| UNION | Language.VDM_SL.Syntax |
| UNION_TYPE | Language.VDM_SL.Syntax |
| UQLiteral | Language.Sdf.SdfLib, Language.Sdf.Syntax |
| UnicodeEscape | Language.Java.Syntax |
| Unlabelled_pl_statement | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c1 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c10 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c11 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c12 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c13 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c14 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c2 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c3 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c4 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c5 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c6 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c7 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c8 | Language.PLSql.Syntax |
| Unlabelled_pl_statement_c9 | Language.PLSql.Syntax |
| Update_statement |
| 1 (Type/Class) | Language.PLSql.Syntax |
| 2 (Data Constructor) | Language.PLSql.Syntax |
| User |
| 1 (Type/Class) | Language.PLSql.Syntax |
| 2 (Data Constructor) | Language.PLSql.Syntax |
| User_identification | Language.PLSql.Syntax |
| User_identification_c1 | Language.PLSql.Syntax |
| User_identification_c2 | Language.PLSql.Syntax |
| User_item | Language.PLSql.Syntax |
| User_item_c1 | Language.PLSql.Syntax |
| User_item_c2 | Language.PLSql.Syntax |
| User_item_c3 | Language.PLSql.Syntax |
| User_item_c4 | Language.PLSql.Syntax |
| User_item_c5 | Language.PLSql.Syntax |
| User_item_c6 | Language.PLSql.Syntax |
| User_items |
| 1 (Type/Class) | Language.PLSql.Syntax |
| 2 (Data Constructor) | Language.PLSql.Syntax |
| Using_index_clause |
| 1 (Type/Class) | Language.PLSql.Syntax |
| 2 (Data Constructor) | Language.PLSql.Syntax |
| Using_index_item | Language.PLSql.Syntax |
| Using_index_item_c1 | Language.PLSql.Syntax |
| Using_index_item_c2 | Language.PLSql.Syntax |
| Using_index_item_c3 | Language.PLSql.Syntax |
| Using_index_item_c4 | Language.PLSql.Syntax |
| Using_index_item_c5 | Language.PLSql.Syntax |
| Using_index_item_c6 | Language.PLSql.Syntax |
| u1 | Language.Sdf.Metrics.Halstead |
| u2 | Language.Sdf.Metrics.Halstead |
| unclassify | Language.Haskell.Literate |
| undistinguishable | Language.HaLex.Mini |
| undistl | Camila.Prelude, Pointless.Isomorphisms |
| undistr | Camila.Prelude, Pointless.Isomorphisms |
| unif | Data.Unification |
| unify | Data.Unification |
| unifyCompose | Language.VDM_SL.Optimize |
| unifyT | Data.TermLanguage, Data.TermLanguage.AutoTermLanguage |
| unifyVar | Data.Unification |
| union | Language.VDM_SL.AuxFuncLib |
| unionBag | Data.Bag |
| unionBags | Data.Bag |
| unionDfa | Language.HaLex.FaOperations, Language.Halex |
| unionFa | Language.HaLex.FaClasses, Language.Halex |
| unionNdfa | Language.HaLex.FaOperations, Language.Halex |
| unit | Data.Unification |
| unitS | Data.TermLanguage, Data.TermLanguage.AutoTermLanguage |
| uppJava | Language.Java.SyntaxPPInstances |
| uppSyntax | Language.Sdf.SdfLib, Language.Sdf.SyntaxPP |
| uppSyntaxCustom | Language.Sdf.Pretty, Language.Sdf.SdfLib |
| uppri | Language.Sdf.Metrics.Ambiguity |
| uvar | Language.Sdf.Metrics.Size |
