'<p class=bio><img src=/images/tools/speakers/kleppe.jpg width=100 align=left><b>Anneke Kleppe</b> is an independant consultant in the area of object technology within her own company called Klasse Objecten (in English that would translate to &quot;Class Objects&quot;). Her job is to coach and train companies working with object technology. Some of the companies she has worked for are PTT Telecom, NCR Nederland NV, IBM Education and Training and the Dutch governement.  Before founding her own company Anneke has worked for the  Dutch PTT Research. There she has worked on the subjects  of conformance testing (TTCN), formal specification languages  (LOTOS) and object technology and has been part of projects that have made extensive use of OMT and C++ or Smalltalk. <p class=bio><img src=/images/tools/speakers/warmer.jpg width=100 align=left><b>Jos Warmer</b> has been active in the OT community since 1985. Currently he is working at Klasse Objecten as senior consultant. He used to work within IBM\'s European Object Technology Practice (OTP). Since March 1997, he co-authored the UML 1.1 proposal for the OMG. He is still responsible for the Object Constraint Language with the OMG\'s UML core team. He is the chief architect of OCL.  Before Jos joined IBM\'s OTP he has been working as trainer, mentor and consultant. During these years he initiated many IT professionals in object technology. Earlier he worked for the Dutch PTT Research and PTT Telecom where he introduced the use of object technology in many projects and departments. The basis of his experience with object technology was build during his years with the Vrije Universiteit and the Center for Mathematics and Computer Science in Amsterdam, where he was one of the early users of C++ and Eiffel.  <p class=bio>Anneke Kleppe and Jos warmer are the authors of  &quot;The Object Constraint Language: Precise Modeling with UML&quot;, &quot;Praktisch OMT&quot; and &quot;Practisch UML&quot; (all Addison-Wesley).'