In some of the earlier versions of the module, you did need to catch triples via the callbacks, but as of 0.10 that is no longer necessary (though it's still possible, and allows you to do some interesting things).

In this case, I think the empty string URI is causing the problem. You need to plug in the URI of the page being parsed here. (If you don't know the URI, you could always put something like 'http://invalid.invalid/'.)

Here's an example usage which should work:

use Data::Dumper;
use LWP::Simple;
use RDF::RDFa::Parser;

my $uri = 'http://www.w3.org/2006/07/SWD/RDFa/testsuite/xhtml1-testcas
+es/0058.xhtml';
my $parser = RDF::RDFa::Parser->new(get($uri), $uri);
$parser->consume;
print Dumper( $parser->graph );

[download]

In reply to Re^2: Parsing CC licenses by tobyink
in thread Parsing CC licenses by punkish

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.