Document JDK 1.6)

public Node adoptNode (Node source) throws DOMException

Attempts to adopt a node from another document to this document.

Attempts to adopt a node from another document to this document. If
supported, it changes the ownerDocument of the source
node, its children, as well as the attached attribute nodes if there
are any. If the source node has a parent it is first removed from the
child list of its parent. This effectively allows moving a subtree
from one document to another (unlike importNode() which
create a copy of the source node instead of moving it). When it
fails, applications should use Document.importNode()
instead. Note that if the adopted node is already part of this
document (i.e. the source and target document are the same), this
method still has the effect of removing the source node from the
child list of its parent, if any. The following list describes the
specifics for each type of node.

ATTRIBUTE_NODE: The
ownerElement attribute is set to null and
the specified flag is set to true on the
adopted Attr. The descendants of the source
Attr are recursively adopted.
DOCUMENT_FRAGMENT_NODE: The
descendants of the source node are recursively adopted.
DOCUMENT_NODE: Document nodes cannot be adopted.
DOCUMENT_TYPE_NODE: DocumentType nodes cannot be adopted.
ELEMENT_NODE: Specified attribute nodes of the source element are adopted. Default attributes
are discarded, though if the document being adopted into defines
default attributes for this element name, those are assigned. The
descendants of the source element are recursively adopted.
ENTITY_NODE: Entity nodes cannot be adopted.
ENTITY_REFERENCE_NODE: Only
the EntityReference node itself is adopted, the
descendants are discarded, since the source and destination documents
might have defined the entity differently. If the document being
imported into provides a definition for this entity name, its value
is assigned.
NOTATION_NODE: Notation nodes cannot be
adopted.
PROCESSING_INSTRUCTION_NODE, TEXT_NODE, CDATA_SECTION_NODE, COMMENT_NODE: These nodes can all be adopted. No specifics.

Note: Since it does not create new nodes unlike the
Document.importNode() method, this method does not raise
an INVALID_CHARACTER_ERR exception, and applications
should use the Document.normalizeDocument() method to
check if an imported name is not an XML name according to the XML
version in use.
Returns: The adopted node, or null if this operation fails, such as when the source node comes from a different implementation.
Parameters:
- source - The node to move into this document.
Throws:
- DOMException - NOT_SUPPORTED_ERR: Raised if the source node is of type DOCUMENT, DOCUMENT_TYPE.
NO_MODIFICATION_ALLOWED_ERR: Raised when the source node is readonly.
Since: DOM Level 3

public Attr createAttribute (String name) throws DOMException

Creates an Attr of the given name.

Creates an Attr of the given name. Note that the
Attr instance can then be set on an Element
using the setAttributeNode method.

To create an attribute with a qualified name and namespace URI, use
the createAttributeNS method.
Returns: A new Attr object with the nodeName attribute set to name, and localName, prefix, and namespaceURI set to null. The value of the attribute is the empty string.
Parameters:
- name - The name of the attribute.
Throws:
- DOMException - INVALID_CHARACTER_ERR: Raised if the specified name is not an XML name according to the XML version in use specified in the Document.xmlVersion attribute.

public Attr createAttributeNS (String namespaceURI, String qualifiedName) throws DOMException

Creates an attribute of the given qualified name and namespace URI.

Creates an attribute of the given qualified name and namespace URI.

Per [XML Namespaces]
, applications must use the value null as the
namespaceURI parameter for methods if they wish to have
no namespace.
Returns: A new Attr object with the following attributes:

Attribute	Value
`Node.nodeName`	qualifiedName
`Node.namespaceURI`	`namespaceURI`
`Node.prefix`	prefix, extracted from `qualifiedName`, or `null` if there is no prefix
`Node.localName`	local name, extracted from `qualifiedName`
`Attr.name`	`qualifiedName`
`Node.nodeValue`	the empty string

