How to get a interval value from path replacement?

I'm using  path replacement  in a web template as follow:

<bi:ACTION type="CHOICE" value="INSTRUCTION" >

  <bi:INSTRUCTION >

    <bi:SET_ITEM_PARAMETERS >

        <bi:cmd_item_parameters type="INPUT_FIELD_ITEM" >

             <bi:TEXT_CONTENT path="VARIABLE_CONTAINER?/VARIABLES/VARIABLE[3]/SELECTIONS/SELECTION[1]/MEMBER/@name" />

        </bi:cmd_item_parameters>

    <bi:TARGET_ITEM_REF value="INPUT_FIELD_ITEM_1" />

  </bi:SET_ITEM_PARAMETERS>

  </bi:INSTRUCTION>

</bi:ACTION>

It work fine if a variable return one value (OPT=EQ), but not work if a variable return a interval value(OPT=BT). Please help to solve the problem. How i can to get interval value?