R2303: A DESCRIPTION MUST NOT use Solicit-Response and Notification type operations in a wsdl:portType definition. Un document WSDL décrit un service Web. The types element is a container for data type definitions. This tutorial shows you how to write contract-first Web services, that is, developing web services that start with the XML Schema/WSDL contract first followed by the Java code second.Spring-WS focuses on this development style, and this tutorial will help you get started. Slovaque / Slovenčina Is Thursday a “party” day in Spain or Germany? Notification: Sends a message but does not wait for a response. I know about these two.