We are starting to use the Regex pattern matching by allowing users to write "rules" using patterns. For example, our data lookup processing can include a 'Per' rule that takes a key such as 'xPerY' and returns the value of (data at: #x) / (data at: #y). Until recently, all binary-operators such as Per were performed with a simple string matches. But in order to generalize, we are moving regex patterns.

Can someone tell me where the language-spec is for Regex-Core that is included in Pharo? Is this in the style of sed, awk, or ... ? If possible, how do I indicated that I want several sub-string replacement sections?

Thanks in advance.

-Cam