- All Known Subinterfaces:
- DOMImplementationCSS,- HTMLDOMImplementation
public interface DOMImplementation
The 
DOMImplementation interface provides a number of methods
 for performing operations that are independent of any particular instance
 of the document object model.
 See also the Document Object Model (DOM) Level 3 Core Specification.
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Method SummaryModifier and Type Method Description DocumentcreateDocument(String namespaceURI, String qualifiedName, DocumentType doctype)Creates a DOM Document object of the specified type with its document element.DocumentTypecreateDocumentType(String qualifiedName, String publicId, String systemId)Creates an emptyDocumentTypenode.ObjectgetFeature(String feature, String version)This method returns a specialized object which implements the specialized APIs of the specified feature and version, as specified in DOM Features.booleanhasFeature(String feature, String version)Test if the DOM implementation implements a specific feature and version, as specified in DOM Features.
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Method Details- 
hasFeatureTest if the DOM implementation implements a specific feature and version, as specified in DOM Features.- Parameters:
- feature- The name of the feature to test.
- version- This is the version number of the feature to test.
- Returns:
- trueif the feature is implemented in the specified version,- falseotherwise.
 
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createDocumentTypeDocumentType createDocumentType(String qualifiedName, String publicId, String systemId) throws DOMExceptionCreates an emptyDocumentTypenode. Entity declarations and notations are not made available. Entity reference expansions and default attribute additions do not occur..- Parameters:
- qualifiedName- The qualified name of the document type to be created.
- publicId- The external subset public identifier.
- systemId- The external subset system identifier.
- Returns:
- A new DocumentTypenode withNode.ownerDocumentset tonull.
- Throws:
- DOMException- INVALID_CHARACTER_ERR: Raised if the specified qualified name is not an XML name according to [XML 1.0].
 NAMESPACE_ERR: Raised if the- qualifiedNameis malformed.
 NOT_SUPPORTED_ERR: May be raised if the implementation does not support the feature "XML" and the language exposed through the Document does not support XML Namespaces (such as [HTML 4.01]).
- Since:
- 1.4, DOM Level 2
 
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createDocumentDocument createDocument(String namespaceURI, String qualifiedName, DocumentType doctype) throws DOMExceptionCreates a DOM Document object of the specified type with its document element.
 Note that based on theDocumentTypegiven to create the document, the implementation may instantiate specializedDocumentobjects that support additional features than the "Core", such as "HTML" [DOM Level 2 HTML] . On the other hand, setting theDocumentTypeafter the document was created makes this very unlikely to happen. Alternatively, specializedDocumentcreation methods, such ascreateHTMLDocument[DOM Level 2 HTML] , can be used to obtain specific types ofDocumentobjects.- Parameters:
- namespaceURI- The namespace URI of the document element to create or- null.
- qualifiedName- The qualified name of the document element to be created or- null.
- doctype- The type of document to be created or- null. When- doctypeis not- null, its- Node.ownerDocumentattribute is set to the document being created.
- Returns:
- A new Documentobject with its document element. If theNamespaceURI,qualifiedName, anddoctypearenull, the returnedDocumentis empty with no document element.
- Throws:
- DOMException- INVALID_CHARACTER_ERR: Raised if the specified qualified name is not an XML name according to [XML 1.0].
 NAMESPACE_ERR: Raised if the- qualifiedNameis malformed, if the- qualifiedNamehas a prefix and the- namespaceURIis- null, or if the- qualifiedNameis- nulland the- namespaceURIis different from- null, or if the- qualifiedNamehas a prefix that is "xml" and the- namespaceURIis different from " http://www.w3.org/XML/1998/namespace" [XML Namespaces] , or if the DOM implementation does not support the- "XML"feature but a non-null namespace URI was provided, since namespaces were defined by XML.
 WRONG_DOCUMENT_ERR: Raised if- doctypehas already been used with a different document or was created from a different implementation.
 NOT_SUPPORTED_ERR: May be raised if the implementation does not support the feature "XML" and the language exposed through the Document does not support XML Namespaces (such as [HTML 4.01]).
- Since:
- 1.4, DOM Level 2
 
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getFeatureThis method returns a specialized object which implements the specialized APIs of the specified feature and version, as specified in DOM Features. The specialized object may also be obtained by using binding-specific casting methods but is not necessarily expected to, as discussed in . This method also allow the implementation to provide specialized objects which do not support theDOMImplementationinterface.- Parameters:
- feature- The name of the feature requested. Note that any plus sign "+" prepended to the name of the feature will be ignored since it is not significant in the context of this method.
- version- This is the version number of the feature to test.
- Returns:
- Returns an object which implements the specialized APIs of
   the specified feature and version, if any, or nullif there is no object which implements interfaces associated with that feature. If theDOMObjectreturned by this method implements theDOMImplementationinterface, it must delegate to the primary coreDOMImplementationand not return results inconsistent with the primary coreDOMImplementationsuch ashasFeature,getFeature, etc.
- Since:
- 1.5, DOM Level 3
 
 
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