Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Databases, with their partially extended ontological class trees, whose content was searched via Semantic Protocol and RDF Query Language (SPARQL) using Knowledge Explorer (KE) [34,40]. Retrieved results were imported, harmonized and mapped to this ontology to create a Semantic Knowledge Base.
