An Extension of WSDL for Flexible Web Service Invocation With Large Data

Traditional web services are limited in the request-reply framework, where service invocation can only be bundled together with all relevant data in a single message. However, more and more services require large datasets (e.g., multimedia and scientific data). Under the WSDL standards, these datasets must be ported to an appropriate message format and transferred in their entirety upon each service invocation or response. A strategy to solve this problem which is called WSDL-D is to separate invocation messages from their datasets. Such a separation ultimately grants service consumers the ability to pass parameter datasets from third party hosts, to maintain dataset parameters on the service provider host for use with future service invocations, and to provide datasets in a variety of different formats