Debugging of Queries in SPARQL
The debugging of database queries is a topic of research of increasing interest in recent years. The Semantic Web query language SPARQL should be equipped with a debugger for helping users to detect bugs which usually cause empty results as well as wrong and missing answers. Declarative debugging is a well-known debugging method successfully used in other database query languages. In this page, a web tool is available representing the elements of a declarative debugger for SPARQL, in which the debugging is based on the building of a debugging tree for a given answer, and the detection of buggy and failure nodes in the debugging tree causing empty results as well as wrong and missing answers.
In order to test the debugger, please clik on the next button, using the following credentials, username: guess, password: guess