<http://cn.comsol.com/blogs/category/interfacing/cad-import-and-livelink-products-for-cad/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://cn.comsol.com/blogs/category/interfacing/cad-import-and-livelink-products-for-cad/>