The Jena GRDDL Reader is an implementation of GRDDL for the Jena Semantic Web Framework, using the Saxon XSLT Processor from Saxonica Limited.
Jena is open source and grown out of work with the HP Labs Semantic Web Programme.
Usage Instructions
The GRDDL Reader requires Jena 2.5.1 or later, and Java 1.5.X or later.
To use the GRDDL reader: first familiarize yourself
with the security issues,
then simply add the
jars from the GRDDL download to your classpath,
and use "GRDDL" as a language option
to the read() methods of a Jena Model,
or to a commandline tool such as jena.copy.
Documentation
The documentation covers the options that
can be set on the reader using the RDFReader.setProperty()
method.
Conformance
None.
As of 31st January 2007, the goal is to be a liberal implementation of the next publication of the GRDDL working draft.
When reading HTML,
nekohtml
is used to
tidy up the HTML, and to read it as XHTML 1.0.
Also, some of the keywords such as "transformation"
are matched case insensitively.
This may result in GRDDL readings of HTML documents
that are not strictly licensed by the specification.
When reading XML, a stricter approach is used.
The Jena GRDDL reader
supports transforms in
XSLT 2.0
(excluding schema processing,
unparsed-text()
,
document()
and
<xsl:result-document>).
Transforms in XSLT 1.0 are executed using XSLT 2.0
backward compatibility mode. No warning is issued
concerning this.
The output of a transform
is read as RDF/XML, unless it explicitly
has mimetype text/rdf+n3, in which case it
is read as N3.
Support
Support is provided by the jena-dev mailing list.
