add-duration EXSLT date add-duration 2 Jeni Tennison 2001-06-11

Made it illegal to have an addition result in positive (years and) months and negative (days, hours, minutes and) seconds, or vice versa.
Added implementations in Javascript, XSLT and EXSLT - Functions.

2.1 Jeni Tennison 2001-06-16

Updated Javascript implementation.
Added Microsoft-specific stylesheet.

2.2 Craig Stewart 2002-08-21 Added libxslt implementation to the list.

The date:add-duration function returns the duration resulting from adding two durations together.

Both arguments are strings in the format defined for xs:duration in [3.2.6 duration] of [XML Schema Part 2: Datatypes]. If either argument is not in this format, the function returns an empty string ('').

The return value is a string in the format defined for xs:duration in [3.2.6 duration] of [XML Schema Part 2: Datatypes].

The durations can usually be added by summing the numbers given for each of the components in the durations. However, if the durations are differently signed, then this sometimes results in durations that are impossible to express in this syntax (e.g. 'P1M' + '-P1D'). In these cases, the function returns an empty string ('').

EXSLT date add-duration Javascript 1 Chris Bayes chris@bayes.co.uk http://www.bayes.co.uk 2001-06-11 2 Chris Bayes chris@bayes.co.uk http://www.bayes.co.uk 2001-06-16 EXSLT date add-duration MSXML 1 Chris Bayes chris@bayes.co.uk http://www.bayes.co.uk 2001-06-16