Tag versioning workflow added.

README.md

@@ -17,3 +17,9 @@ ESS Reference & Lookup Tables
 * Beam Configuration: https://confluence.esss.lu.se/display/ABC/Beam+Configuration
 * Master events according to: ESS-1837307: Time Structure of the Proton Beam Pulses in the LINAC.
 
+# Tag versioning
+* MAJOR = {ProtNum}
+* MINOR = {ESS-0038258 revision, ProtVer}
+* PATH = {supercycle adds, bug corrections}
+
+e.g. 1.5.0 contains ProtNum == 1, ESS-0038258 revision == 5 and ProtVer == 5 and it is compatible with all 1.5.x.
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