xml - How to get a specific node value with xpath when id is in element instead of attribute? -

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with xpath /levels/level[@id="3"]/value can value of level id=3 this:

<levels>      <level id="2">           <value>25</value>      </level>      <level id="3">           <value>33</value>      </level>      <level id="4">           <value>44</value>      </level> </levels>

but xml reading formatted without attributes this:

<levels>      <level>           <id>2</id>           <value>25</value>      </level>      <level>           <id>3</id>           <value>33</value>      </level>      <level>           <id>4</id>           <value>44</value>      </level> </levels>

what equivalent xpath second xml block value of level id=3? (it not guaranteed id=3 second node.)

how following:

/levels/level[id/text() = "3"]/value

or 

/levels/level[id/. = "3"]/value

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