Correct XML path/filter expression to capture PO status?

In Oracle Integration Cloud, we are subscribing to PO header business events. We need to filter those events so the integration triggers only when the PO Header Status column has a specific value. What is the correct XML path/filter expression to use?

Basically We have a requirement to capture the status of PO whenever it becomes open and put it on hold using OIC integration and we need a filter/xml expression for that