Christian Zirpins Guadalupe Ortiz Yen-Jao Chung Wolfgang Emmerich Introduction: Fourth International Workshop on Engineering Service-Oriented Applications (WESOA 2008). 3-4 2008 ICSOC Workshops http://dx.doi.org/10.1007/978-3-642-01247-1_1 conf/icsoc/2008w db/conf/icsoc/icsoc2008w.html#ZirpinsOCE08