Re: [xsl] Comparing two dates when one is potentially malformed

["Wolfgang Laun wolfgang.laun@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

If all the "malformed forms" are due to omitted seconds and if it is only
the date you are interested in, truncate values at the separator 'T' and
compare the date. Even a string comparison would work on the yyyy-mm-dd
formatted values. Or truncate at the length that includes hh:mm and
compare.

-W

On 5 December 2016 at 05:03, Bridger Dyson-Smith bdysonsmith@xxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hi all --
>
> I'm wondering about best practices when dealing with potentially malformed
> dates. I confess that I haven't worked with dates (xs:date, xs:time,
> xs:dateTime) very much and so I'm not sure if I'm thinking about things
> correctly.
>
> I have the following input:
>     <test>
>         <field name="publication_date" type="date">
>             <value>2011-12-01T00:00-08:00</value>
>         </field>
>         <field name="embargo_date" type="date">
>             <value>2011-12-01T00:00-08:00</value>
>         </field>
>         <submission-date>2011-11-17T08:11:17-08:00</submission-date>
>         <publication-date>2011-12-01T00:00-08:00</publication-date>
>     </test>
>
> And I'd like to do a comparison check on the field[@name='embargo_date']
> vs the output of current-dateTime(). I have the following stylesheet:
>
> <?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";
>     exclude-result-prefixes="xs"
>     version="2.0">
>
>     <xsl:output encoding="UTF-8" indent="yes" method="xml"/>
>
>
>     <xsl:variable name="c-dateTime"
>                   select="dateTime(xs:date(format-date(current-date(),
> '[Y]-[M,2]-[D,2]')),
>                                    xs:time(format-time(current-time(),
> '[H]:[m]:[s][Z]')))"/>
>
>   <xsl:template match="/">
>       <xsl:variable name="test-dateTime" as="xs:dateTime"
> select="test/field[@name='embargo_date']/value"/>
>
>       <result><xsl:value-of select="if ($test-dateTime ge $c-dateTime )
> then 'embargo me!' else 'all clear!'"/></result>
>     </xsl:template>
> </xsl:stylesheet>
>
> I'm using Saxon HE-9.6.0.7 in oXygen 18.1, which gives me a compile time
> error of "FORG0001: Invalid dateTime value "2018-12-01T00:00-08:00" (Wrong
> delimiter after minute)".
>
> Is the right thing to do here to do some string parsing on the substrings
> in the values that I need to check? Is there some other way to convert the
> value in field[@name='embargo_date'] into an xs:dateTime?
>
> Thanks for your time and trouble.
> Best,
> Bridger
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