| Range | Language.Drasil.Constraint, Language.Drasil |
| Rational | Language.Drasil.Space, Language.Drasil |
| raw | Language.Drasil.Label.Type |
| RawContent | Language.Drasil.Document.Core, Language.Drasil |
| RConcat | Language.Drasil.Label.Type, Language.Drasil |
| Real | Language.Drasil.Space, Language.Drasil |
| RealI | |
| 1 (Data Constructor) | Language.Drasil.Expr.Lang, Language.Drasil.Expr.Development |
| 2 (Data Constructor) | Language.Drasil.ModelExpr.Lang, Language.Drasil.ModelExpr.Development |
| 3 (Data Constructor) | Drasil.Code.CodeExpr.Lang, Drasil.Code.CodeExpr.Development |
| RealInterval | Language.Drasil.Space, Language.Drasil |
| realInterval | |
| 1 (Function) | Language.Drasil.ModelExpr.Convert |
| 2 (Function) | Language.Drasil.Expr.Class, Drasil.Code.CodeExpr, Language.Drasil |
| 3 (Function) | Drasil.Code.CodeExpr.Convert, Drasil.Code.CodeExpr.Development |
| reasVal | Language.Drasil.Classes, Language.Drasil |
| recip_ | Language.Drasil.Expr.Class, Language.Drasil |
| Ref | Language.Drasil.Sentence, Language.Drasil |
| ref | |
| 1 (Function) | Language.Drasil.Reference, Language.Drasil |
| 2 (Function) | Language.Drasil.Document.Core |
| refAdd | Language.Drasil.Label.Type, Language.Drasil |
| Referable | Language.Drasil.Label.Type, Language.Drasil |
| Reference | |
| 1 (Type/Class) | Language.Drasil.Reference, Language.Drasil |
| 2 (Data Constructor) | Language.Drasil.Reference, Language.Drasil |
| RefInfo | Language.Drasil.Sentence, Language.Drasil |
| refInfo | Language.Drasil.DecoratedReference, Language.Drasil |
| RefNote | Language.Drasil.Sentence, Language.Drasil |
| refS | Language.Drasil.Reference, Language.Drasil |
| Relation | Language.Drasil.Expr.Lang, Language.Drasil.Expr.Development, Language.Drasil |
| RelationConcept | Language.Drasil.Chunk.Relation, Language.Drasil |
| renderRef | Language.Drasil.Label.Type, Language.Drasil |
| RenderSpecial | Language.Drasil.Unicode, Language.Drasil |
| rendPersLFM | Language.Drasil.People, Language.Drasil |
| rendPersLFM' | Language.Drasil.People, Language.Drasil |
| rendPersLFM'' | Language.Drasil.People, Language.Drasil |
| Replace | Language.Drasil.NaturalLanguage.English.NounPhrase.Core, Language.Drasil.NaturalLanguage.English.NounPhrase, Language.Drasil |
| requiredChecks | Language.Drasil.WellTyped, Language.Drasil |
| RequiresChecking | Language.Drasil.WellTyped, Language.Drasil |
| rowVec | Language.Drasil.Expr.Class, Language.Drasil |
| RP | Language.Drasil.Label.Type, Language.Drasil |
| RS | Language.Drasil.Label.Type, Language.Drasil |
| RTopology | Language.Drasil.Space, Language.Drasil |