Web Service
Using MyEclipse to create WebService
WSDL defines following elements:
Data Type Definition - data such as complex type, operation request type, response type, common xsd etc. are defined under <Types> tag.
Message Definition - name of the message, input and output, if using soap , soap fault
Port Type - interface definitions, including operations, each operation input and output message, fault message.
Binding - describes how interfaces are converted into concrete data formats and protocols
Service - a collection of bindings
A detailed guideline for implementing JAX-WS using Apache http://axis.apache.org/axis2/java/core/docs/jaxws-guide.html#JAXWSIntro
RESTful Web Service Tutorial