Re: using EXSLT {RE: date calculation from Excel 1900

Hi,

	Thanks for help from Jeni and Mike, I eventually get
the date:add and date:duration to work.  Following are
the behavior I am seeing with EXSLT/Saxon 6.3.  The
extension namespaces I used are:
<xsl:stylesheet version="1.0"
	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
	xmlns:date="http://exslt.org/dates-and-times"
	xmlns:func="http://exslt.org/functions"
	extension-element-prefixes="date">

A. when import function-level packages:
<xsl:import href="date.add.xsl" />
<xsl:import href="date.duration.xsl" />
Run Saxon and got the error:	
Error at func:script on line 5 of
file:/C:/test/date.add.xsl:
  Unknown Saxon extension element
Transformation failed	
The line it complains about is:
<func:script language="exslt:javascript"
implements-prefix="date" src="date.js"/>
>From Saxon's webpage, Saxon 6.3 supports only
func:function and func:result, therefore func:script
is not recognized.

B. when import just the functions:
<xsl:import href="date.add.function.xsl"/>
<xsl:import href="date.duration.function.xsl" />
Try to use function <func:function name="date:add">,
run Saxon and got the error:
Error at xsl:value-of on line 24 of
file:/C:/test/test1.xsl:
  javax.xml.transform.TransformerException: Cannot
write to result tree while executing a function:
Cannot write to result tree while executing a function
Transformation failed
The line it complains about is:
<xsl:value-of select="date:add('1900-01-01T00:00:00',
date:duration(37257.041667 * 60 *60 *24))"/>

C. when import just the templates:
<xsl:import href="date.add.template.xsl"/>
<xsl:import href="date.duration.template.xsl" />
Uses xsl:call-template and run Saxon, it works and
outputs "2002-01-03T01:00:00".

The good news is I found a way that works.  The
questions I have though is, how to get approach B to
work?

Any insights would be very much appreciated.

