1. Arkin, A., Askary, S., Fordin, S., Jekeli, W., Kawaguchi, K., Orchard, D., Pogliani, S., Riemer, K., Struble, S., Takacsi-Nagy, P., Trickovic, I., Zimek, S.: Web service choreography interface (WSCI) 1.0 (2002), http://www.w3.org/TR/wsci
2. Barbon, F., Traverso, P., Pistore, M., Trainotti, M.: Run-time monitoring of instances and classes of web service compositions. In: ICWS, pp. 63–71. IEEE Computer Society, Los Alamitos (2006)
3. Berglund, A., Boag, S., Chamberlin, D., Fernández, M.F., Kay, M., Robie, J., Siméon, J.: XML path language (XPath) version 2.0, W3C recommendation (2007), http://www.w3.org/TR/xpath20
4. Boag, S., Chamberlin, D., Fernández, M.F., Florescu, D., Robie, J., Siméon, J.: XQuery 1.0: An XML query language, W3C working draft (2005), http://www.w3.org/TR/xquery/
5. Bultan, T., Fu, X., Hull, R., Su, J.: Conversation specification: a new approach to design and analysis of e-service composition. In: WWW, pp. 403–410 (2003)