Objective evaluation and comparison of knowledge-based tools has so far been mostly an elusive goal for researchers and developers. Objective experiments are difficult to perform and require substantial resources. The EON Ontology Alignment Contest attempts to overcome these problems in inviting tool developers to perform a series of experiments in ontology alignment and compare their results to the reference alignments produced by experiment authors. We used our PROMPT suite of tools in the experiment. We briefly describe PROMPT in the paper and present our results. Based on this experience, we share our thoughts on the experiment design, its positive and negative aspects, and talk about lessons learned and ideas for future such experiments and contests.
