构建语义网，本体推理，语义检索。OWL/RDF文件解析。(Jena is a Java framework for building semantic web applications. It provides tools and Java libraries to help you to develop semantic web and linked-data apps, tools and servers.)

Jena API 的使用说明，包括简单的使用示例，是《An Introduction to RDF and the Jena RDF API》的译文(The use of Jena API, including the simple use example, is the translation of "An Introduction to RDF and the Jena API RDF")