OpenLaszlo is an open source platform for the development and delivery of web application with a nice human interface (sometimes called rich internet applications) on the World Wide Web. It is released under the Open Source Initiative-certified Common Public License. Open source refers to projects that are open to the public and which draw on other projects that are freely available to the general public. ... It has been suggested that List of Rich Internet Applications be merged into this article or section. ... Graphic representation of the World Wide Web around Wikipedia The World Wide Web (WWW or simply the Web) is an information space in which the items of interest, referred to as resources, are identified by global identifiers called Uniform Resource Identifiers (URIs). ... The Open Source Initiative is an organization dedicated to promoting open source software. ... The CPL (Common Public License) is an open source license from IBM. Its license terms have been approved by the Open Source Initiative. ...

The OpenLaszlo platform consists of the LZX programming language and the OpenLaszlo Server.

• LZX is an XML and JavaScript description language similar in spirit to XUL and XAML. LZX enables a declarative, text-based development process that supports rapid prototyping and software development best practices. It is designed to be familiar to traditional web application developers who are familiar with HTML and Javascript.

• The OpenLaszlo server is a Java servlet that compiles LZX applications into executable binaries for targeted run-time environments. OpenLaszlo currently targets the Flash Player.

The Extensible Markup Language (XML) is a W3C-recommended general-purpose markup language for creating special-purpose markup languages, capable of describing many different kinds of data. ... JavaScript is an object-based scripting programming language based on the concept of prototypes. ... XUL (XML User Interface Language) is a user interface markup language developed to support Mozilla applications like Mozilla Firefox and Mozilla Thunderbird. ... XAML (short for Extensible Application Markup Language, and pronounced Zammel) is the user interface markup language for the Windows Presentation Foundation, which is one of the pillars of the WinFX API. XAML is a declarative XML-based language optimized for describing graphically rich visual user interfaces, such as those created... A 3D printer for rapid prototyping Rapid prototyping also describes a software engineering methodology. ... Software engineering (SE) is the profession concerned with specifying, designing, developing and maintaining software applications by applying technologies and practices from computer science, project management, and other fields. ... In computing, HyperText Markup Language (HTML) is a markup language designed for the creation of web pages and other information viewable in a browser. ... Java is an object-oriented programming language developed by James Gosling and colleagues at Sun Microsystems in the early 1990s. ... The Java Servlet API allows a software developer to add dynamic content to a web server using the Java platform. ... Macromedia Flash or Flash is a graphics animation program, written and marketed by Macromedia, that uses vector graphics. ...

Deployment

Laszlo applications can be deployed as traditional Java servlets, which are compiled and returned to the browser dynamically. This method requires that the web server be running the OpenLaszlo server.

Alternatively, Laszlo applications can be compiled from LZX into a binary SWF file, and loaded statically into an existing web page. This method is known as SOLO deployment. Applications deployed in the manner lack some functionality of servlet-contained files, such as the ability to consume SOAP web services and XML remote procedure calls. Look up binary in Wiktionary, the free dictionary. ... SWF (pronounced “swiff” by some, standing for Shockwave Flash) is the file format used by Macromedia Flash. ... SOAP is a protocol for exchanging XML-based messages over a computer network, normally using HTTP. SOAP forms the foundation layer of the web services stack, providing a basic messaging framework that more abstract layers can build on. ...

Licensing

OpenLaszlo was originally developed and released under the Common Public License by Laszlo Systems. Laszlo is an open source platform for the development and delivery of rich internet applications on the World Wide Web. ...

Adopters

Laszlo-powered Rich Internet Applications (RIAs) have been deployed by Earthlink [1], Yahoo!, Behr [2], Pandora, La Quinta Hotels, the Internet Archive and DeanForAmerica.com [3]. EarthLink (NASDAQ: ELNK), headquartered in Atlanta, Georgia, is one of the major Internet service providers in the United States, with 5. ... For other uses, see Yahoo. ... Internet Archive headquarters. ...

Laszlo Systems, makers of OpenLaszlo, are developing their own software based on the Laszlo Presentation Server. The most recent is a mail client which offers the responsiveness and feel of a traditional email client such as Microsoft Outlook or Mozilla Thunderbird, but which operates within the web browser. Screenshot of Outlook 2003 Microsoft Outlook is a personal information manager from Microsoft, and is part of the Microsoft Office suite. ... Mozilla Thunderbird is a free, cross-platform email and news client developed by the Mozilla Foundation. ...

Project History

OpenLaszlo was originally called the Laszlo Presentation Server (LPS). Development of the LPS began in the fall of 2001. Preview versions were released to select partners over the course of 2002; several of these were used to deploy the Behr paint application. The first general release of LPS was in early 2002.

In October 2004, Laszlo Systems released the entire sources to the Laszlo Presentation Server under the CPL open source license, and initiated the OpenLaszlo project. In 2005, coincident with the release of version 3.0, the name of the Laszlo Presentation Server was changed to OpenLaszlo.

Timeline:

• 2000 Prototyping begins
• 2001 Development begins
• 2002 LPS preview releases; first deployed Laszlo application (Behr)
• 2003 LPS 1.0, 1.1 released; deployed applications (Yahoo, Earthlink)
• 2004 LPS 2.0, 2.1, 2.2 released; LPS open sourced
• 2005 OpenLaszlo 3.0, 3.1 released; name changed to OpenLaszlo

See also

• List of user interface markup languages
• Comparison of user interface markup languages

The following is a list of user interface markup languages. ... The following tables compare general and technical information for a number of user interface markup languages. ...

External links

• OpenLaszlo
• Laszlo Systems
• LaszloMail

Laszlo is also the name of Erno Laszlo and Erno Laszlo Institute. Erno Laszlo, Ernő László was a Hungarian dermatologist and cosmetic businessman, founder of The Erno Laszlo Institute. ...