For everybody having Problems importing the Freebase Dump:
1) Keep your RDF/Turtle Parser updated. (Latest Version of raptor 2 can recognize the '.', e.g. at ns:common.topic.notable_for.example
2) The dump must be cleaned up before you can import it. I used this scipt: http://people.apache.org/~andy/Freebase20121223/ (fixit)
3) The Turtle specification only allows these characters for URIs:
::= '<' ([^#x00-#x20<>\"{}|^`\] | UCHAR)* '>'
So it's very important to add this line to the fixit script at line 80:
$X =~ s/\\>/%3E/g ;
$X =~ s/\\.//g ;
# Add this Line
$X =~ [\x00-\x20\<\>\"\{\}\|\^\`] ;
$obj = "<".$X.">" ;
As a result, invalid syntax like this:
<http://www.wikipedia.org/object?key={invalid_braces}>
becomes
<http://www.wikipedia.org/object?key=invalid_braces>