Parameters:
- namespaceURI - The namespace URI of the attribute to create.
- qualifiedName - The qualified name of the attribute to instantiate.
Throws:
- DOMException - INVALID_CHARACTER_ERR: Raised if the specified qualifiedName is not an XML name according to the XML version in use specified in the Document.xmlVersion attribute.
NAMESPACE_ERR: Raised if the qualifiedName is a malformed qualified name, if the qualifiedName has a prefix and the namespaceURI is null, if the qualifiedName has a prefix that is "xml" and the namespaceURI is different from " http://www.w3.org/XML/1998/namespace", if the qualifiedName or its prefix is "xmlns" and the namespaceURI is different from "http://www.w3.org/2000/xmlns/", or if the namespaceURI is "http://www.w3.org/2000/xmlns/" and neither the qualifiedName nor its prefix is "xmlns".
NOT_SUPPORTED_ERR: Always thrown if the current document does not support the "XML" feature, since namespaces were defined by XML.
Since: DOM Level 2

public CDATASection createCDATASection (String data) throws DOMException

Creates a CDATASection node whose value is the specified string.

Creates a CDATASection node whose value is the specified
string.
Returns: The new CDATASection object.
Parameters:
- data - The data for the CDATASection contents.
Throws:
- DOMException - NOT_SUPPORTED_ERR: Raised if this document is an HTML document.

public Comment createComment (String data)

Creates a Comment node given the specified string.

Creates a Comment node given the specified string.
Returns: The new Comment object.
Parameters:
- data - The data for the node.

public DocumentFragment createDocumentFragment ()

Creates an empty DocumentFragment object.

Creates an empty DocumentFragment object.
Returns: A new DocumentFragment.

public Element createElement (String tagName) throws DOMException

Creates an element of the type specified.

Creates an element of the type specified. Note that the instance
returned implements the Element interface, so attributes
can be specified directly on the returned object.

In addition, if there are known attributes with default values,
Attr nodes representing them are automatically created
and attached to the element.

To create an element with a qualified name and namespace URI, use
the createElementNS method.
Returns: A new Element object with the nodeName attribute set to tagName, and localName, prefix, and namespaceURI set to null.
Parameters:
- tagName - The name of the element type to instantiate. For XML, this is case-sensitive, otherwise it depends on the case-sensitivity of the markup language in use. In that case, the name is mapped to the canonical form of that markup by the DOM implementation.
Throws:
- DOMException - INVALID_CHARACTER_ERR: Raised if the specified name is not an XML name according to the XML version in use specified in the Document.xmlVersion attribute.

public Element createElementNS (String namespaceURI, String qualifiedName) throws DOMException

Creates an element of the given qualified name and namespace URI.

Creates an element of the given qualified name and namespace URI.

Per [XML Namespaces]
, applications must use the value null as the
namespaceURI parameter for methods if they wish to have no namespace.
Returns: A new Element object with the following attributes:

Attribute	Value
`Node.nodeName`	`qualifiedName`
`Node.namespaceURI`	`namespaceURI`
`Node.prefix`	prefix, extracted from `qualifiedName`, or `null` if there is no prefix
`Node.localName`	local name, extracted from `qualifiedName`
`Element.tagName`	`qualifiedName`

Parameters:
- namespaceURI - The namespace URI of the element to create.
- qualifiedName - The qualified name of the element type to instantiate.
Throws:
- DOMException - INVALID_CHARACTER_ERR: Raised if the specified qualifiedName is not an XML name according to the XML version in use specified in the Document.xmlVersion attribute.
NAMESPACE_ERR: Raised if the qualifiedName is a malformed qualified name, if the qualifiedName has a prefix and the namespaceURI is null, or if the qualifiedName has a prefix that is "xml" and the namespaceURI is different from " http://www.w3.org/XML/1998/namespace" [XML Namespaces] , or if the qualifiedName or its prefix is "xmlns" and the namespaceURI is different from "http://www.w3.org/2000/xmlns/", or if the namespaceURI is "http://www.w3.org/2000/xmlns/" and neither the qualifiedName nor its prefix is "xmlns".
NOT_SUPPORTED_ERR: Always thrown if the current document does not support the "XML" feature, since namespaces were defined by XML.
Since: DOM Level 2

public EntityReference createEntityReference (String name) throws DOMException

Creates an EntityReference object.

Creates an EntityReference object. In addition, if the
referenced entity is known, the child list of the
EntityReference node is made the same as that of the
corresponding Entity node.

