Runtime tools : Core components : Web services access : Accessing Web services : Defining the Web services mapper : Prerequisites
  
Prerequisites
To enable the Web services mappers for use, you must first declare the implementation classes of the Web services mappers in the btt.xml file. To declare the implementation classes, you must add the following two fields to the classTable kColl of the format kColl in the btt.xml file:
<field id="wsMapperConverter" value="com.ibm.btt.base.ws.WSMapperConverter" />
<field id="mapper" value="com.ibm.btt.base.DataMapperFormat" />
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Defining the Web services mapper