In this talk we are going to  present  the Semantic Publishing Instance Matching Benchmark (SPIMBENCH) developed in the context of the Linked Data Benchmark Council EU project (http://ldbcouncil.org/). SPIMBench  allows the benchmarking of instance matching systems against not only structure-based and value-based test cases, but also against semantics-aware test cases based on OWL axioms. The benchmark features a scalable data generator and a weighted gold standard that can be used for debugging instance matching systems and for reporting how well they perform in various matching tasks.