The Apache Software Foundation is a non-profit corporation to support Apache software projects, including the Apache HTTP Server. The ASF was formed from the Apache Group and incorporated in Delaware, U.S., in June 1999.The Apache Software Foundation is a decentralized community of developers...
Extensible Markup Language is a set of rules for encoding documents in machine-readable form. It is defined in the XML 1.0 Specification produced by the W3C, and several other related specifications, all gratis open standards....
-based declarative framework for building interactive Ajax
Ajax (programming)
Ajax is a group of interrelated web development methods used on the client-side to create asynchronous web applications...
A web application is an application that is accessed over a network such as the Internet or an intranet. The term may also mean a computer software application that is coded in a browser-supported language and reliant on a common web browser to render the application executable.Web applications are...
s. Developers hope to create a product that will interface with various Ajax software toolkits, reduce the need of program scripting and solve the development challenge as well as application maintenance challenges associated with Ajax programming.
A programming language is an artificial language designed to communicate instructions to a machine, particularly a computer. Programming languages can be used to create programs that control the behavior of a machine and/or to express algorithms precisely....
, which differs from available declarative user interface languages in that it also includes declarations pointing to local or http-requestable data sources. XAL also makes provision for algorithmic alteration or replacement of the initially-declared interface — for example, a button or link can easily be made to add a new piece of page layout to the page, defined using either XAL or HTML
HTML
HyperText Markup Language is the predominant markup language for web pages. HTML elements are the basic building-blocks of webpages....
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Example
Here an example of login screen:
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