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I meant your 2. statement. examples for datatype date: --------------------------------- dbo:releaseDate > (after) dbo:latestReleaseDate birth date < death date examples for integers: -------------------------- 1 < 2 -1 < 5 examples for strings: ------------------------ Antoine < Kai '-1' > '5' ? But I also think that your 1. statement should also be a requirement. We do not have such a requirement? When I look over the requirements I do not see that one. We should add it. Cheers, Thomas Thomas, I'm not clear what you mean by "based on datatype". Maybe you can give an example. Also, I see two possibilities, and we may not have covered both: 1) make sure that a value is valid for its datatype (e.g. that a date really is a date) 2) compare the values of two different properties to some end (e.g. birth date must be earlier than death date) We were reading this as the latter, which is what "compare" implies to me. If it is #1, instead, we could call it "check that value is valid for datatype" kc On 12/11/14 9:50 AM, Bosch, Thomas wrote: > Hi all, > > I am not convinced to rename R-43 > (http://lelystad.informatik.uni-mannheim.de/rdf-validation/?q=node/50) > to 'Data Value'. > > When I initially created the requirement > R-43-COMPARISONS-BASED-ON-DATATYPE > my intention was that comparisons of strings, digits, dates, ... should > be possible. > > So, not only comparisons of digits or only comparisons of dates, ... > > The comparisons should be done based on the individual datatype. > > This means, that date values should be compared according to the rules > how to compare values / literals of the datatype 'date'. > And these rules differ for the individual datatypes. > > Because of this, I chose the name 'comparison based on datatype'. > > my recommendation is 'comparison of literals based on datatype'. > > Thoughts? > > > Best, > Thomas > > -- > > Thomas Bosch, M.Sc. (TUM) > > PhD Student > > GESIS - Leibniz Institute for the Social Sciences > > Social Science Metadata Standards > > Visitors Address: B2,1, D-68159 Mannheim > > Postal Address: P.O.Box 12 21 55, D-68072 Mannheim > > Tel: + 49 (0) 621 / 1246-271 > > Fax: + 49 (0) 621 / 1246-100 > > Web: http://www.gesis.org > > Website: http://boschthomas.blogspot.com/ > GitHub: _https://github.com/boschthomas/PhD_ > -- Karen Coyle [log in to unmask] http://kcoyle.net m: 1-510-435-8234 skype: kcoylenet/+1-510-984-3600