Re: [xsl] How do you ensure that data is not altered/corrupted in a transformation?

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

On 5/19/2023 10:37 AM, Roger L Costello costello@xxxxxxxxx wrote:
> In certain domains loss of life may occur if data is altered/corrupted in
any way.
> Suppose you write an XSLT program which transforms this:
>
> <alt>12000 feet</alt>
>
> to this:
>
> <altitude>12000 feet</altitude>
>
> How do you ensure that the data -- 12000 feet -- was not altered/corrupted
in the transformation?


What does altered refer to? If you make sure the XSLT copies the `alt`
element's content to the result `altitude` element you can do that with e.g.

<xsl:template match="alt">

B  <altitude>{.}</altitude>

</xsl:template>


What does "corrupted" refer to? That file IO fails to properly create
the transformation result? Do you expect to catch such errors with XSLT?

For (processing/validation) pipelines (outside the system failure scope)
you can use XProc or XSpec, I would think, to test the value in some
result (step) is the same as the value in (some/the) input step.