---
jsApi: true
title: "[T] Declaration"

---
```ts
Declaration: ModelStatementNode | ScalarStatementNode | InterfaceStatementNode | UnionStatementNode | NamespaceStatementNode | OperationStatementNode | TemplateParameterDeclarationNode | ProjectionStatementNode | ProjectionParameterDeclarationNode | ProjectionLambdaParameterDeclarationNode | EnumStatementNode | AliasStatementNode | DecoratorDeclarationStatementNode | FunctionDeclarationStatementNode
```
