<definitions> Define the name of the web service Declare multiple namespaces used throughout the remainder of the document, and contains all the service elements described here <types> Describe all the data types used between client and server Use the W3C XML schema as its default choice <message> Describe a one-way message, whether it is a single message request or a single message response Define the name of the message and contain zero or more message part elements, which can […]
WSDL describes the operational information – where the service is located, what the service does, and how to talk to (invoke) the service To know how to send messages to a particular WS, an application can look at the WSDL and dynamically construct SOAP messages WSDL can be thought of as an XML form of CORBA’s Interface Definition Language (IDL) When you create a Web service from the enterprise applications, most toolkits create WSDL for you <types>: What data types will be transmitted? <message>: What […]
DISCOVER (UDDI, ebXML registries) DESCRIBE (WSDL) ACCESS (SOAP) XML COMMUNICATION LAYER (HTTP, SMTP…) Dynamically Discover information about WS
Universal Discovery Description Integration Registry API Data Structures Protocol Introduced in 2000 by Ariba, Microsoft, and IBM Public registry is now dissolved – 2007 Typical Use Registration – Organizations can register public information about their WS and types of services Discovery – Applications can view information about these WS Comprise 3 parts White pages – Business name, contact information, description, address and phone Yellow pages – Services and products Green pages – Technical information about […]
Publishing Provider implements business logic Deploys as a web service Generates WSDL Publishes to UDDI Subscribing Subscriber searches UDDI to locate suitable publisher Downloads WSDL from publisher Creates client proxy Invoking Client Application instantiates client proxy Calls functions on the proxy Proxy does SOAP communication with the web service Client processes results returned by proxy
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