[DFDL-WG] Action 167: textNumberPatterns with P, V, # - allowable combinations

[Steve Hanson]

Last week we agreed that disallowing text number patterns that contained a 
# symbol and either a P or V symbol was too restrictive. Accordingly the 
following rules are proposed to control when # may be used in the same 
pattern as P or V to ensure an unambiguous pattern.

a) Pattern must not have # symbols to the right of the V symbol.

b) If pattern has P symbols at the left end, then there must be as many 0 
symbols adjacent to the rightmost P symbol as there are P symbols.

c) If pattern has P symbols at the right end, there are no restrictions.

If a) or b) are violated it is a schema definition error.
 
Regards

Steve Hanson
Architect, Data Format Description Language (DFDL)
Co-Chair, OGF DFDL Working Group
IBM SWG, Hursley, UK
smh at uk.ibm.com
tel:+44-1962-815848





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