I agree with you Thomas but there's always some implicit semantics, I mean: when there is no data, it is taken as false, but what happen if the person who do the questionnaire do not try to make this question false? May be he/her didn't want to answer, and this false could have value/semantics in clinical or legal fields.
Just thinking out loud. -- Kind regards, A/C Pablo Pazos Guti?rrez LinkedIn: http://uy.linkedin.com/in/pablopazosgutierrez Blog: http://informatica-medica.blogspot.com/ Twitter: http://twitter.com/ppazos Date: Wed, 9 Feb 2011 09:54:18 +0000 From: [email protected] To: openehr-technical at openehr.org Subject: Re: Representing binary values with DV_BOOLEAN certain kinds of questionnaires are constructed with (some) purely boolean questions as well. - thomas On 09/02/2011 09:26, Derek Meyer wrote: There may be some genuine boolean data. For example, either consent has been given for a procedure or it has not. NULL in this case = false. _______________________________________________ openEHR-technical mailing list openEHR-technical at openehr.org http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openehr.org/mailman/private/openehr-technical_lists.openehr.org/attachments/20110209/4f352b6a/attachment.html>
