Examples of how they appear within the code:
- 1:16
- 1:58.3
- 2:131.1
- 33:9681
- 46:236.11.4
- 47:287.663
- 47:9081
Often prefixed by "RS" or "R.S."
((R(\.?)S(\.?)\s)?)([0-9]{1,2}):([0-9]{1,4})((\.[0-9]+)*)
May omit ((R(\.?)S(\.?)\s)?) for broader matching with relatively high confidence that it will not result in overbroad matching.