Consuming external web services in SAP Data Services functionality requires configuring the software's built-in web services datastore type. The web services datastore provides support for locating and importing metadata for a web services server as well as invoking web service operations.
The web services datastore works by sending a request and waiting until it receives a reply from a web services server.
For example, you might create a web services server as a front-end to a legacy application. You could call the web services server daily from a data flow to access inventory and update an inventory data mart.
The interaction between the web services datastore and an external web service has these parts:
1. Creating a web services datastore that identifies the WSDL, which describes the web services server.
2. Importing metadata to extract the information form the WSDL needed to access the web service server.
3.Creating a data flow that uses the imported function call to call the web services server.

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