Re: [xsl] Re: How to express this in XPath: "when condition do action" where condition cannot be evaluated until data arrives later

["Andre Cusson akhu01@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi,

Graydon's approach seems the simplest.
Alternatively, one could build a temporary tree/file of the info on cars
not yet reported as stolen, which gets updated/processed anytime a police
report comes in.

Regards.

Le mar. 20 dC)c. 2022, C  08 h 58, Graydon graydon@xxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> a C)crit :

> On Tue, Dec 20, 2022 at 01:46:22PM -0000, Roger L Costello
> costello@xxxxxxxxx scripsit:
> > Let me relax my requirement that the "when condition do action"
> functionality be implemented exclusively in XPath. Let's also allow XSLT.
> Also, let's allow extension functions.
> >
> > Given those relaxed requirements, could the functionality that I seek be
> implemented like this:
> >
> > Read the next XML document.
> > If the XML document contains data about cars then
> >     Call an XSLT function, f:waitForPoliceReport()
>
> Why not run the XSLT in response to the police report arriving?
>
> It's easy to consume the police report (presumably into a map) and then
> do the processing on the other data source.
>
> It looks like all the difficulty comes in because you're thinking of the
> conceptual "processing is delayed for the report" as something that has
> to be implemented literally.
>
> --
> Graydon Saunders  | graydonish@xxxxxxxxx
> CC&s oferC)ode, C0isses swC! mC&g.
> -- Deor  ("That passed, so may this.")