<p>SemLens is a tool for visualizing and analyzing RDF data <span>developed as part of the Visual Data Web toolset and based on the Adobe Flex open source framework. Using SPARQL to access the user's dataset, it arranges RDF data into a scatter plot which can be analyzed via semantic lenses generated based on the dataset, and with logical operators. The tool provides a global overview of the user's dataset, and can do so even for large datasets.</span></p>