XML DOM: el objeto del documento
El objeto Document representa todo el documento XML.
El objeto de documento XML
El objeto Documento es la raíz de un árbol de documentos XML y nos brinda el acceso principal a los datos del documento.
Dado que los nodos de elementos, nodos de texto, comentarios, instrucciones de procesamiento, etc. no pueden existir fuera del documento, el objeto Documento también contiene métodos para crear estos objetos. Los objetos Nodo tienen una propiedad OwnerDocument que los asocia con el Documento donde fueron creados.
Propiedades del objeto de documento
| 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 |
Métodos de objeto de documento
| 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 |
Propiedades del objeto DocumentType
Cada documento tiene un atributo DOCTYPE cuyo valor es nulo o un objeto DocumentType.
El objeto DocumentType proporciona una interfaz para las entidades definidas para un documento XML.
| 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 |
Métodos de objetos de implementación de documentos
El objeto DOMImplementation realiza operaciones que son independientes de cualquier instancia particular del modelo de objeto de documento.
| 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 |
Propiedades del objeto ProcessingInstruction
El objeto ProcessingInstruction representa una instrucción de procesamiento.
Una instrucción de procesamiento se usa como una forma de mantener información específica del procesador en el texto del documento XML.
| Property | Description |
|---|---|
| data | Sets or returns the content of this processing instruction |
| target | Returns the target of this processing instruction |