This book is concerned with the study and analysis of search engines and page rank algorithm in semantic space. Several search engines have been proposed, which allow increasing information retrieval accuracy by exploiting a key content of semantic web resources, ie relations. However, in order to rank results, most of the existing solutions need to work on the whole annotated knowledge base.The proposed case and relation based page rank algorithm is designed based on query definition process using ontological relations. The proposed architecture uses a hybrid methodology named case and...