[xsl] Re: Capturing/testing results of a boolean expression.

["Edward L. Knoll" <ed dot knoll at cosd dot fedex dot com>]

Maybe details are called for, because as I gnaw at this problem and read
archives I realize the trick might be to establish an expression which
returns a "boolean" as opposed to an expression which returns a
"results-tree-fragment".

I have a variable which will have a string value.  I wish to compare
that string value to another string value (which happens to be a literal
value).  I've done this directly in a xsl:if or xsl:when before, but now
I'm trying to capture the results of the expression in a variable.

<xsl:variable name="X" ..../>

<xsl:variable name="flag" select="$X = 'literal-string-value'" />

Is there a way to do this that returns a 'boolean' and not a
'results-tree-fragment'?

Is there a way to take a 'results-tree-fragment' which has the value
"true" or "false" and turn it back into the equivalent 'boolean' value?

Thanks again,
Ed Knoll


> I have state information I need/wish to capture in a
> "boolean" variable.   I need to use the result of the expression in
> multiple places; I do not wish to replicate the expression everywhere it
> is needed for maintenance reasons.  The value is "static" and I can
> establish it at a global context.
> 
> I have yet to figure out how to do it.  No matter what I try I get a
> position evalution of the variable.  I can print the variable and see
> that I am getting the correct boolean value (true or false).    How do
> I capture the results of a boolean expression in a variable and how can
> I then test the value of that variable?
> 
> Please don't ask for details; I don't want specific point-source
> alternatives for how to work around the issue  I want to how to capture
> the results of a boolean expression and then use those results later in
> a conditional expression (e.g. xsl:if or xsl:when).
> 
> Thanks,
> Ed Knoll
> 
> --
> Edward L. Knoll   Phone (work)     : (719)484-2717
>                   e-mail (work)    : f49660c@cosd.fedex.com
>                   e-mail (business): eknoll@sf-inc.com
>                   e-mail (personal): edward@elknoll.com

-- 
Edward L. Knoll   Phone (work)     : (719)484-2717
                  e-mail (work)    : ed.knoll@cosd.fedex.com
                  e-mail (business): eknoll@sf-inc.com
                  e-mail (personal): edward@elknoll.com

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