| radian | Data.Drasil.SI_Units |
| Range | Language.Drasil |
| rate | Data.Drasil.Concepts.Math |
| Rational | Language.Drasil |
| rationale | Language.Drasil |
| raw | Drasil.Database |
| RawContent | Language.Drasil.Document |
| rawUni | Drasil.Database |
| rbrtsn2012 | Data.Drasil.Citations |
| rcHibbeler | Data.Drasil.People |
| RConcat | Language.Drasil |
| readAsset | Drasil.Assets |
| readerCharsLabel | Drasil.SRS.Concepts |
| ReadME | Language.Drasil.Code |
| readMe | Language.Drasil.GOOL |
| readWithDataDesc | Language.Drasil.Code |
| Real | Language.Drasil |
| RealI | |
| 1 (Data Constructor) | Language.Drasil.Expr.Development |
| 2 (Data Constructor) | Language.Drasil.ModelExpr.Development |
| 3 (Data Constructor) | Drasil.Code.CodeExpr.Development |
| RealInterval | Language.Drasil |
| realInterval | |
| 1 (Function) | Drasil.Code.CodeExpr, Language.Drasil |
| 2 (Function) | Drasil.Code.CodeExpr.Development |
| realtime | Data.Drasil.Concepts.Documentation |
| reasVal | Language.Drasil |
| recip_ | Language.Drasil |
| recordArg | Language.Drasil.Code |
| recordArgFill | Language.Drasil.Code |
| RecordF | Language.Drasil.Code |
| rectilinear | Data.Drasil.Concepts.Physics |
| rectPosDeriv | Drasil.Projectile.Derivations |
| rectVel | Drasil.Projectile.Concepts |
| rectVelDeriv | Drasil.Projectile.Derivations |
| Ref | Language.Drasil |
| ref | Language.Drasil.Document |
| refAdd | Language.Drasil |
| RefBy | Drasil.SRS |
| refBy | Data.Drasil.Concepts.Documentation, Drasil.Metadata.Documentation |
| refbyLookup | Drasil.System |
| refbyTable | Drasil.System |
| Referable | Language.Drasil |
| Reference | |
| 1 (Data Constructor) | Drasil.GProc, Drasil.GOOL |
| 2 (Type/Class) | Drasil.GProc, Drasil.GOOL |
| 3 (Data Constructor) | Language.Drasil |
| 4 (Type/Class) | Language.Drasil.Document |
| 5 (Data Constructor) | Language.Drasil.Document |
| reference | |
| 1 (Function) | Data.Drasil.Concepts.Documentation, Drasil.Metadata.Documentation |
| 2 (Function) | Drasil.SRS.Concepts |
| referenceLabel | Drasil.SRS.Concepts |
| referenceType | Drasil.GProc, Drasil.GOOL |
| refineChain | Language.Drasil.Document |
| RefInfo | Language.Drasil |
| refInfo | Language.Drasil.Document |
| refMat | |
| 1 (Function) | Data.Drasil.Concepts.Documentation, Drasil.Metadata.Documentation |
| 2 (Function) | Drasil.SRS.Concepts |
| refMatLabel | Drasil.SRS.Concepts |
| refName | Data.Drasil.Concepts.Documentation, Drasil.Metadata.Documentation |
| RefNote | Language.Drasil |
| RefProg | Drasil.SRS |
| refS | Language.Drasil.Document |
| RefSec | |
| 1 (Type/Class) | Drasil.SRS |
| 2 (Data Constructor) | Drasil.SRS |
| RefTab | Drasil.SRS |
| refTable | Drasil.System |
| registered | Drasil.Database |
| RegularF | Language.Drasil.Code |
| Relation | Language.Drasil.Expr.Development, Language.Drasil |
| RelationConcept | Theory.Drasil |
| RelativeFile | Drasil.FileHandling.Legacy |
| relativeFile | Drasil.FileHandling.Legacy |
| relFileToStr | Drasil.FileHandling.Legacy |
| reliability | Data.Drasil.Concepts.Software |
| relTol | Language.Drasil.Code |
| relTolerance | Data.Drasil.Concepts.Computation |
| render | Drasil.LessonPlan |
| renderCSV | Drasil.Data.Formats.CSV |
| renderJSON | Drasil.Data.Formats.JSON |
| renderRef | Language.Drasil |
| RenderSpecial | Language.Drasil |
| rendPersLFM | Language.Drasil |
| rendPersLFM' | Language.Drasil |
| rendPersLFM'' | Language.Drasil |
| repeated | Language.Drasil.Code |
| Replace | Language.Drasil |
| replaceAll | Data.List.Extras |
| replaceInvalidChars | Drasil.Meta.Analysis.DataPrinters.Dot |
| repUnd | Data.String.Extras |
| reqDom | Data.Drasil.Concepts.Documentation, Drasil.Metadata.Documentation |
| reqInput | Data.Drasil.Concepts.Documentation, Drasil.Metadata.Documentation |
| reqInputsRef | Drasil.SRS |
| reqNF | Drasil.Metadata.TraceabilityGraphs |
| ReqrmntSec | |
| 1 (Type/Class) | Drasil.SRS |
| 2 (Data Constructor) | Drasil.SRS |
| ReqsProg | Drasil.SRS |
| reqsScopeLabel | Drasil.SRS.Concepts |
| ReqsSub | Drasil.SRS |
| require | Drasil.SRS.Concepts |
| requiredChecks | Language.Drasil |
| requirement | Data.Drasil.Concepts.Documentation, Drasil.Metadata.Documentation |
| requirementsLabel | Drasil.SRS.Concepts |
| RequiresChecking | Language.Drasil |
| resolveBibliography | Language.Drasil.Document |
| response | Data.Drasil.Concepts.Documentation |
| restitutionCoef | |
| 1 (Function) | Data.Drasil.Concepts.Physics |
| 2 (Function) | Data.Drasil.Quantities.Physics |
| result | Data.Drasil.Concepts.Documentation |
| returnExprList | Language.Drasil.Code |
| returnExprListFill | Language.Drasil.Code |
| returnStmt | Drasil.GProc, Drasil.GOOL |
| reusability | Data.Drasil.Concepts.Software |
| Review | Drasil.LessonPlan |
| review | Data.Drasil.Concepts.Documentation, Drasil.Metadata.Documentation |
| reviewer | Data.Drasil.Concepts.Documentation |
| rGuy | Data.Drasil.People |
| rHuston | Data.Drasil.People |
| rightHand | Data.Drasil.Concepts.Math |
| rightSide | Data.Drasil.Concepts.Math |
| rigidBody | Data.Drasil.Concepts.Physics |
| RK45 | Language.Drasil.Code |
| rKhedri | Data.Drasil.People, Drasil.Metadata.People |
| rodPierce | Data.Drasil.People |
| rOfChng | Data.Drasil.Concepts.Math |
| RowCount | Drasil.Data.Formats.CSV |
| rowCount | Drasil.Data.Formats.CSV |
| rows | Drasil.Data.Formats.CSV |
| rowVec | Language.Drasil |
| RP | Language.Drasil |
| RS | Language.Drasil |
| RTopology | Language.Drasil |
| Rule | Drasil.Makefile |
| runnableSoftware | Drasil.Metadata.SupportedSoftware |
| runStrategy | Drasil.GOOL |