Editing OpenLaszlo

{{Short description|Discontinued open-source platform}}
{{Infobox software 
| name                   = OpenLaszlo
| logo                   =       
| screenshot             = GeaBiosOpenLaszloSatelliteMappingApplication2.PNG
| caption                = OpenLaszlo 3.2 application and [[DHTML]] ([[GeaBios]])
| developer              = Laszlo Systems
| discontinued           = yes
| latest release version = 4.9.0
| latest release date    = {{start date and age|2010|10|21}}
| operating system       = [[Windows XP]], [[Windows 7]], [[Mac OS X Jaguar]] or later, [[Linux]]
| genre                  = [[Web application framework]]
| license                = [[Common Public License]]
| website                = {{URL|www.openlaszlo.org}}
}}
'''OpenLaszlo''' is a discontinued [[open-source software|open-source]] platform for the development and delivery of [[rich web application]]s. It is released under the [[Open Source Initiative]] certified [[Common Public License]] (CPL).

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

LZX is an [[Extensible Markup Language]] (XML) and [[JavaScript]] [[Interface description language|description language]] similar in spirit to [[XUL]], [[MXML]], and [[Extensible Application Markup Language]] (XAML). LZX enables a declarative, text-based development process that supports [[Rapid application development|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.

OpenLaszlo Server is a [[Java (programming language)|Java]] [[servlet]] that compiles LZX applications into executable binaries for targeted run-time environments.

== 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 is also running the OpenLaszlo server.

Alternatively, Laszlo applications can be compiled from LZX into [[Dynamic HTML]] (DHTML) or a [[binary file|binary]] [[SWF]] file, and loaded statically into an existing web page. This method is known as SOLO deployment. Applications deployed in this manner lack some functionality of servlet-contained files, such as the ability to consume [[SOAP]] web services and Java RPC remote procedure calls.

== Licensing ==
OpenLaszlo is released under the [[Common Public License]] by Laszlo Systems.

== Adopters ==
Laszlo-powered rich web applications have been deployed by [[Earthlink]],<ref name="informationweek">{{cite magazine|url=http://www.informationweek.com/news/software/enterpriseapps/showArticle.jhtml?articleID=60405148|title=EarthLink Takes On AOL, Gmail With Flash-Based Web Mail|last=Keizer|first=Gregg|date=2005-03-03|magazine=InformationWeek|access-date=2009-06-09}}</ref> [[Verizon]], [[Walmart]], [[IBM WebSphere]], [[Yahoo!]], [[Behr (paint)|Behr]], [[Pandora (music service)|Pandora]], La Quinta Hotels, DeanForAmerica.com and Time.gov.

[[Laszlo Systems]], makers of OpenLaszlo, is developing their own software based on the Laszlo Presentation Server. One is a mail client ([[Laszlo Mail]]) which is similar to [[Microsoft Outlook]] or [[Mozilla Thunderbird]], but which operates within the web browser. Another, called Webtop, is an integrated application environment for enterprise use.

== Version history ==
* OpenLaszlo 3.x – supports [[Flash Player]], versions 6, 7, 8
* OpenLaszlo 4.x – supports Flash Player, versions 7, 8, 9, 10, and [[DHTML]]

==Project history==
Laszlo was founded by David Temkin.<ref>{{cite web
|url = http://itc.conversationsnetwork.org/shows/detail703.html
|title = Interview with David Temkin
|date = 2005-08-04
|work = Opening Move, a podcast series from ITConversations
}}</ref>

OpenLaszlo was originally called the Laszlo Presentation Server (LPS). Development began in the fall of 2001.  Preview versions were released to select partners throughout 2002. Several of these were used for the first deployed Laszlo application, for Behr paint.<ref>[http://behr.com Behr paint]</ref>  The first general release of LPS was in early 2002.

In October 2004, Laszlo Systems released the full [[source code]] to the Laszlo Presentation Server under the [[GNU General Public License]] (GPL), 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
* 2006: OpenLaszlo 3.2, 3.3 released
* 2007: OpenLaszlo 4.0 released
* 2008: OpenLaszlo 4.1 released
* 2008: OpenLaszlo 4.2 released
* 2009 February: OpenLaszlo 4.2.0.1 released
* 2010 October: OpenLaszlo 4.9.0. released
* 2012 February: OpenLaszlo is acquired by [[Critical Path, Inc.]]<ref>{{cite web
|url = https://thenextweb.com/insider/2012/02/23/critical-path-buys-laszlo-systems-and-its-rich-internet-applications-platform-webtop/
|title = Critical Path buys Laszlo Systems (and its rich web applications platform Webtop)
|date = 2012-02-23
|work = TNW News
}}</ref>
* 2013 December: Critical Path, Inc. is acquired by [[Openwave Messaging]]<ref>{{cite web
|url = http://owmessaging.com/press_releases/openwave-messaging-acquires-critical-path
|title = Openwave Messaging Acquires Critical Path
|date = 2013-12-04
|work = Openwave Messaging Press Releases
}}</ref>

== Naming ==
The name Laszlo is of [[Hungary|Hungarian]] origin. The project was named after the cat of Peter Andrea, a graphic designer and co-founder of Laszlo Systems. The cat, in turn, was named in honor of the Hungarian [[constructivism (art)|constructivist]] painter and photographer [[László Moholy-Nagy]].<ref>{{cite web
 |url         = http://weblog.openlaszlo.org/archives/2007/03/openlaszlo-community-members-around-the-world-hungary/
 |title       = OpenLaszlo community members around the world - Hungary
 |date        = 2007-03-03
 |work        = OpenLaszlo Project Blog
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20071014024120/http://weblog.openlaszlo.org/archives/2007/03/openlaszlo-community-members-around-the-world-hungary/
 |archive-date = 2007-10-14
}}</ref>

==See also==
{{Portal|Free and open-source software}}
* [[List of user interface markup languages]]
* [[Comparison of user interface markup languages]]
* [[List of rich web application frameworks]]

== References ==
{{reflist}}

==Further reading==
{{refbegin}}
*{{Cite book
| first1    = Chris
| last1     = Coremans
| date      = August 20, 2006
| title     = AJAX and Flash Development with OpenLaszlo: A Tutorial
| edition   = 1st
| publisher = BrainySoftware
| pages     = 350
| isbn      = 978-0-9752128-6-8
| url       = http://books.brainysoftware.com/index.jsp?show=laszlo
}}
*{{Cite book |first1     = Norman
 |last1      = Klein
 |first2     = Max
 |last2      = Carlson
 |first3     = Glenn
 |last3      = MacEwen
 |date       = February 1, 2008
 |title      = Laszlo in Action
 |edition    = 1st
 |publisher  = [[Manning Publications]]
 |pages      = [https://archive.org/details/laszloinaction0000klei/page/550 550]
 |isbn       = 978-1-932394-83-2
 |url        = https://archive.org/details/laszloinaction0000klei/page/550
 |url-access = registration
}}
{{refend}}

==External links==
*{{webarchive |url=https://web.archive.org/web/20090316050931/http://www.openlaszlo.net/ |date=March 16, 2009 |title=OpenLaszlo, tutorials and various documentation }}. {{in lang|en|es}}

{{Rich web applications}}
{{Application frameworks}}
{{Adobe Flash}}

[[Category:Ajax (programming)]]
[[Category:User interface markup languages]]
[[Category:Rich web application frameworks]]
[[Category:Software using the Common Public License]]