EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH

Logical Attributes

Many commands in MAD require the setting of logical values (flags) to represent the on/off state of an option. A logical value "flag" can be set in two ways: 
flag | flag = true
It can be reset by: 
-flag | flag=false
Example: 
option,-echo;  // switch off copying the input to the standard output
The default for a logical flag is normally false, but can be found e.g. for options by the command 
help,option;
hansg, May 8, 2001