Note: If any descendant of the Entity node has
an unbound namespace prefix, the corresponding descendant of the
created EntityReference node is also unbound; (its
namespaceURI is null). The DOM Level 2 and
3 do not support any mechanism to resolve namespace prefixes in this
case.
Returns: The new EntityReference object.
Parameters:
- name - The name of the entity to reference.Unlike Document.createElementNS or Document.createAttributeNS, no namespace well-formed checking is done on the entity name. Applications should invoke Document.normalizeDocument() with the parameter " namespaces" set to true in order to ensure that the entity name is namespace well-formed.
Throws:
- DOMException - INVALID_CHARACTER_ERR: Raised if the specified name is not an XML name according to the XML version in use specified in the Document.xmlVersion attribute.
NOT_SUPPORTED_ERR: Raised if this document is an HTML document.

public ProcessingInstruction createProcessingInstruction (String target, String data) throws DOMException

Creates a ProcessingInstruction node given the specified name and data strings.

Creates a ProcessingInstruction node given the specified
name and data strings.
Returns: The new ProcessingInstruction object.
Parameters:
- target - The target part of the processing instruction.Unlike Document.createElementNS or Document.createAttributeNS, no namespace well-formed checking is done on the target name. Applications should invoke Document.normalizeDocument() with the parameter " namespaces" set to true in order to ensure that the target name is namespace well-formed.
- data - The data for the node.
Throws:
- DOMException - INVALID_CHARACTER_ERR: Raised if the specified target is not an XML name according to the XML version in use specified in the Document.xmlVersion attribute.
NOT_SUPPORTED_ERR: Raised if this document is an HTML document.

public Text createTextNode (String data)

Creates a Text node given the specified string.

Creates a Text node given the specified string.
Returns: The new Text object.
Parameters:
- data - The data for the node.

public DocumentType getDoctype ()

The Document Type Declaration (see DocumentType) associated with this document.

The Document Type Declaration (see DocumentType)
associated with this document. For XML documents without a document
type declaration this returns null. For HTML documents,
a DocumentType object may be returned, independently of
the presence or absence of document type declaration in the HTML
document.

This provides direct access to the DocumentType node,
child node of this Document. This node can be set at
document creation time and later changed through the use of child
nodes manipulation methods, such as Node.insertBefore,
or Node.replaceChild. Note, however, that while some
implementations may instantiate different types of
Document objects supporting additional features than the
"Core", such as "HTML" [DOM Level 2 HTML]
, based on the DocumentType specified at creation time,
changing it afterwards is very unlikely to result in a change of the
features supported.
Since: DOM Level 3

public Element getDocumentElement ()

This is a convenience attribute that allows direct access to the child node that is the document element of the document.

public String getDocumentURI ()

The location of the document or null if undefined or if the Document was created using DOMImplementation.createDocument.

The location of the document or null if undefined or if
the Document was created using
DOMImplementation.createDocument. No lexical checking is
performed when setting this attribute; this could result in a
null value returned when using Node.baseURI
.

Beware that when the Document supports the feature
"HTML" [DOM Level 2 HTML]
, the href attribute of the HTML BASE element takes precedence over
this attribute when computing Node.baseURI.
Since: DOM Level 3

public DOMConfiguration getDomConfig ()

The configuration used when Document.normalizeDocument() is invoked.

The configuration used when Document.normalizeDocument()
is invoked.
Since: DOM Level 3

public Element getElementById (String elementId)

Returns the Element that has an ID attribute with the given value.

Returns the Element that has an ID attribute with the
given value. If no such element exists, this returns null
. If more than one element has an ID attribute with that value, what
is returned is undefined.

The DOM implementation is expected to use the attribute
Attr.isId to determine if an attribute is of type ID.

Note: Attributes with the name "ID" or "id" are not of type
ID unless so defined.
Returns: The matching element or null if there is none.
Parameters:
- elementId - The unique id value for an element.
Since: DOM Level 2

public NodeList getElementsByTagName (String tagname)

Returns a NodeList of all the Elements in document order with a given tag name and are contained in the document.

