I created a public list (directory) of members based on a relationship. I was able to set-up a smart group with a profile and can see the list. But I want to customize the list by country, without creating a profile for each country. I read that you can append the url like this: civicrm/profile&reset=1&force=1&gid=N&city=London
But it is not working. What is the field name for countries? Are country names stored as an integer or a text value such as France? How do I get a list of fields and values for CiviCRM? Thanks for your help.