XPath to select all attributes and values

user_841258 0
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I'm working with some XML that keeps all its data in attributes. I'm needing to extract that for processing the data. So we have something like:

<data>
  <level1>
    <level2 att1="1">
      <level 3>
        <level 4 att2="a" att3="b" att4="c" />
      </level 3>
      <level 3>
        <level 4 att2="1" att3="2" att4="3" />
      </level 3>
    </level 2>
    <level 2 att1="2">

So i'm wanting all attributes from the level 4 entries and their values, but ONLY from level2 entries where att1 = 1. I'm new to XPath, so I haven't worked it out yet. So far, the best I've come up with is:

/data/level1/level2[@att1='1']/level3/level4[@*]

but that is returning empty data. Any help would be appreciated.

xpath
1 Answers

To get all the desired attribute values, you only have to make a little change to your XPath expression like this (remove the last predicate to directly access the attributes):

/data/level1/level2[@att1='1']/level3/level4/@*

Iterating over this expression's nodeset gives you all the desired values and, if wanted, their attribute's names.

user_13059690
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