I found something somewhere that said something like
[si]$avp(name)
or whatever. What the heck does [si] mean???
Was there a colon after the "[si]"? If so, then I'll bet [si] was
just a regular expression meaning "either the letter 's' or the
letter 'i'". My limited understanding is that every AVP reference
starts with either "i:" or "s:", depending on whether you're
referencing it by its integer name or its string-format name. (The
latter is more human-friendly, but slower.)
Tim