Re: [xsl] How to dynamically evaluate an equation in the input XML document?

["Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi Roger,

> The document contains an equation which might contain variables. If it
does contain variables, then I need to fetch their values and replace the
variables in the equation with their values and then compute the value of
the equation.
>
>   Have you done this kind of dynamic equation solving using XSLT? If so,
how did you do it?

<xsl:evaluate> can be used to accomplish this.

However, this poses a definite security risk -- the input may be an
"injection" aiming to obtain valuable sensitive information, or do harm via
side-effects.

Cheers,
Dimitre

On Wed, Jul 14, 2021 at 11:48 AM Roger L Costello costello@xxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hi Folks,
>
> I have XML documents like this:
>
> <Convert-to-Celsius>
>     <equation>(Fahrenheit - 32) * (5/9)</equation>
>     <variable>
>         <name>Fahrenheit</name>
>         <value>32</value>
>     </variable>
> </Convert-to-Celsius>
>
> The document contains an equation which might contain variables. If it
> does contain variables, then I need to fetch their values and replace the
> variables in the equation with their values and then compute the value of
> the equation.
>
> Have you done this kind of dynamic equation solving using XSLT? If so, how
> did you do it?
>
> Any suggestions on how to approach this problem would be appreciated.
>
> /Roger
> 
>
>

-- 
Cheers,
Dimitre Novatchev
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