The ISLab Instance Matching Benchmark (IIMB 2009) is a benchmark automatically created by the ISLab group using one data source and modifying it according to various criterias.

The objective of the benchmark is to evaluate the results of instance matching algorithms. The aim of these algorithms is to find out, as better as possible, the instance belonging to one or more ontologies which are referred to the same object in the real world.

The benchmark is about movies. In particular, the movie instances belonging to the source abox had been extracted from the IMDb Web site (http://www.imdb.com).
The reference ontology contains 5 named classes, 4 object properties, 13 datatype properties and 302 individuals.

The IIMB 2009 benchmark and the related description is available at http://islab.dico.unimi.it/content/iimb2009