WebSphere Application Server V7.0: Concepts ... - IBM Redbooks

owser without having to reload entire pages, increasing the interactivity,
usability, and speed of the user experience. Behind the scenes, this means
that Ajax implements a stateful client that interacts asynchronously with the
server.
► Representational State Transfer (REST)
REST is a software architecture for building hypermedia systems. It consists
of a series of principles that outline how resources are defined and
addressed. Any internet application should follow these principles, but some
applications violate them (for instance, having large amounts of server-side
session data). Ajax, on the contrary, follows the key principles of REST.
► JavaScript Object Notation (JSON)
JSON is a human readable data interchange format that is used in Ajax as an
alternative format to XML. Although it is based on a subset of the JavaScript
language, it is language-independent.
► Atom
Atom is composed of two different standards:
– Atom syndication format
Atom syndication format is an XML language used for Web feeds, which
are a mechanism for publishing information and subscribing to it.
– Atom publishing protocol
Atom publishing protocol is an HTTP-based protocol for creating and
updating Web applications.
Atom was developed as an alternative to RSS feeds in order to overcome
RSS incompatibilities.
13.2.2 Overview of the Web 2.0 feature pack
This feature pack extends Service Oriented Architecture (SOA) by connecting
external Web services, internal SOA services, and Java Platform, Enterprise
Edition (Java EE) objects into highly-interactive Web application interfaces. It
provides a supported, best-in-class Ajax development toolkit for WebSphere
Application Server. It also provides a rich set of extensions to Ajax.
Chapter 13. WebSphere Application Server Feature Packs 409