents XML literals from injecting arbitrary XHTML into the output. Boolean, defaults to FALSE.

• title - assign a <title> element for generated XHTML documents.

• version - set generated RDFa version. Valid values are '1.0' (the default) or '1.1'.

Public Methods

$gen->create_document($model)

Creates a new RDFa file containing triples. $model is an RDF::Trine::Model object providing the triples. Returns an XML::LibXML::Document object suitable for serialising using its toString method.

If you're planning on serving the RDFa with the text/html media type, then it is recommended that you use HTML::HTML5::Writer to serialise the document rather than toString.

Can also be called as a class method:

 $document = RDF::RDFa::Generator->create_document($model)
 # Same as:
 # $document = RDF::RDFa::Generator->new->create_document($model)

$gen->inject_document($document, $model)

Injects an existing document with triples. $document is an XML::LibXML::Document to inject, or a well-formed XML string. $model is an RDF::Trine::Model object providing the triples. Returns an XML::LibXML::Document object suitable for serialising using its toString method.

See create_document for information about serving the RDFa with the text/html media type.

Can also be called as a class method. See create_document for details.

$gen->nodes($model)

Provides triple-laden XML::LibXML::Elements to be added to a document. $model is an RDF::Trine::Model object providing the triples. If called in list context, returns a list of XML::LibXML::Element objects which can be added to a document; otherwise returns an XML::LibXML::NodeList containing a list of such elements.

Can also be called as a class method. See create_document for details.

The HTML::Pretty generator can be passed a couple of additional options:

  $gen->nodes($model, notes_heading=>'Additional Info', notes=>\@notes);

The notes are a list of RDF::RDFa::Generator::HTML::Pretty::Note objects which are added as notes to the end of each subject's data.

Additionally the methods serialize_model_to_file, serialize_model_to_string, serialize_iterator_to_file and serialize_iterator_to_string are provided for compatibility with the RDF::Trine::Serializer interface.

BUGS

Please report any bugs to http://rt.cpan.org/.

SEE ALSO

HTML::HTML5::Writer, XML::LibXML, RDF::RDFa::Parser, RDF::Trine, RDF::Prefixes.

http://www.perlrdf.org/.

AUTHOR

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE

Copyright (C) 2010 by Toby Inkster

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8 or, at your option, any later version of Perl 5 you may have available.

Icons

RDF::RDFa::Generator::HTML::Pretty uses the FamFamFam Silk icons; see http://famfamfam.com/lab/icons/silk/.