Re: Conditional statements in DTD?
> >> (Without extension functions, though, I don't >> think Schematron can require that if @x is "yes", then @y >> must be a prime number.) > > if(@x='yes') then > not(some $i in 2 to (xs:integer(@y)-1) satisfies (@y mod $i) = 0) Even in XML 1.0 (@x mod 2) = 0 or (@x mod 3) = 0 or (@x mod 5) = 0 or (@x mod 7) = 0 or (@x mod 11) = 0 or (@x mod 13) = 0 or (@x mod 17) = 0 or (@x mod 19) = 0 on the understanding that the assertion *test* may be lossy compared to the assertion *text* (no false negatives). In Schematron the assertion text has the primacy: you can even make assertions for which no effective test exists, such as "This element is a date, in any notation and calendar, but ISO 8601 is preferred." Cheers Rick
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