A service can be created either from a CRUD form or from a Zoom form. From a
CRUD form the web service can have Create, Read, Update, and/or Delete operations. From a Zoom form,
operations are limited to Read.     
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Open the BA Diagram and select a form. 
 
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In the properties view, enter the service name into the service name property. Service CRUD
operations apply on the records (data sets) that are already defined in the form. A new data set is
not necessary, but the data set can be customized. 
 
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Compile the form. The service is created during form compilation.