I got my views handler test code working for node title, and now I'm trying to get the real code working with a content-type additional field (D7). My problem is that in calling hook_views_data_alter, the data array is different for a custom content-type field than it is for node_title, and I'm getting lost in it trying to figure out what the index is that I need to override in order to use my own field handler (I'm assuming that I need to override, that if I were not creating a custom handler the field would be using a default one) The field is field_test, and the major headings in the data array are: [field_data_field_test] => Array [table] => Array [entity_id] => Array ... [field] => Array [field_test_value] => Array [argument] => Array [filter] => Array [field_test_format] => Array [argument] => Array [filter] => Array Thanks in advance. I'll try to move on to a different obscure issue after this :-) Jeff