Returns a NodeList of all the Elements in
document order with a given tag name and are contained in the
document.
Returns: A new NodeList object containing all the matched Elements.
Parameters:
- tagname - The name of the tag to match on. The special value "*" matches all tags. For XML, the tagname parameter is case-sensitive, otherwise it depends on the case-sensitivity of the markup language in use.

public NodeList getElementsByTagNameNS (String namespaceURI, String localName)

Returns a NodeList of all the Elements with a given local name and namespace URI in document order.

Returns a NodeList of all the Elements with a
given local name and namespace URI in document order.
Returns: A new NodeList object containing all the matched Elements.
Parameters:
- namespaceURI - The namespace URI of the elements to match on. The special value "*" matches all namespaces.
- localName - The local name of the elements to match on. The special value "*" matches all local names.
Since: DOM Level 2

public DOMImplementation getImplementation ()

The DOMImplementation object that handles this document.

The DOMImplementation object that handles this document. A
DOM application may use objects from multiple implementations.

public String getInputEncoding ()

An attribute specifying the encoding used for this document at the time of the parsing.

An attribute specifying the encoding used for this document at the time
of the parsing. This is null when it is not known, such
as when the Document was created in memory.
Since: DOM Level 3

public boolean getStrictErrorChecking ()

An attribute specifying whether error checking is enforced or not.

An attribute specifying whether error checking is enforced or not. When
set to false, the implementation is free to not test
every possible error case normally defined on DOM operations, and not
raise any DOMException on DOM operations or report
errors while using Document.normalizeDocument(). In case
of error, the behavior is undefined. This attribute is
true by default.
Since: DOM Level 3

public String getXmlEncoding ()

An attribute specifying, as part of the XML declaration, the encoding of this document.

An attribute specifying, as part of the XML declaration, the encoding of this document. This is null when
unspecified or when it is not known, such as when the
Document was created in memory.
Since: DOM Level 3

public boolean getXmlStandalone ()

An attribute specifying, as part of the XML declaration, whether this document is standalone.

An attribute specifying, as part of the XML declaration, whether this document is standalone. This is false when
unspecified.

Note: No verification is done on the value when setting
this attribute. Applications should use
Document.normalizeDocument() with the "validate"
parameter to verify if the value matches the validity
constraint for standalone document declaration as defined in [XML 1.0].
Since: DOM Level 3

public String getXmlVersion ()

An attribute specifying, as part of the XML declaration, the version number of this document.

An attribute specifying, as part of the XML declaration, the version number of this document. If there is no declaration and if
this document supports the "XML" feature, the value is
"1.0". If this document does not support the "XML"
feature, the value is always null. Changing this
attribute will affect methods that check for invalid characters in
XML names. Application should invoke
Document.normalizeDocument() in order to check for
invalid characters in the Nodes that are already part of
this Document.

DOM applications may use the
DOMImplementation.hasFeature(feature, version) method
with parameter values "XMLVersion" and "1.0" (respectively) to
determine if an implementation supports [XML 1.0]. DOM
applications may use the same method with parameter values
"XMLVersion" and "1.1" (respectively) to determine if an
implementation supports [XML 1.1]. In both
cases, in order to support XML, an implementation must also support
the "XML" feature defined in this specification. Document
objects supporting a version of the "XMLVersion" feature must not
raise a NOT_SUPPORTED_ERR exception for the same version
number when using Document.xmlVersion.
Since: DOM Level 3

public Node importNode (Node importedNode, boolean deep) throws DOMException

Imports a node from another document to this document, without altering or removing the source node from the original document; this method creates a new copy of the source node.

Imports a node from another document to this document, without altering
or removing the source node from the original document; this method
creates a new copy of the source node. The returned node has no
parent; (parentNode is null).

For all nodes, importing a node creates a node object owned by the
importing document, with attribute values identical to the source
node's nodeName and nodeType, plus the
attributes related to namespaces (prefix,
localName, and namespaceURI). As in the
cloneNode operation, the source node is not altered.
User data associated to the imported node is not carried over.
However, if any UserDataHandlers has been specified
along with the associated data these handlers will be called with the
appropriate parameters before this method returns.

