NAME RDF::Prefixes - simple way to turn URIs into QNames SYNOPSIS my $context = RDF::Prefixes->new; say $context->qname('http://purl.org/dc/terms/title'); # dc:title say $context->qname('http://example.net/rdf/dc#title'); # dc2:title say $context->turtle; # @prefix dc: . # @prefix dc2: . DESCRIPTION Constructor "new(\%suggestions, \%options)" Creates a new RDF prefix context. Suggestions for prefix mappings may be given, but there's no guarantee that they'll be used. The only option right now is 'syntax' that is used by the toString method. Both hashrefs are optional. Methods "get_prefix($uri)" Gets the prefix associated with a URI. e.g. "get_prefix('http://purl.org/dc/terms/')" might return 'dc'. "get_qname($uri)" Gets a QName for a URI. e.g. "get_prefix('http://purl.org/dc/terms/title')" might return 'dc:title'. Some URIs cannot be converted to QNames. In these cases, undef is returned. "get_curie($uri)" As per "get_qname", but allows for more relaxed return values, suitable for RDFa, Turtle or Notation 3, but not RDF/XML. Should never need to return undef. "preview_prefix($uri)", "preview_qname($uri)", "preview_curie($uri)" As per the "get" versions of these methods, but doesn't modify the context. "to_hashref" Returns a hashref of prefix mappings used so far. This is not especially necessary as the object may be treated as a hashref directly: foreach my $prefix (keys %$context) { printf("%s => %s\n", $prefix, $context->{$prefix}); } "rdfa" Return the same data as "to_hashref", but as a string suitable for placing in an RDFa 1.1 prefix attribute. "sparql" Return the same data as "to_hashref", but as a string suitable for prefixing a SPARQL query. "turtle" Return the same data as "to_hashref", but as a string suitable for prefixing a Turtle or Notation 3 file. "xmlns" Return the same data as "to_hashref", but as a string of xmlns attributes, suitable for use with RDF/XML or RDFa. "to_string" Calls either "rdfa", "sparql", "turtle" (the default) or "xmlns", based on the 'syntax' option passed to the constructor. This module overloads the stringification operator, so calling toString is not usually needed. my $context = RDF::Prefixes->new({}, {syntax=>'turtle'}); my $dc_title = 'http://purl.org/dc/terms/title'; print "# Prefixes\n" . $context; BUGS Please report any bugs to . AUTHOR Toby Inkster . COPYRIGHT Copyright 2010 Toby Inkster This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.