Thx for your response Sajid

1.- My aplication is in chemical plants, i want to implement ISA 5.1 to replase our old tagging identification.

2.- I felt more comfortable with the (i think) 80s edition with a lot of examples in the standard. Now in the intruduction of 2009 ed. I quote:

(10) The extensive examples in previous versions of this standard that illustrated identification and
symbolization definitions and methods have been removed and will be moved to technical reports that will
be prepared after publication of this revised standard.

Im looking if ISA already published those "technical reports" or other publication with examples.

My doubts and consers are in general in the interpretation of the standard, its harder for me to understand the "standard lenguage" that it is write on.

Are there other publication of ISA that could be of use for me?

Best regards