MM, It can apply to the model where it is optional (page 144 of IBIS 5.0 pdf) | ) | End of Model_Specific section | (Description <string>) | description of the model | | (optional) In all other places it is required, or it is implied that it is required. I personally think that it should not be required for Reserved Parameters (the standard describes what they are and what they do), and should be required for all Model Specific parameters (to at least force the model maker to document what he is exposing to the user intelligently). But the spec says it is always required (except for the model itself). Bonus question: " " is a valid string. Walter Walter Katz 303.449-2308 Mobile 720.333-1107 wkatz@xxxxxxxxxx www.sisoft.com -----Original Message----- From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx]On Behalf Of Mirmak, Michael Sent: Wednesday, September 09, 2009 12:37 PM To: IBIS-ATM Subject: [ibis-macro] Description required for Reserved Parameters in AMI files? A simple question for AMI experts: is "Description" required for Reserved Parameters in AMI files? On page 144 of IBIS 5.0 (PDF version), the following text appears: | ... All reserved | parameters must be in the following format: | | (parameter_name (Usage <usage>)(Type <data_type>) | (Default <values>) (Description <string>)) However, few of the given examples actually follow this usage of Description. Which is correct? Thanks in advance... - MM PS Bonus question: is a null or empty string permissible in "Description?" --------------------------------------------------------------------- IBIS Macro website : http://www.eda.org/pub/ibis/macromodel_wip/ IBIS Macro reflector: //www.freelists.org/list/ibis-macro To unsubscribe send an email: To: ibis-macro-request@xxxxxxxxxxxxx Subject: unsubscribe --------------------------------------------------------------------- IBIS Macro website : http://www.eda.org/pub/ibis/macromodel_wip/ IBIS Macro reflector: //www.freelists.org/list/ibis-macro To unsubscribe send an email: To: ibis-macro-request@xxxxxxxxxxxxx Subject: unsubscribe