Question

I’d like to do some math with some elements which contain a - in their name:

<containers>
  <container>
    <max-capacity>10</max-capacity>
    <content>5</content>
  </container>
  <container>
    <max-capacity>10</max-capacity>
    <content>8</content>
  </container>
</containers>

I’d like to execute an xpath query which counts the number of containers having a remaining capacity of > 2

count(containers/container[max-capacity-content>2])

but since there is a - in the name of the node max-capacity this doesn’t work.

What do I have to do to make this work?

(I don’t want to transform the xml to a --free document.)

Answer 1

Add spaces – containers/container[max-capacity - content > 2] works according to http://www.xpathtester.com/test, and should work within a count() expression such as yours as well.