Library Design Parameter Batch Edit

Hi All,

Over the past couple of years I have accumulated a quite extensive collection of padstacks and symbols in my local library, from the last few versions of Allegro, although I'm now using 16.5 with latest SR.  The padstacks and symbols have assumed an annoying set of mis-matched and inconsistent design parameters apparently derived from the tool environments from when they were last created, edited or exported.  In trying to become "design librarian" for a while and go fix them for consistency, I have been looking at what is seemingly the endless volume of Cadence help and documentation. 

To short-cut the frustration,  can anyone point me to a cheatsheet or list of which design parameters are actually saved with the individual padstack and symbol files as opposed to being picked up by the tool environment? 

I have been playing with "prmed" and importing and exporting parameter files.  Some things get over-written on import, while others get added such as text block definitions.  The end result is frustrating to say the least.  The behavior of pad_designer versus symbol editor is also different.

Individually editing each symbol in my libraries is also an overwhelming task.  Could any experts here suggest the easiest way to attempt batch editing of symbol/pad parameters for consistency throughout.  First I would like to tackle the padstacks with such things as "units" and "decimal places" and text sizes then move on to consistent dimensions for soldermask and anti-pad clearances.

Thanks in advance for your suggestions!

Roger