10. A system, comprising: a processor; an interface to receive a selection of a particular logical field via a database query interface; and a computer readable storage medium configured to store: a data abstraction model of a database, wherein the data abstraction model includes a plurality of logical fields, wherein each logical field of the plurality of logical fields corresponds to a particular data structure of the database; a discovery registry associated with the data abstraction model of the database, wherein the discovery registry associates a plurality of web services with a plurality of logical fields of the data abstraction model; a resolver executable by the processor to: query the discovery registry to discover one or more web services of the plurality of web services that are resolvable based on the particular logical field received via the database query interface, wherein a web service input of a particular discovered web service is associated with a first logical field of the data abstraction model via the discovery registry, and wherein a web service output of the particular discovered web service is associated with a second logical field of the data abstraction model via the discovery registry; initiate execution of a first discovered web service of the one or more discovered web services, wherein a first list of values is returned upon execution of the first discovered web service; and augment the first list of values from the first discovered web service with information determined based on field relationship metadata of the data abstraction model, wherein the field relationship metadata corresponds to the first list of values, wherein the first list of values is augmented by one or more field “IS A” relationships that are identified via the data abstraction model and used for term expansion, and wherein when an identified “IS A” relationship is such that an output of the first discovered web service is a subclass, the first list of values are used directly in a query for a user defined condition.
10. A system, comprising: a processor; an interface to receive a selection of a particular logical field via a database query interface; and a computer readable storage medium configured to store: a data abstraction model of a database, wherein the data abstraction model includes a plurality of logical fields, wherein each logical field of the plurality of logical fields corresponds to a particular data structure of the database; a discovery registry associated with the data abstraction model of the database, wherein the discovery registry associates a plurality of web services with a plurality of logical fields of the data abstraction model; a resolver executable by the processor to: query the discovery registry to discover one or more web services of the plurality of web services that are resolvable based on the particular logical field received via the database query interface, wherein a web service input of a particular discovered web service is associated with a first logical field of the data abstraction model via the discovery registry, and wherein a web service output of the particular discovered web service is associated with a second logical field of the data abstraction model via the discovery registry; initiate execution of a first discovered web service of the one or more discovered web services, wherein a first list of values is returned upon execution of the first discovered web service; and augment the first list of values from the first discovered web service with information determined based on field relationship metadata of the data abstraction model, wherein the field relationship metadata corresponds to the first list of values, wherein the first list of values is augmented by one or more field “IS A” relationships that are identified via the data abstraction model and used for term expansion, and wherein when an identified “IS A” relationship is such that an output of the first discovered web service is a subclass, the first list of values are used directly in a query for a user defined condition. 11. The system of claim 10 , wherein the first discovered web service is a cost effectiveness service.