| Data | Language.Drasil |
| Dbl | Language.Drasil.Literal.Development |
| dbl | Drasil.Code.CodeExpr, Language.Drasil |
| dcc | Language.Drasil |
| dccA | Language.Drasil |
| dccAWDS | Language.Drasil |
| dccWDS | Language.Drasil |
| Dec | Language.Drasil |
| Decoration | Language.Drasil.Display, Language.Drasil |
| DecRef | Language.Drasil |
| defaultUncrt | Language.Drasil |
| Deferred | Language.Drasil |
| DefinedQuantityDict | Language.Drasil |
| Defines | Language.Drasil.ModelExpr.Development |
| defines | Language.Drasil |
| DefinesQuantity | Language.Drasil |
| Defini | Language.Drasil |
| DefiningCodeExpr | Drasil.Code.CodeVar |
| DefiningExpr | Language.Drasil |
| Definition | Language.Drasil |
| Definitions | Language.Drasil |
| defint | Drasil.Code.CodeExpr, Language.Drasil |
| defLhs | Language.Drasil |
| defn | Language.Drasil |
| defnAs | Language.Drasil.Sentence.Combinators |
| defnExpr | Language.Drasil |
| defprod | Drasil.Code.CodeExpr, Language.Drasil |
| defsum | Drasil.Code.CodeExpr, Language.Drasil |
| Delta | Language.Drasil.Display |
| denotes | Language.Drasil.Sentence.Combinators |
| derCUC | Language.Drasil |
| derCUC' | Language.Drasil |
| derCUC'' | Language.Drasil |
| Deriv | Language.Drasil.ModelExpr.Development |
| deriv | Language.Drasil |
| DerivBlock | Language.Drasil |
| DerivType | Language.Drasil.ModelExpr.Development, Language.Drasil |
| derUC | Language.Drasil |
| derUC' | Language.Drasil |
| derUC'' | Language.Drasil |
| Desc | Language.Drasil |
| dgnl2x2 | Language.Drasil |
| Dim | Language.Drasil.ModelExpr.Development, Language.Drasil.Expr.Development, Drasil.Code.CodeExpr.Development |
| dim | Drasil.Code.CodeExpr, Language.Drasil |
| Discrete | Language.Drasil |
| DiscreteDomainDesc | Language.Drasil |
| Document | |
| 1 (Type/Class) | Language.Drasil |
| 2 (Data Constructor) | Language.Drasil |
| DomainDesc | Language.Drasil |
| Dot | Language.Drasil.ModelExpr.Development, Language.Drasil.Expr.Development, Drasil.Code.CodeExpr.Development |
| dqd | Language.Drasil |
| dqd' | Language.Drasil |
| dqdNoUnit | Language.Drasil |
| dqdNoUnit' | Language.Drasil |
| dqdQd | Language.Drasil |
| dqdWr | Language.Drasil |
| dRef | Language.Drasil |
| dRefInfo | Language.Drasil |
| DType | Language.Drasil |