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RDF::Core::Serializer(3pm) User Contributed Perl Documentation RDF::Core::Serializer(3pm)
NAME
RDF::Core::Serializer - produce XML code for RDF model
SYNOPSIS
require RDF::Core::Serializer;
my %options = (getSubjects => \&getSubjectsHandler,
getNamespaces => \&getNamespacesHandler,
getStatements => \&getStatementsHandler,
countStatements => \&countStatementsHandler,
existsStatement => \&existsStatementHandler,
BaseURI => 'http://www.foo.com/',
);
my $serializer = new RDF::Core::Serializer(%options);
$serializer->serialize;
DESCRIPTION
Serializer takes RDF data provided by handlers and generates a XML document. Besides the
trivial job of generating one description for one statement the serializer attempts to
group statements with common subject into one description and makes referenced
descriptions nested into referencing ones. Using baseURI option helps to keep relative
resources instead of making them absolute. Blank nodes are preserved where possible,
though the new rdf:nodeID attribute production is not implemented yet.
Interface
o new(%options)
Available options are:
o getSubjects
A reference to a subroutine that provides all distinct subjects in serialized
model.
o getNamespaces
A reference to a subroutine that provides all predicates' namespaces.
o getStatements($subject, $predicate, $object)
A reference to a subroutine that provides all statements conforming given mask.
o existsStatement($subject, $predicate, $object)
A reference to a subroutine that returns true if a statement exists conforming the
mask.
o Output
Output can be assigned a filehandle reference (a reference to a typeglob or
FileHandle object), or a reference to a scalar variable. If a filehendle is set,
serializer assumes it's open and valid, just prints there and doesn't close it. If
a variable is set, XML is appended to it. Serializer writes to STDOUT with
default settings.
o BaseURI
A base URI of a document that is created. If a subject of a statement matches the
URI, rdf:about attribute with relative URI is generated.
o InlinePrefix
When rdf:nodeID attribute is assigned to an anonymous resource, it's generated as
InlinePrefix concatenated with unique number. Unique is meant in the scope of the
document. Default prefix is 'genid'.
o serialize
Does the job.
Handlers
getSubjects should return an array of references, each reference pointing to an array of
one item ($subject), where $subject is a reference to RDF::Core::Resource. (I.e. "$subject
= $returnValue->[$someElementOfArray]->[0]")
getNamespaces should return a hash reference where keys are namespaces and values are
namespace prefixes. There must be a rdf namespace present with value 'rdf'
getStatements($subject, $predicate, $object) should return all statements that match given
mask. That is the statements' subject is equal to $subject or $subject is not defined and
the same for predicate and subject. Return value is a reference to RDF::Core::Enumerator
object.
countStatements($subject, $predicate, $object) should return number of statements that
match given mask.
existsStatement($subject, $predicate, $object) should return true if exists statement that
matches given mask and false otherwise.
LICENSE
This package is subject to the MPL (or the GPL alternatively).
AUTHOR
Ginger Alliance, rdf AT gingerall.cz
SEE ALSO
FileHandle, RDF::Core::Model::Serializer, RDF::Core::Enumerator
perl v5.10.0 2006-07-12 RDF::Core::Serializer(3pm)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-25 01:45 @38.107.179.237 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)