Dataset Open Access
The Webis Search Mission Corpus 2012 (Webis-SMC-12) contains 8840 search engine interactions of 127 users. Two human annotators divided these interactions into 2881 logical sessions and 1378 missions. Cases where the annotators did not agree initially were discussed to reach a consensus.
Matthias Hagen, Jakob Gomoll, Anna Beyer, and Benno Stein. From Search Session Detection to Search Mission Detection. In 10th International Conference Open Research Areas in Information Retrieval (OAIR 2013), pages 85-92, May 2013. ACM