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XML-RPC's idea of a human-readable-and-writable, script-parsable standard for HTTP-based requests and responses has also been implemented in competing specifications such as Allaire's [[WDDX|Web Distributed Data Exchange]] (WDDX) and webMethod's [[WIDL (Internet Standard)|Web Interface Definition Language]] (WIDL).<ref>{{Cite news|last=Udell |first=Jon |title=Exploring XML-RPC: DCOM? CORBA? RMI? Why Not Just XML-RPC? |work=Byte |access-date=2015-11-17 |date=1999-06-07 |url=http://www.byte.com/features/1999/06/0607XML_RPC5.html |url-status=dead |archive-url=https://web.archive.org/web/20000304171225/http://www.byte.com/features/1999/06/0607XML_RPC5.html |archive-date=4 March 2000 }}</ref> Prior art wrapping [[Component Object Model|COM]], [[Common Object Request Broker Architecture|CORBA]], and [[Java remote method invocation|Java RMI]] objects in XML syntax and transporting them via HTTP also existed in DataChannel's WebBroker technology.<ref>{{Cite news|volume=20 |issue=21 |last=Walsh |first=Jeff |title=W3C gives a nod to DataChannel's WebBroker |work=Infoworld |access-date=2015-11-17 |date=1998-05-25 |url=http://www.infoworld.com/cgi-bin/displayArchive.pl?/98/21/i06-21.80.htm |url-status=dead |archive-url=https://web.archive.org/web/19990910213004/http://www.infoworld.com/cgi-bin/displayArchive.pl?/98/21/i06-21.80.htm |archive-date=10 September 1999 }}</ref><ref>{{Cite web|last1=Vizard |first1=Michael |last2=Walsh |first2=Jeff |title=DataChannel's Dave Pool talks about shaping the role of XML to suit different needs |work=Infoworld |access-date=2015-12-08 |date=1998-06-29 |url=http://www.infoworld.com/cgi-bin/displayStory.pl?/interviews/980629pool.htm |url-status=dead |archive-url=https://web.archive.org/web/19990916093829/http://www.infoworld.com/cgi-bin/displayStory.pl?/interviews/980629pool.htm |archive-date=16 September 1999 }}</ref>
The generic use of XML for [[remote procedure call]] (RPC) was patented by Phillip Merrick, Stewart Allen, and Joseph Lapp in April 2006, claiming benefit to a provisional application filed in March 1998. The patent was assigned to [[webMethods]], located in [[Fairfax, VA]]. The patent expired on 23 March 2019.<ref name= "merrick01">{{cite web |url=http://www.google.com/patents?id=WFV4AAAAEBAJ |title=US Patent 7,028,312 |access-date=18 September 2008 |author=Merrick|date=11 April 2006|display-authors=etal}}</ref>
==Usage==
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