WDDX

WDDX (Web Distributed Data eXchange) is a programming language-, platform- and transport-neutral data interchange mechanism designed to pass data between different environments and different computers.

History

WDDX was created by Simeon Simeonov of Allaire Corporation in 1998,[1] initially for the ColdFusion server environment. WDDX was open-sourced later that year.[2]

WDDX and XML-RPC, both created in 1998, were the precursors to SOAP and Web services. SOAP borrows the envelope/header/body structure and the transport + interaction neutrality from WDDX and the HTTP and RPC bindings from XML-RPC.[]

Usage

WDDX is functionally comparable to XML-RPC and WIDL.[3] The specification supports simple data types such as number, string, boolean, etc., and complex aggregates of these in forms such as structures, arrays and recordsets (row/column data, typically coming from database queries). There are WDDX interfaces for a wide variety of languages, including ColdFusion, Ruby, Python, PHP, Java, C++, .NET, Actionscript, lisp, Haskell, Perl.

The data is encoded into XML using an XML 1.0 DTD, producing a platform-independent but relatively bulky representation. The XML-encoded data can then be sent to another computer using HTTP, FTP, or other transmission mechanism. The receiving computer must have WDDX-aware software to translate the encoded data into the receiver's native data representation. WDDX can also be used to serialize data structures to storage (file system or database). Many applications use WDDX to pass complex data to browsers where it can be manipulated with JavaScript, as an alternative to JSON.

Example: (from php.net/wddx)

<wddxPacket version='1.0'>
  <header comment='PHP'/>
  <data>
    <struct>
      <var name='pi'>
        <number>3.1415926</number>
      </var>
      <var name='cities'>
        <array length='3'>
          <string>Austin</string>
          <string>Novato</string>
          <string>Seattle</string>
        </array>
      </var>
    </struct>
  </data>
</wddxPacket>

Notes

  1. ^ Simeonov, Simeon. "WDDX: Distributed Data for the Web". Retrieved . 
  2. ^ Itoi, Nikki Goth (February 1999). "Syndicating the Web: Businesses are hoping that the ICE protocol will reduce the Web's content-sharing hassles". Red Herring. Archived from the original on October 13, 1999. 
  3. ^ Udell, Jon (1999-06-07). "Exploring XML-RPC: DCOM? CORBA? RMI? Why Not Just XML-RPC?". Byte. Archived from the original on March 4, 2000. Retrieved . 

External links


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.


WDDX
 



 

Connect with defaultLogic
What We've Done
Led Digital Marketing Efforts of Top 500 e-Retailers.
Worked with Top Brands at Leading Agencies.
Successfully Managed Over $50 million in Digital Ad Spend.
Developed Strategies and Processes that Enabled Brands to Grow During an Economic Downturn.
Taught Advanced Internet Marketing Strategies at the graduate level.


Manage research, learning and skills at defaultLogic. Create an account using LinkedIn or facebook to manage and organize your IT knowledge. defaultLogic works like a shopping cart for information -- helping you to save, discuss and share.


  Contact Us