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fn:years-from-duration

The number of years in a duration

Description

The fn:years-from-duration function calculates the years component of a normalized xs:duration value. This is not necessarily the same as the integer that appears before the Y in the value. For example, if the duration is P1Y18M, the function returns 2 rather than 1. This is because 18 months is equal to 1.5 years, and the normalized value is therefore P2Y6M.

For a function that returns the total number of years as a decimal number, see functx:total-years-from-duration.

This description is © Copyright 2007, Priscilla Walmsley. It is excerpted from the book XQuery by Priscilla Walmsley, O'Reilly, 2007. For a complete explanation of this function, please refer to Appendix A of the book.

Arguments and Return Type

Examples

years-from-duration(
   xs:yearMonthDuration('P3Y'))

3

years-from-duration(
   xs:yearMonthDuration('P3Y11M'))

3

years-from-duration(
   xs:yearMonthDuration('-P18M'))

-1

years-from-duration(
   xs:yearMonthDuration('P1Y18M'))

2

years-from-duration(
   xs:yearMonthDuration('P12M'))

1

See Also

History