How to ignore repeated numbers from text file comparison

[varun]

I am comparing two text files. Both the files have 11 digit ID's which I don't want to compare.
How I can I ignore those Id's using regular expression
Id example: 00000123456, 00000123457, 00000123458
I don't want to compare the value in my text file and want to ignore these.
Can someone please let me know how I can do it?

[Aaron]

Hello,

You would define a grammar to match on this text, then mark that grammar element name as Unimportant. We have a KB article and video here:
http://www.scootersoftware.com/suppo..._unimportantv3

Would any 11 digits be an ignore-able number? \d{11} as a RegEx?