Additional information is copied as appropriate to the
nodeType, attempting to mirror the behavior expected if
a fragment of XML or HTML source was copied from one document to
another, recognizing that the two documents may have different DTDs
in the XML case. The following list describes the specifics for each
type of node.

ATTRIBUTE_NODE: The ownerElement attribute
is set to null and the specified flag is
set to true on the generated Attr. The
descendants of the source Attr are recursively imported
and the resulting nodes reassembled to form the corresponding subtree.
Note that the deep parameter has no effect on
Attr nodes; they always carry their children with them
when imported.
DOCUMENT_FRAGMENT_NODE: If the deep option
was set to true, the descendants of the source
DocumentFragment are recursively imported and the
resulting nodes reassembled under the imported
DocumentFragment to form the corresponding subtree.
Otherwise, this simply generates an empty
DocumentFragment.
DOCUMENT_NODE: Document
nodes cannot be imported.
DOCUMENT_TYPE_NODE: DocumentType
nodes cannot be imported.
ELEMENT_NODE: Specified attribute nodes of the source element are imported, and the generated
Attr nodes are attached to the generated
Element. Default attributes are not copied, though if the document being imported into defines default
attributes for this element name, those are assigned. If the
importNode deep parameter was set to
true, the descendants of the source element are
recursively imported and the resulting nodes reassembled to form the
corresponding subtree.
ENTITY_NODE: Entity nodes can be
imported, however in the current release of the DOM the
DocumentType is readonly. Ability to add these imported
nodes to a DocumentType will be considered for addition
to a future release of the DOM.On import, the publicId,
systemId, and notationName attributes are
copied. If a deep import is requested, the descendants
of the the source Entity are recursively imported and
the resulting nodes reassembled to form the corresponding subtree.
ENTITY_REFERENCE_NODE: Only the EntityReference itself is
copied, even if a deep import is requested, since the
source and destination documents might have defined the entity
differently. If the document being imported into provides a
definition for this entity name, its value is assigned.
NOTATION_NODE: Notation nodes can be imported, however in the current
release of the DOM the DocumentType is readonly. Ability
to add these imported nodes to a DocumentType will be
considered for addition to a future release of the DOM.On import, the
publicId and systemId attributes are copied.
Note that the deep parameter has no effect on this type
of nodes since they cannot have any children.
PROCESSING_INSTRUCTION_NODE: The imported node copies its
target and data values from those of the
source node.Note that the deep parameter has no effect
on this type of nodes since they cannot have any children.
TEXT_NODE, CDATA_SECTION_NODE, COMMENT_NODE: These three types of nodes inheriting
from CharacterData copy their data and
length attributes from those of the source node.Note
that the deep parameter has no effect on these types of
nodes since they cannot have any children.

Returns: The imported node that belongs to this Document.
Parameters:
- importedNode - The node to import.
- deep - If true, recursively import the subtree under the specified node; if false, import only the node itself, as explained above. This has no effect on nodes that cannot have any children, and on Attr, and EntityReference nodes.
Throws:
- DOMException - NOT_SUPPORTED_ERR: Raised if the type of node being imported is not supported.
INVALID_CHARACTER_ERR: Raised if one of the imported names is not an XML name according to the XML version in use specified in the Document.xmlVersion attribute. This may happen when importing an XML 1.1 [XML 1.1] element into an XML 1.0 document, for instance.
Since: DOM Level 2

public void normalizeDocument ()

This method acts as if the document was going through a save and load cycle, putting the document in a "normal" form.

This method acts as if the document was going through a save and load
cycle, putting the document in a "normal" form. As a consequence,
this method updates the replacement tree of
EntityReference nodes and normalizes Text
nodes, as defined in the method Node.normalize().

Otherwise, the actual result depends on the features being set on
the Document.domConfig object and governing what
operations actually take place. Noticeably this method could also
make the document namespace well-formed according to the algorithm
described in , check the character normalization, remove the
CDATASection nodes, etc. See
DOMConfiguration for details.

// Keep in the document 
 the information defined // in the XML Information Set (Java example) 
 DOMConfiguration docConfig = myDocument.getDomConfig(); 
 docConfig.setParameter("infoset", Boolean.TRUE); 
 myDocument.normalizeDocument();

Mutation events, when supported, are generated to reflect the
changes occurring on the document.

