eXternal Data Representation


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eXternal Data Representation

(XDR) A standard for machine independent data structures developed by Sun Microsystems for use in remote procedure call systems. It is defined in RFC 1014 and is similar to ASN.1.
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XDR

(1) (EXternal Data Representation) A data format developed by Sun that is part of its networking standards. It deals with integer size, byte ordering, data representation, etc. and is used as an interchange format. Different systems convert data to XDR for sending and from XDR upon receipt.

(2) (XML-Data Reduced) An XML schema language from Microsoft prior to the W3C XML schema. XDR was released in 1999 as a working schema as part of Microsoft's BizTalk initiative. XDR supports data typing and XML namespaces. See XML schema and XML.

(3) (EXtreme Data Rate) A dynamic RAM chip technology from Rambus, Inc., Los Altos, CA (www.rambus.com) that is the successor to Rambus' RDRAM memory. Used in Sony's PlayStations 2 and 3 and various consumer electronics devices, the second generation XDR2 provides nearly 30 Gbytes/sec of bandwidth to a single device.
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