README.md in rast-0.9.0 vs README.md in rast-0.10.0

@@ -9,9 +9,10 @@
 `variables` - raw list of variables to be combined into multiple fixtures.
 `rule` - set of outcome paired with rule clause.
 `exemption/exclusions` - rule defining variable combinations to be excluded from the test.
 `outcome` - the left portion of a rule e.g. `true: true&true`
 `clause` - the right portion of a rule
+`token` - used loosely to denote the individual variable in a rule. e.g. `true: you & me`, 'you' and 'me' are tokens.
 
 
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 When running the tests, the execution starts at the spec file, then invoking the