# DTD Node Kind Constants Constants that specify the kind and subkind of DTD declaration represented by an `NSXMLDTDNode` object. You set the DTD-node kind using the method. ## Topics ### Constants [`case general`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/general) Identifies a general entity declaration. [`case parsed`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/parsed) Identifies a parsed entity declaration. [`case unparsed`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/unparsed) Identifies an unparsed entity declaration. [`case parameter`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/parameter) Identifies a parameter entity declaration. [`case predefined`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/predefined) Identifies a predefined entity declaration. [`case cdataAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/cdataAttribute) Identifies an attribute-list declaration with a `CDATA` (character data) value type. [`case idAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/idAttribute) Identifies an attribute-list declaration with an `ID` value type (per-document unique element name). [`case idRefAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/idRefAttribute) Identifies an attribute-list declaration with an `IDREF` value type (refers to element `ID` type). [`case idRefsAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/idRefsAttribute) Identifies an attribute-list declaration with an `IDREFS` value type (refers to multiple elements of `ID` type). [`case entityAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/entityAttribute) Identifies an attribute-list declaration with an `ENTITY` value type (refers to unparsed entity declared in document). [`case entitiesAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/entitiesAttribute) Identifies an attribute-list declaration with an `ENTITIES` value type (refers to multiple unparsed entities declared elsewhere in document). [`case nmTokenAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/nmTokenAttribute) Identifies an attribute-list declaration with a `NMTOKEN` value type (name token). [`case nmTokensAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/nmTokensAttribute) Identifies an attribute-list declaration with a `NMTOKENS` value type (multiple name tokens) [`case enumerationAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/enumerationAttribute) Identifies an attribute-list declaration with an enumeration value type (list of all possible values). [`case notationAttribute`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/notationAttribute) Identifies an attribute-list declaration with a `NOTATION` value type (name of declared notation). [`case undefinedDeclaration`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/undefinedDeclaration) Identifies an undefined element declaration. [`case emptyDeclaration`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/emptyDeclaration) Identifies a declaration (`EMPTY`) of an empty element. [`case anyDeclaration`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/anyDeclaration) Identifies an `ANY` element declaration. [`case mixedDeclaration`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/mixedDeclaration) Identifies a declaration of an element with mixed content (`(#PCDATA | child)`). [`case elementDeclaration`](/documentation/Foundation/XMLDTDNode/DTDKind-swift.enum/elementDeclaration) Identifies a declaration of an element with child elements. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)