* Visual Semantic Web design tool for RDF and OWL. Altova SemanticWorks is a visual RDF/OWL editor. With Altova SemanticWorks you can visually design Semantic Web instance documents, vocabularies, and ontologies then output them in either RDF/XML or N-triples formats. Altova SemanticWorks streamlines the job with tabs for classes, properties, instances, etc., context-sensitive entry helpers, and automatic format checking.