Incompatibility with RDF Module.

Pushing this over to the RDF queue.

The above described error happens because the rdf module sets the value of a constant using a function the moment the rdf.module file is included.

define('RDF_SCHEMA_URI',        rdf_get_schema_uri());

The `rdf_get_schema_uri()` method calls `url()` which in turn will ask purl to examine the url. However, because all of this is happening the moment the rdf.module file is included, `ctools_include()` isn't yet available the page load fails.

Is there a reason that the 'RDF_SCHEMA_URI' constant is being set like this?

Any news on this ? Making OA and Fileframework work would be so-oh nice...

I tried to replace to define('RDF_SCHEMA_URI', rdf_get_schema_uri()) stuff by a variable_set('rdf_schema_uri', rdf_get_schema_uri()) in all files where the constant is called, but it's not working. Is it a good approach ? Should we try putting some effort in this, since it's blocking rdf working with purl, which means it's blocking FileFramework to work with OA ?

I was trying to install purl and space and kept getting WSOD with error call to undefined function ctools_includes()

came across this post http://drupal.org/node/872340

changing line 964 of rdf.module from

<?php

function rdf_get_schema_uri() {
 
$uri = 'rdf/schema';
 
$uri = (function_exists('url') ? url($uri, array('absolute' => TRUE)) : $uri) . '/';
 
return variable_get('rdf_schema_uri', $uri);
 
}
?>

<?php

function rdf_get_schema_uri() {
 
$uri = $base_url.'rdf/schema/';
return variable_get('rdf_schema_uri', $uri);
 
}
?>

this fixed the WSOD issue, but haven't set up spaces, purl or rdf yet to see if it causes any issues.

This also worked for me