XML DOM - 的文档对象

Document 对象代表整个 XML 文档。

XML 文档对象

Document 对象是 XML 文档树的根，它为我们提供了对文档数据的主要访问权限。

由于元素节点、文本节点、注释、处理指令等不能存在于文档之外，因此Document对象还包含创建这些对象的方法。 Node 对象有一个ownerDocument 属性，该属性将它们与创建它们的Document 关联起来。

Property	Description
childNodes	Returns a NodeList of child nodes for the document
doctype	Returns the Document Type Declaration associated with the document
documentElement	Returns the root node of the document
documentURI	Sets or returns the location of the document
domConfig	Returns the configuration used when normalizeDocument() is invoked
firstChild	Returns the first child node of the document
implementation	Returns the DOMImplementation object that handles this document
inputEncoding	Returns the encoding used for the document (when parsing)
lastChild	Returns the last child node of the document
nodeName	Returns the name of a node (depending on its type)
nodeType	Returns the node type of a node
nodeValue	Sets or returns the value of a node (depending on its type)
xmlEncoding	Returns the XML encoding of the document
xmlStandalone	Sets or returns whether the document is standalone
xmlVersion	Sets or returns the XML version of the document

Method	Description
adoptNode(sourcenode)	Adopts a node from another document to this document, and returns the adopted node
createAttribute(name)	Creates an attribute node with the specified name, and returns the new Attr object
createAttributeNS(uri,name)	Creates an attribute node with the specified name and namespace, and returns the new Attr object
createCDATASection()	Creates a CDATA section node
createComment()	Creates a comment node
createDocumentFragment()	Creates an empty DocumentFragment object, and returns it
createElement()	Creates an element node
createElementNS()	Creates an element node with a specified namespace
createEntityReference(name)	Creates an EntityReference object, and returns it
createProcessingInstruction(target,data)	Creates a ProcessingInstruction object, and returns it
createTextNode()	Creates a text node
getElementById(id)	Returns the element that has an ID attribute with the given value. If no such element exists, it returns null
getElementsByTagName()	Returns a NodeList of all elements with a specified name
getElementsByTagNameNS()	Returns a NodeList of all elements with a specified name and namespace
importNode(nodetoimport,deep)	Imports a node from another document to this document. This method creates a new copy of the source node. If the deep parameter is set to true, it imports all children of the specified node. If set to false, it imports only the node itself. This method returns the imported node
normalizeDocument()
renameNode()	Renames an element or attribute node

每个文档都有一个 DOCTYPE 属性，其值为 null 或 DocumentType 对象。

DocumentType 对象提供了为 XML 文档定义的实体的接口。

Property	Description
name	Returns the name of the DTD
publicId	Returns the public identifier of the DTD
systemId	Returns the system identifier of the external DTD

DOMImplementation 对象执行独立于文档对象模型的任何特定实例的操作。

Method	Description
createDocument(nsURI, name, doctype)	Creates a new DOM Document object of the specified doctype
createDocumentType(name, pubId, systemId)	Creates an empty DocumentType node
getFeature(feature, version)	Returns an object which implements the APIs of the specified feature and version, if the is any
hasFeature(feature, version)	Checks whether the DOM implementation implements a specific feature and version

ProcessingInstruction 对象表示一条处理指令。

处理指令用作将处理器特定信息保留在 XML 文档文本中的方法。

Property	Description
data	Sets or returns the content of this processing instruction
target	Returns the target of this processing instruction