isabelle import: found new errors in RDF files

timeline/week18.txt

@@ -37,6 +37,13 @@ Week 18 (27.04.-03.05.)
 		   characters; the lowest of the range is 0xa0, which
 		   is below 0x7c (the pipe symbol)
 
+		-> importing the files w/ fixed IRIs I get new errors
+                   from graphDB (sigh)
+
+		     RDF Parse Error: The processing instruction target matching "[xX][mM][IL}' is not allowed
+
+		   e.g. w/ file Flow_Networks.Graph_Impl.rdf.gz
+
 	[ ] run all quries from ulo paper in graphdb
 
 [ ] fix exported IRIs