%explode(<&ref>, <delim>)
Split an string into multiple new strings based on a delimiter.
This expansion is the inverse of concat.
Example
&control.Tmp-String-0 := "bob.toba@domain.com"
&control.Tmp-String-1 := "%explode(&control.Tmp-String-0, '@')"
&reply.Reply-Message := "Welcome %{control.Tmp-String-1[0]}"
Output
Welcome bob.toba