Question - what kind of regex is used in the Regular Expression Search? Is this PERL or SAS regex? The reason I ask is that I could not get the following regex to work in my program editor:

^\d{1,3}\s

However it works fine in datastep (see post below):
http://stackoverflow.com/questions/13483640/sas-regex-to-match-1-3-digits/13483658#13483658