[December 08, 1998] "Allaire Announces the Web Distributed Data Exchange (WDDX). XML-based Technology Offered in Newly Released Software Development Kit; WDDX.org Web Site Launched to Support Open-Source Technology Development." - "WDDX gives companies the power to create 'Web Syndicate Networks,' where the content and commerce assets of any Web site can be exposed as services to other Web sites. This technology will enable new types of business on the Web, and increase interoperability between varying Web application platforms."
Perl and WDDX - WDDX Description from Codebits