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Subject: [ubl-ndrsc] Re: Absence of Data

One thing I am interested in some opinions on is whether we should make UBL
behave as EDI does, i.e., for alphanumeric elements there must be at least
one non-space character in the element.  This may remove a few
implementation complexities, but will add a bit to the schema design.  We
would have to create a type from string which imposed a pattern (via a
regular expression) of at least one non-space character.  Certainly doable.
I am curious, though, about processing overhead.  I know that parsers must
do pattern validation on numerics and dates, but I wonder if imposing it on
all strings would slow down processing appreciably.  Any thoughts?

Michael C. Rawlins, Rawlins EC Consulting

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