Use the ARG_TYPE field to specify the data types for which the action is valid. Use the data attribute name.
You can enter a list of data types; separate the entries with commas.
For example, the following action definition assumes a GIF data type has been created.
ACTION Open_Gif { TYPE COMMAND LABEL "Display Gif" WINDOW_TYPE NO_STDIO ARG_TYPE Gif ICON xgif DESCRIPTION Displays gif files EXEC_STRING xgif }