Most enterprises have made extensive investments in system resources over the course of many years. Such enterprises have an enormous amount of data stored in legacy enterprise information systems (EIS), so it's not practical to discard existing systems. It's more cost-effective to evolve and enhance EIS. But how can this be done? Service Oriented Architecture (SOA) provides a cost-effective solution.
SOA is not a new concept. Sun defined SOA in the late 1990's to describe Jini, which is an environment for dynamic discovery and use of services over a
Web Services can make your applications Web applications.
Web Services are published, found and used through the Web.
What You Should Already Know
Before you continue you should have a basic understanding of the following:
* HTML
* XML
If you want to study these subjects first, find the tutorials on our Home page.
What are Web Services?
* Web services are application components
* Web services communicate using open protocols
* Web services are self-contained and self-describing
* Web services can be discovered using UDDI
* Web
Web Services have three basic platform elements.
These are called SOAP, WSDL and UDDI.
What is SOAP?
The basic Web services platform is XML plus HTTP.
* SOAP stands for Simple Object Access Protocol
* SOAP is a communication protocol
* SOAP is for communication between applications
* SOAP is a format for sending messages
* SOAP is designed to communicate via Internet
* SOAP is platform independent
* SOAP is language independent
* SOAP is based on XML
* SOAP is simple and extensible
* SOAP allows you to get around firewalls
* SOAP
MICROSOFT, VERISIGN, AND webMethods on Wednesday introduced a security specification that works to simplify the integration of PKI (public key infrastructure) and digital certificates with XML applications.
The three companies have released the specification, dubbed XKMS (XML Key Management Specification), and will submit it to the appropriate Web standards bodies for consideration as an open Internet standard, the companies said in a statement.
Without XKMS, applications are required to understand the guts of the PKI architecture, which works
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