Thanks,
Xiaocun

> >Date: Tue, 12 Jun 2001 08:40:45 -0700 (PDT)
> >From: Xiaocun Xu <xiaocunxu@xxxxxxxxx>
> >Subject: Help needed with using EXSLT {RE: 
> date calculation from Excel 1900 Format}
> >To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> >MIME-Version: 1.0
> >Content-Type: text/plain; charset=us-ascii
> >
> >Hi,
> >
> >  This is my first try with EXSLT.  Following
> Jeni's
> >advice, I am trying to use the dates-and-times
> >functions to convert Excel 1900 date format using
> >Saxon 6.3.
> >  I downloaded date.zip and unzipped it in c:\test
> >directory.  When I tried to run Saxon, I get the
> >following error:
> >Error at xsl:value-of on line 11 of
> >file:/C:/test/test1.xsl:
> >  The URI http://exslt.org/dates-and-times does not
> >identify an external Java class
> >Transformation failed
> >
> >test1.xsl looks like:
> ><xsl:stylesheet version="1.0"              
> >xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> >xmlns:date="http://exslt.org/dates-and-times"
> >extension-element-prefixes="date">               
> ><xsl:import
> >href="date/functions/add/date.add.function.xsl"/>
> ><xsl:template match="/">
> ><xsl:value-of
> select="date:add('1900-01-01T00:00:00',
> >date:duration(37257.041667 * 60 *60 *24))"/>
> ></xsl:template>
> ></xsl:stylesheet>
> >
> >If I just use <xsl:import href="date/date.xsl" />,
> the
> >error I get would be:
> >Error at func:script on line 3 of
>
>file:/C:/test/date/functions/date-time/date.date-time.xsl:
> >  Unknown Saxon extension element
> >Transformation failed
> >
> >How should I properly access date:add() and
> >date:duration() functions using Saxon?
> >
> >Much thanks,
> >Xiaocun
> >
> >--- Michael Kay <mhkay@xxxxxxxxxxxx> wrote:
> >> Saxon 6.3 doesn't have direct support for the
> exslt
> >> date module, but I
> >> believe some of the functions have been
> implemented
> >> using exslt:function,
> >> which Saxon does support; it just means you have
> to
> >> import these function
> >> definitions.
> >>
> >> Mike Kay
> >>
> >> >
> >> > --- Jeni Tennison <mail@xxxxxxxxxxxxxxxx>
> wrote:
> >> > > Hi Xiaocun,
> >> > >
> >> > > > During my conversion from Excel to XML, I
> >> needed
> >> > > to convert dates.
> >> > > > Excel stores date in so called "1900
> format",
> >> > > which is the number of
> >> > > > days since 1/1/1900 in decimal format, e.g.
> >> > > 37257.041667 for
> >> > > > 1/1/2002 1AM. I need to convert this back
> to
> >> > > YYYY-MM-DD HH:MM:SS
> >> > > > format when I convert the Excel into XML.
> >> > > >
> >> > > > Has anyone did date conversion calculation,
> >> esp.
> >> > > Excel 1900 format,
> >> > > > with XSL?
> >> > >
> >> > > The EXSLT - Dates and Times module
> >> > > (http://www.exslt.org/date - look
> >> > > at the implementer pages for the full set of
> >> > > functions) defines
> >> > > several functions that help with this kind of
> >> thing.
> >> > > Most of them
> >> > > (including the ones you need) are implemented
> as
> >> > > pure XSLT 1.0
> >> > > templates and as functions through EXSLT -
> >> Functions
> >> > > (which is
> >> > > supported in Saxon 6.3 and 4XSLT); all are
> >> > > implemented in Javascript,
> >> > > thanks to Chris Bayes.
> >> > >
> >> > > There's no specific conversion function for
> >> Excel
> >> > > 1900 format but you
> >> > > can get the dates that you're after by
> >> converting
> >> > > the number
> >> > > to a number of seconds, thence to a duration,
> >> and
> >> > > then add that
> >> > > duration to 1900-01-01.  With functions:
> >> > >
> >> > >   date:add('1900-01-01T00:00:00',
> >> > >            date:duration(37257.041667 * 60 *
> 60
> >> *
> >> > > 24))
> >> > >
> >> > > Or with templates:
> >> > >
> >> > > <xsl:call-template name="date:add">
> >> > >    <xsl:with-param name="date-time"
> >> > > select="'1900-01-01T00:00:00'" />
> >> > >    <xsl:with-param name="duration">
> >> > >       <xsl:call-template
> name="date:duration">
> >> > >          <xsl:with-param name="seconds"
> >> > >                          select="37257.041667
> *
> >> 60 *
> >> > > 60 * 24" />
> >> > >       </xsl:call-template>
> >> > >    </xsl:with-param>
> >> > > </xsl:call-template>
> >> > >
> >> > > [Trying it out, you should actually use the
> >> "1900
> >> > > format" date *minus
> >> > > 2* in your calculation, because the day count
> >> starts
> > > > > from 1 rather
> >> > > than 0, and because Excel thinks that 1900
> was a
> >> > > leap year (which it
> >> > > wasn't, I think, because it's divisible by
> >> 100).]
> >> > >
> >> > > This results in an ISO 8601 date:
> >> > > '2002-01-01T01:00:00'.  You're
> >> > > probably best converting the 'T' to a space
> >> using
> >> > > the translate()
> >> > > function:
> >> > >
> >> > >   translate($date-time, 'T', ' ')
> >> > >
> >> > > to get the format that you're after.
> >> > >
> >> > > I hope that helps,
> >> > >
> >> > > Jeni
> >> > >
> >> > > ---
> >> > > Jeni Tennison
> >> > > http://www.jenitennison.com/


__________________________________________________
Do You Yahoo!?
Get personalized email addresses from Yahoo! Mail - only $35 
a year!  http://personal.mail.yahoo.com/

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list