2.1.6 [W3C-XSD] Section 3.2.6.3, Facet Comparison for durations

V0006:

The specification states:

 In comparing duration values with minInclusive, minExclusive, maxInclusive 
 and maxExclusive facet values indeterminate comparisons should be considered 
 as "false".

MSXML6

Some comparisons that are indeterminate are considered to be true, such as P30D and P1M.

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