Context plugin data:

    'title' => Visible title
    'description' => Description of context
    'context' => Callback to create a context. Params: $empty, $data = NULL, $conf = FALSE
    'settings form' => Callback to show a context setting form. Params: ($conf, $external = FALSE)
    'settings form validate' => params: ($form, &$form_values, &$form_state)
    'settings form submit' => params: 'ctools_context_node_settings_form_submit',
    'keyword' => The default keyword to use.
    'context name' => The unique identifier for this context for use by required context checks.
    'no ui' => if TRUE this context cannot be selected.