In laymans terms is there anyway for me to tell if a date is
either equal
or in the future in a few # of lines?
Assuming XPath 2.0:
if ($date ge current-date()) then ... else ...
Michael Kay
http://www.saxonica.com/
Or does someone have a function that will do this ?
Regards,
Tom Maciejewski
"Haarman,
Michael" To:
"'xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com'"
<xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com>
<mhaarman(_at_)ibsys(_dot_)c cc:
om> Subject: RE:
[xsl] Date Difference
12/19/2005 04:33
PM
Please respond to
xsl-list
Three questions below.
From: David Carlisle
I basically have two strings : "9/11/2004" and "10/25/2005"
and would like to produce the number of days between the two.
I didn't know there was a month 25.
(M)M/DD/YYYY is a standard lexical representation in America.
XSLT2 has date arithmetic built in but only if you have your
dates in a
standard format
I had a moment this morning and have been meaning to *get a
round tuit* and
begin with XSLT2. Reading the OP I said to myself: here is a
simple and
illustrative chore to undertake. I have raised a few questions.
I built an XML instance using the OP's datapoints:
testDate2.xml:
--------------
<?xml version="1.0"?>
<data>
<dateRange>
<date>9/11/2004</date>
<dateStandard>2004-09-11</dateStandard>
<date>10/25/2005</date>
<dateStandard>2005-10-25</dateStandard>
</dateRange>
</data>
testDate2.xsl:
--------------
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:fn="http://www.w3.org/2005/xpath-functions";
version="2.0"
exclude-result-prefixes="xs fn">
<xsl:template match="/">
<output>
<xsl:apply-templates/>
</output>
</xsl:template>
<xsl:template match="*/dateRange">
<!-- normalized data points -->
<xsl:variable name="earlier" select="dateStandard[1]"
as="xs:date"/>
<xsl:variable name="later" select="dateStandard[2]" as="xs:date"/>
<!-- padding month to two digits -->
<xsl:variable name="earlierPadded">
<xsl:choose>
<xsl:when
test="fn:string-length(substring-before(date[1], '/')) =
1">
<xsl:value-of select="concat('0',date[1])"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="date[1]"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:variable name="laterPadded">
<xsl:choose>
<xsl:when
test="fn:string-length(substring-before(date[2], '/')) =
1">
<xsl:value-of select="concat('0',date[2])"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="date[2]"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<!-- get standardized date strings -->
<xsl:variable name="regexE"
select="xs:date(fn:replace($earlierPadded, '(.*)/(.*)/(.*)',
'$3-$1-$2'))"/>
<xsl:variable name="regexL"
select="xs:date(fn:replace($laterPadded, '(.*)/(.*)/(.*)',
'$3-$1-$2'))"/>
<durationLaterFromEarlier>
<xsl:value-of select="$later - $earlier"/>
</durationLaterFromEarlier>
<durationEarlierFromLater>
<xsl:value-of select="$earlier - $later"/>
</durationEarlierFromLater>
<durationLaterFromEarlier>
<xsl:value-of select="$regexL - $regexE"/>
</durationLaterFromEarlier>
<durationEarlierFromLater>
<xsl:value-of select="$regexE - $regexL"/>
</durationEarlierFromLater>
</xsl:template>
</xsl:stylesheet>
Using Saxon 8, this yields the desired result:
result.xml
--------------
<?xml version="1.0" encoding="UTF-8"?>
<output>
<durationLaterFromEarlier>P409D</durationLaterFromEarlier><dur
ationEarlierFr
omLater>-P409D</durationEarlierFromLater><durationLaterFromEar
lier>P409D</du
rationLaterFromEarlier><durationEarlierFromLater>-P409D</durat
ionEarlierFrom
Later>
</output>
Questions:
A)
Is there a reason the operators described within the op:
namespace in the
CR
are not available? I began with statements like:
op:subtract-dates($earlier, $later)
and only much later found the sentences clarifying these operators:
<quote>
Functions defined with the op prefix are described here to
underpin the
definitions of the operators in [XML Path Language (XPath)
2.0], [XQuery
1.0: An XML Query Language] and [XSL Transformations (XSLT)
Version 2.0].
These functions are not available directly to users, and there is no
requirement that implementations should actually provide
these functions.
</quote>
The functional notation seems much more intuitive to me than using
arithmetic operations on dates. Which is the greater value?
Simple math
on
date values was drummed out of me very early in my
grade-school career.
B)
This statement:
<xsl:variable name="later" select="dateStandard[2]" as="xs:date"/>
seemed to work fine, but this one later:
<xsl:variable name="regexE"
select="fn:replace($earlierPadded, '(.*)/(.*)/(.*)', '$3-$1-$2')
as="xs:date"/>
threw an error when the value of $regexE was used in the
later arithmetic,
complaining that it was still a string. Stating it in the
following manner
corrected the error:
<xsl:variable name="regexE"
select="xs:date(fn:replace($earlierPadded, '(.*)/(.*)/(.*)',
'$3-$1-$2'))"/>
I suspect I am missing an implicit cast somewhere that makes the first
statement work and renders the as= attribute moot.
C)
Any idiomatic corrections to the stylesheet or notational shortcuts I
missed?
TIA,
Mike
-----------------------------------
Mike Haarman,
XSL Developer,
Internet Broadcasting Systems, Inc.
--~------------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail:
<mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--
**************************************************************
***********
This message and any attachments (the "message") are confidential and
intended solely for the addressees.
Any unauthorised use or dissemination is prohibited.
E-mails are susceptible to alteration.
Neither SOCIETE GENERALE nor any of its subsidiaries or affiliates
shall be liable for the message if altered, changed or falsified.
**************************************************************
***********
--~------------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail:
<mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--
--~------------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail: <mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--