A method includes receiving a selection of a logical field of a data abstraction model. The method includes determining model entries (e.g., concepts) associated with the selected logical field and examining the data abstraction model to determine other model entries that are equal to the model entries associated with the selected logical field. For each equal model entry, the method includes determining web services to be used in performing a search, where the web services are determined by querying a discovery registry associated with the data abstraction model to discover one or more web services that are resolvable based on the selected logical field. A first discovered web service is executed with user supplied criteria provided via a user interface to obtain a list of values. A condition is created that limits acceptable values associated with the selected logical field based on the user supplied criteria.