XSLT to return boolean value if all tags are equal to value

Question

I have a xml:

    0
             


        

Answer 1

I want to implement logic that will return true if one of the success tags is equal to 0 and false if all of them are equal to 0.

First, let's make the truth table:

All zeros | None zero | Some zero, others not
-------------------------------------------
  False   |   False   |        True

Second, node-set comparison in XPath are existencial. So:

boolean(/soapenv:Envelope/soapenv:Body[success = 0 and success != 0])

It will return true or false boolean value.

This input

    0
    0
    1

With this stylesheet

Returns

true

Check it in http://www.utilities-online.info/xsltransformation/?save=ceed7a50-6a47-4c2c-b344-86ad3b3b0d92-xsltransformation