Web Services Standards; Java Ee Web Service Standards - Sun Microsystems GlassFish Enterprise Server 2.1 Administration Manual

Overview of Web Services
simple, flexible, text-based markup language. XML data is marked using tags enclosed in angled
brackets. The tags contain the meaning of the data they mark. Such markup allows different
systems to easily exchange data with each other.
A Document Type Definition (DTD) or XML Schema Definition (XSD) describes the structure
of an XML document. It has information on the tags the corresponding XML document can
have, the order of those tags, and so forth.
XSLT, which stands for eXtensible Stylesheet Language Transformation, is used for
transforming XML documents from one format to another.

Web Services Standards

Simple Object Access Protocol (SOAP) provides a common messaging format for web services.
SOAP enables objects not known to one another to exchange messages. SOAP uses an
XML-based data encoding format and HTTP to transport messages. SOAP is independent of
both the programming language and the operational platform, and it does not require any
specific technology at its endpoints
Universal Description, Discovery, and Integration (UDDI) provides a standard way to register,
de-register, and look up web services. Similar to a telephone system's yellow pages, a UDDI
registry's enables providers to register their services and requestors to find services. Once a
requestor finds a service, the registry has no more role to play between the requestor and the
provider.
Web Services Description Language (WSDL) defines a standard way to specify the details of a
web service. It is a general-purpose XML schema that can specifies details of web service
interfaces, bindings, and other deployment details. By having such a standard way to specify
details of a service, clients who have no prior knowledge of a web service can use it.
ebXML (Electronic Business using eXtensible Markup Language) is a set of specifications that
enables enterprises to conduct business over the Internet.
Advancement of Structured Information Standards) controls the ebXML specifications.

Java EE Web Service Standards

Java APIs for XML processing (JAXP) is a vendor-neutral set of lightweight APIs for parsing or
processing XML documents. JAXP enables a web service to "plug in" any conforming XML
parser. If no external parser is "plugged in, " then JAXP uses its own XML parser
implementation.
Java API for XML-based remote procedure calls (JAX-RPC) uses an XML-based protocol for
client-server remote procedure calls . JAX-RPC enables SOAP-based interoperable and portable
web services. Developers use the JAX-RPC programming model to develop SOAP-based web
154 Sun GlassFish Enterprise Server 2.1 Administration Guide • December 2008
OASIS (Organization for the