[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: What is this principle called: "I' send data in my UOM and
Hi Roger, Does this include the option to send lengths in either feet, meters, hands (horses), chains (I think that's one!), light years and so on as you wish? That would worry me! Thanks, Pete Cordell Codalogic Ltd Interface XML to C++ the easy way using C++ XML data binding to convert XSD schemas to C++ classes. Visit http://codalogic.com/lmx/ or http://www.xml2cpp.com for more info ----- Original Message ----- From: "Costello, Roger L." <costello@mitre.org> To: <xml-dev@lists.xml.org> Sent: Friday, September 09, 2011 3:15 PM Subject: What is this principle called: "I' send data in my UOM and you convert it, as needed, to your UOM"? Hi Folks, Suppose that every member in a community is required to exchange data using one unit of measure. For example, suppose length is required to be expressed as a decimal value in centimeters. Consider a system that internally deals with length measurements in meters. Suppose the system wishes to exchange the value "1/3 meter." Recall that the system is required to exchange values in decimal centimeters. However, there is no exact conversion of "1/3 meter" to centimeters. Should the system send the value 33 cm, 33.3 cm, 33.33333 cm? In the general case, the sending system has no insight into the precision required by recipients. Exchanging the wrong amount of precision could be catastrophic. There is a principle that a sender should transmit its original data (e.g., 1/3 meter); it is up to recipients to convert the data, if necessary, to the precision they require. What's the name of the principle? I remember someone on this list talking about it long ago. Perhaps Len? Perhaps Walter Perry? (BTW, anyone know the whereabouts of Walter?) /Roger _______________________________________________________________________ XML-DEV is a publicly archived, unmoderated list hosted by OASIS to support XML implementation and development. To minimize spam in the archives, you must subscribe before posting. [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ Or unsubscribe: xml-dev-unsubscribe@lists.xml.org subscribe: xml-dev-subscribe@lists.xml.org List archive: http://lists.xml.org/archives/xml-dev/ List Guidelines: http://www.oasis-open.org/maillists/guidelines.php
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