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Subject: RE: [ubl-ndrsc] Rule: 102 Empty
Although I've contributed next to nothing to UBL, I do seem to recall a discussion around this that is easily understood in the form of an example (totally contrived) that would violate the rule: "The CustomerID element may have the optional attribute customerIDType. If that optional attribute is missing, then the customer ID is a DUNS number." (Yes, I'm aware of W3C XML Schema support for defaults, but that's beside the point and probably not relevant at all given that the rule is not stated in the context of XML Schemas.) Regards, Jim Wilson -----Original Message----- From: Anthony B. Coates [mailto:abcoates@londonmarketsystems.com] Sent: Tuesday, July 15, 2003 2:26 PM To: UBL-NDR Subject: Re: [ubl-ndrsc] Rule: 102 Empty ** Reply to message from "Lisa-Aeon" <lseaburg@aeon-llc.com> on Tue, 15 Jul 2003 10:05:03 -0500 > [R 102] The absence of a construct or data MUST NOT carry meaning. I object to this rule on the basis that it seems unprovable. How does one guarantee that the absence of something cannot never imply something meaningful? I suspect that the idea behind this was something like "absence of an element should not be used to imply that the element has a null value", or something like that. Can someone who was around for the creation of this rule comment on what the idea behind it was? Thanks, Cheers, Tony. ==== Anthony B. Coates London Market Systems Limited 33 Throgmorton Street, London, EC2N 2BR http://www.londonmarketsystems.com/ mailto:abcoates@londonmarketsystems.com Mobile/Cell: +44 (79) 0543 9026 [MDDL Editor (Market Data Definition Language), http://www.mddl.org/] [FpML Arch WG Member (Financial Products Markup Language), http://www.fpml.org/] ----------------------------------------------------------------------- This Email may contain confidential information and/or copyright material and is intended for the use of the addressee only. Any unauthorised use may be unlawful. If you receive this Email by mistake please advise the sender immediately by using the reply facility in your e-mail software. Email is not a secure method of communication and London Market Systems Limited cannot accept responsibility for the accuracy or completeness of this message or any attachment(s). Please examine this email for virus infection, for which London Market Systems Limited accepts no responsibility. If verification of this email is sought then please request a hard copy. Unless otherwise stated any views or opinions presented are solely those of the author and do not represent those of London Market Systems Limited. You may leave a Technical Committee at any time by visiting http://www.oasis-open.org/apps/org/workgroup/ubl-ndrsc/members/leave_wor kgroup.php
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