Thread:Extension talk:RDFa/Code outdated? Can't get it to work with SMW 1.7

Hello,

I'm trying to use the RDFa extension 0.0.3 with SemanticMediaWiki 1.7 and MediaWiki 1.18.1, but I get the following error when entering the wiki:

I don't know programming in PHP and can't solve the error by myself, but the last version seems a bit old, I think this could be the reason...

If someone can help, thank you very much!

Ah, and the ARC2 library is now at this place:.