Is "P0Y0M0DT0H0M0.0S" a valid value for a WSRM expires element?

Is "P0Y0M0DT0H0M0.0S" a valid value for a WSRM expires element?

Apache CXF appears to use this value as a default.

However, the latest 1.2 WS-RM Oasis spec indicates...

This el开发者_Python百科ement, if present, of type xs:duration specifies the duration for the offered Sequence. A value of "PT0S" indicates that the offered Sequence will never expire. Absence of the element indicates an implied value of "PT0S".

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Are far as XML Schema is concerned, the two strings "P0Y0M0DT0H0M0.0S" and "PT0S" are both lexical representations of the same duration value (0).