xml - get number of columns

[wind]

My XML looks like this:

<row>
   <column name="name">c1</column>
   <column name="address">c2</column>
</row>
<row>
   <column name="name">c11</column>
   <column name="address">c22</column>
</row>

<row>
   <column name="name">c1</column>
   <column name="address">c2</column>
</row>
<row>
   <column name="name">c11</column>
   <column name="address">c22</column>
</row>

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Is there any easy way to get the numbers of columns in a row?
btw: The number of columns is in all rows the same.