Question

I am fairly new to XPATH and need to return a value from multiple XML objects when a certain node is equal to one of two values. The solution also needs to be namespace agnostic using local-name(). Given the following XML, I am looking to return all of the values of “B” where “A” is equal to either “4” or “5”.

<?xml version="1.0"?>
    <element>
        <A>3</A>
        <B>Value 1</B>
    </element>
    <element>
        <A>4</A>
        <B>Value 2</B>
    </element>
    <element>
        <A>5</A>
        <B>Value 3</B>
    </element>

I have tried many iterations of the following expression but cannot seem to get the syntax correct when I try to add the second value for “A”. I just can’t seem to figure out the correct syntax for an “or” expression. I have also considered the use of a union and couldn’t get that syntax correct either.

This works for when “A” equals a single value of “4” but how to I add the test for a value of “5” so that the result returns two values for “B” (“Value 2” and “Value 3”)?

//*[local-name()='element'][*[local-name()='A']='4']/*[local-name()='B']/text()

Thank you. Any help would be very much appreciated!

Answer 1

Try this:

//*[local-name() = 'element']/*[local-name() = 'A' and (. = 4 or . = 5)]
    /../*[local-name() = 'B']

This expression selects Value 2 and Value 3.