Re: [xsl] Adding duration to date

[Abel Braaksma <abel.online@xxxxxxxxx>]

tom tom wrote:
> I wish to add a duration to a date, something along the lines of:
>
> <xsl:value-of select="current-date() + xdt:yearMonthDuration('P6D')"/>.
>
> I am using saxon 8.x, what is the correct way to do this, what should 
> my namespace declarations be to make this work and does the way I do 
> this depend on which version of Saxon / another processor I am using?

You are on the right track. Make sure you spell the yearMonthDuration 
correctly (there are no days in a yearMonthDuration constructor) and do 
not use the xdt namespace anymore 
(http://www.w3.org/2004/10/xpath-datatypes), because it has been 
superseded by the namespace of XMLSchema 
(http://www.w3.org/2001/XMLSchema). Commonly the 'xs' prefix is used, 
like with XML Schema datatypes. The rest is simple: just use normal 
arithmetic and you are done:

<xsl:sequence select="current-date() + xs:yearMonthDuration('P2Y1M')" 
as="xs:date" />

will add two years and one month to today.

Cheers,
-- Abel Braaksma