XML Shema
In addition to XML Shema, the XML definition language has Schematron, RELAX, TREX, etc. Relax is the XML definition standard proposed by Japan. RELAX, TREX standard merges to become the current RELAX NG standard. These XML definitions have their own side priorities and functions. These design languages can be used in conjunction with XML definitions of health, flexible and strong constraints.
Using some important syntax (such as the Any Tag "characteristics of XML SHEMA, the inheritance, polymorphism, reuse of XML SHEMA can be realized.
Web service
WSDL SOAP is the most popular way in the implementation of Web Service. The working principle is the same as the XML-RPC, which is based on the structure of RPC-Centric. It is characterized by that the customer request needs to pass the HTTP POST mode, a single target address of the server, the service program unwroved to the SOAP Protocol Envelope Envelope, can be processed, determine the next behavior. The entire process is opaque. The URI-CENTRIC structure corresponds to the structure of the RPC-Centric. The client can request a service, requested a list of URI options through the HTTP GET method, and the client can clearly determine the next behavior. For URI-Centric, see REST - REPRESENTATIVE State Transfer.
