Re: [xsl] XPath expression to extract the hour offset from strings that express time offset from UTC?

["Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Am 12/13/2022 um 2:49 PM schrieb Roger L Costello costello@xxxxxxxxx:
> Hi Folks,
>
> I have strings that express time offset from UTC. Here are representative
examples:
> UTC+5
> UTC+1(+2DT)
> UTC-11
> UTC+4:30
> UTC+9:30(+10:30DT)
>
> In areas where daylight savings time is observed, the daylight savings time
is the part in parentheses.
> Some offsets have both an hour and minute. The minute portion is after the
colon.
> I need to extract the hour offset. So for the above examples, I need to
extract:
> +5
> +1
> -11
> +4
> +9
>
> This XPath expression seems to do the job:
>
> let $time := "UTC+9:30(+10:30DT)" return
>      if (contains($time,'(')) then
>          let $part := substring-after(substring-before($time,'('),'UTC')
return
>              if (contains($part,':')) then
>                  substring-before($part,':')
>              else
>                  $part
>      else
>          let $part := substring-after($time,'UTC') return
>              if (contains($part,':')) then
>                  substring-before($part,':')
>              else
>                  $part
>
> Is there a better (simpler, shorter) XPath expression for doing this?
I would consider analyze-string e.g.

B  analyze-string(., '^UTC([+-][0-9]{1,2})')/*:match/*:group[@nr =
1]/string()