Redland RDF Libraries 1.0.8 (Development branch)


 
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Old 07-06-2008
Redland RDF Libraries 1.0.8 (Development branch)

Redland is a set of C libraries providing a high-level API for the Resource Description Framework (RDF), allowing it to be stored, parsed, serialized, queried, and manipulated. It has an object-based, modular design and comes with detailed reference documentation and examples. APIs are provided in C#, C, Perl, Python, Ruby, PHP, Java, and Tcl. Redland supports all RDF vocabularies such as FOAF, RSS 1.0, Dublin Core, DOAP, and OWL, the query languages RDQL and SPARQL, and all RDF syntaxes including Turtle, RDF/XML, RSS, Atom, and GRDDL. License: GNU Lesser General Public License (LGPL) Changes:
Redland was updated to use the new Rasqal 0.9.16 API (incompatible with earlier versions) and was updated to use Raptor 1.4.18. A new "trees" indexed in-memory storage was added. Improvements were made to low-memory and other failures of resource allocation. Some minor API additions and changes were made to the concepts, parser, and serializer classes.Image

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RDF::Redland(3pm)					User Contributed Perl Documentation					 RDF::Redland(3pm)

NAME
RDF::Redland - Redland RDF Class SYNOPSIS
use RDF::Redland; my $storage=new RDF::Redland::Storage("hashes", "test", "new='yes',hash-type='memory'"); my $model=new RDF::Redland::Model($storage, ""); ... DESCRIPTION
This class initialises the Redland RDF classes. See the main classes for full detail: RDF::Redland::Node, RDF::Redland::BlankNode, RDF::Redland::URINode, RDF::Redland::LiteralNode, RDF::Redland::XMLLiteralNode, RDF::Redland::URI, RDF::Redland::Statement, RDF::Redland::Model, RDF::Redland::Storage, RDF::Redland::Parser, RDF::Redland::Query, RDF::Redland::QueryResults, RDF::Redland::Iterator, RDF::Redland::Stream and RDF::Redland::RSS. STATIC METHODS
set_log_handler SUB Set SUB as the subroutine to be called on any Redland error, warning or log message. The subroutine must have the followign signature: sub handler ($$$$$$$$$) { my($code, $level, $facility, $message, $line, $column, $byte, $file, $uri)=@_; # int error code # int log level # int facility causing the error (parsing, serializing, ...) # string error message # int line number (<0 if not relevant) # int column number (<0 if not relevant) # int byte number (<0 if not relevant) # string file name or undef # string URI or undef # ...do something with the information ... }; RDF::Redland::set_log_handler(&handler); reset_log_handler Reset redland to use the default logging handler, typically printing the message to stdout or stderr and exiting on a fatal error. set_error_handler SUB The method set_log_handler is much more flexible than this and includes this functionality. Set SUB as the subroutine to be called on a Redland error with the error message as the single argument. For example: RDF::Redland::set_error_handler(sub { my $msg=shift; # Do something with $msg }); The default if this is not set, is to run die $msg set_warning_handler SUB The method set_log_handler is much more flexible than this and includes this functionality. Set SUB as the subroutine to be called on a Redland warning with the warning message as the single argument. For example: RDF::Redland::set_warning_handler(sub { my $msg=shift; # Do something with $msg }); The default if this is not set, is to run warn $msg SEE ALSO
RDF::Redland::Node, RDF::Redland::BlankNode, RDF::Redland::URINode, RDF::Redland::LiteralNode, RDF::Redland::XMLLiteralNode, RDF::Redland::URI, RDF::Redland::Statement, RDF::Redland::Model, RDF::Redland::Storage, RDF::Redland::Parser, RDF::Redland::Query, RDF::Redland::QueryResults, RDF::Redland::Iterator, RDF::Redland::Stream and RDF::Redland::RSS. AUTHOR
Dave Beckett - http://www.dajobe.org/ perl v5.14.2 2012-03-11 RDF::Redland(3pm)