Magento user agent regex XML from magento/app/code/core/Mage/Core/etc/system.xml

gistfile1.txt

 <ua_regexp translate="comment">
                            <label></label>
                            <frontend_model>adminhtml/system_config_form_field_regexceptions</frontend_model>
                            <backend_model>adminhtml/system_config_backend_design_exception</backend_model>
                            <sort_order>2</sort_order>
                            <show_in_default>1</show_in_default>
                            <show_in_website>1</show_in_website>
                            <show_in_store>1</show_in_store>
                            <comment>Match expressions in the same order as displayed in the configuration.</comment>
  </ua_regexp>