Predicates

I have the following predicate:

var predicate = "$record.TopMerchants.Record[*]";

var nodeitems = $data.resolveNodes(predicate);

which searches an XML structure similar to the following:

<TopMerchants>

     <Record>

          <Country>United Kingdom</Country>

          <X1>testing</X1>

          <X2>testing again</X2>

     </Record>

     <Record>

          <Country>United Kingdom</Country>

          <X1>testing</X1>

          <X2>testing again</X2>

     </Record>

     <Record>

          <Country>United States</Country>

          <X1>testing</X1>

          <X2>testing again</X2>

     </Record>

</TopMerchants>

This works fine in retrieving all of the records under the TopMerchants node, however what I really want is to be able to bring back records that have a specific country but I am not sure how this is done in the predicate, can anyone shed any light as to how you would achieve this??