Page Comparison

...

1. Add a Single/Multiple Answer Lookup Table:
   
2. Click on the "Lookup Table Data" question
   
   
3. Edit the following fields:
   1. Lookup Table: ignore that for now
   2. Value Field: what you want to save as an answer (usually an id or a code). For locations you can use site_code or @id.
   3. Label Field: what you want to display to the user. For locations you can use name
   4. (Optional) Filter: can be used to filter the locations displayed.
      
      
4. The tricky part is now to modify the xml to point the question to the location table. To do so:
   1. Click on Tools / Edit Source XML on the top right corner of the form builder:
      
   2. In the XML search for a select1 node holding your lookup question. It should look like this:
      
      
      In this example my lookup question is /data/location_loookup
   3. Then in the expression <itemset nodeset="instance('products')/products/product">, replace the instance with the instance of your location. For example
      1. if you want to display the list of states: instance instance('locations')/states/state
      2. if you want to select display the list of districts of a previously selected state: instance('locations')/states/state[site_code=/data/state_selected]/districts/district
         where /data/state_selected is the state previously selected.