rdf 6.x-1.0-alpha2

A second relatively stable development snapshot for Drupal 6.x.

Changes since 6.x-1.0-alpha1:

• Updated ARC2 compatibility (now works with release 2008-05-30).
• Fixed white-screening bug when exporting RDF data (#261237, #242509, #243971).
• Fixed repository administration menu paths.
• Implemented unit tests for the RDF repository create/rename/delete APIs.
• Implemented unit tests for the RDF statement count/insert/query/delete APIs.
• Added a bunch of the FOAF terms to the predefined, auto-generated convenience classes.
• Clear the schema cache in rdf_db_create_repository().
• Implemented hook_schema_alter() for defining the schema for user-created repository tables.
• Added new API functions rdf_get_type() and theme_rdf_value().
• Simplified QName/CURIE creation by implementing a $rdf_namespaces global.
• Merged the RDF DB hook implementations with the existing RDF API handlers.
• Bug fix for rdf_count().
• Optimized rdf_literal() to not construct an RDF_Literal object for plain non-tagged string literals.
• Allowed non-wrapped object literals in rdf_denormalize() for greater convenience.

Note: This is experimental software meant for advanced users; assume nothing works, and you may be pleasantly surprised. And when it breaks, you get to keep both pieces.