Warning: {W130} Base URI is "", relative URIs left as relative.

The warning {W130} Base URI is "", relative URIs left as relative. is given when i try to import an owl file using jena api.

The solution is from here: http://tech.groups.yahoo.com/group/jena-dev/message/5266

Specifically, adding the following lines to .owl file solved my problem:

xmlns="http://Mpeg7-2001.owl#"

xml:base="http:///Mpeg7-2001.owl#"