GoPubMed – Ontology-based Literature Search
http://www.gopubmed.com/

Search PubMed for biomedical research articles. Your keywords are submitted to PubMed and the resulting abstracts are classified using Gene Ontology terms. GeneOntology is a hierarchical vocabulary for molecular biology covering cellular components, biological processes and molecular functions. This has been added to Biological Informatics Subject Tracer™ Information Blog. This has been added to the source code of eHealthcareBot search engine.