dog-and-duck.quack.picky.time
Time, gentleman, please! Recognising and validating date time values.
date-time-property-or-fault
(date-time-property-or-fault x property severity token required?)If the value of this property of object x is a valid xsd:dateTime value, return a fault object with this token and severity. 
If required? is false and there is no such property, no fault will be returned.
xsd-date-time?
(xsd-date-time? value)Return true if value matches the pattern for an xsd:dateTime, else false
xsd-duration?
(xsd-duration? value)Return true if value matches the pattern for an xsd:duration, else false