If errors occur during the invocation of this method, such as an
attempt to update a read-only node or a Node.nodeName
contains an invalid character according to the XML version in use,
errors or warnings (DOMError.SEVERITY_ERROR or
DOMError.SEVERITY_WARNING) will be reported using the
DOMErrorHandler object associated with the "error-handler
" parameter. Note this method might also report fatal errors (
DOMError.SEVERITY_FATAL_ERROR) if an implementation
cannot recover from an error.
Since: DOM Level 3

public Node renameNode (Node n, String namespaceURI, String qualifiedName) throws DOMException

Rename an existing node of type ELEMENT_NODE or ATTRIBUTE_NODE.

Rename an existing node of type ELEMENT_NODE or
ATTRIBUTE_NODE.

When possible this simply changes the name of the given node,
otherwise this creates a new node with the specified name and
replaces the existing node with the new node as described below.

If simply changing the name of the given node is not possible, the
following operations are performed: a new node is created, any
registered event listener is registered on the new node, any user
data attached to the old node is removed from that node, the old node
is removed from its parent if it has one, the children are moved to
the new node, if the renamed node is an Element its
attributes are moved to the new node, the new node is inserted at the
position the old node used to have in its parent's child nodes list
if it has one, the user data that was attached to the old node is
attached to the new node.

When the node being renamed is an Element only the
specified attributes are moved, default attributes originated from
the DTD are updated according to the new element name. In addition,
the implementation may update default attributes from other schemas.
Applications should use Document.normalizeDocument() to
guarantee these attributes are up-to-date.

When the node being renamed is an Attr that is
attached to an Element, the node is first removed from
the Element attributes map. Then, once renamed, either
by modifying the existing node or creating a new one as described
above, it is put back.

In addition,

a user data event NODE_RENAMED is fired,

when the implementation supports the feature "MutationNameEvents",
each mutation operation involved in this method fires the appropriate
event, and in the end the event {
http://www.w3.org/2001/xml-events,
DOMElementNameChanged} or {
http://www.w3.org/2001/xml-events,
DOMAttributeNameChanged} is fired.

Returns: The renamed node. This is either the specified node or the new node that was created to replace the specified node.
Parameters:
- n - The node to rename.
- namespaceURI - The new namespace URI.
- qualifiedName - The new qualified name.
Throws:
- DOMException - NOT_SUPPORTED_ERR: Raised when the type of the specified node is neither ELEMENT_NODE nor ATTRIBUTE_NODE, or if the implementation does not support the renaming of the document element.
INVALID_CHARACTER_ERR: Raised if the new qualified name is not an XML name according to the XML version in use specified in the Document.xmlVersion attribute.
WRONG_DOCUMENT_ERR: Raised when the specified node was created from a different document than this document.
NAMESPACE_ERR: Raised if the qualifiedName is a malformed qualified name, if the qualifiedName has a prefix and the namespaceURI is null, or if the qualifiedName has a prefix that is "xml" and the namespaceURI is different from " http://www.w3.org/XML/1998/namespace" [XML Namespaces] . Also raised, when the node being renamed is an attribute, if the qualifiedName, or its prefix, is "xmlns" and the namespaceURI is different from "http://www.w3.org/2000/xmlns/".
Since: DOM Level 3

public void setDocumentURI (String documentURI)

The location of the document or null if undefined or if the Document was created using DOMImplementation.createDocument.

The location of the document or null if undefined or if
the Document was created using
DOMImplementation.createDocument. No lexical checking is
performed when setting this attribute; this could result in a
null value returned when using Node.baseURI
.

Beware that when the Document supports the feature
"HTML" [DOM Level 2 HTML]
, the href attribute of the HTML BASE element takes precedence over
this attribute when computing Node.baseURI.
Since: DOM Level 3

public void setStrictErrorChecking (boolean strictErrorChecking)

An attribute specifying whether error checking is enforced or not.

An attribute specifying whether error checking is enforced or not. When
set to false, the implementation is free to not test
every possible error case normally defined on DOM operations, and not
raise any DOMException on DOM operations or report
errors while using Document.normalizeDocument(). In case
of error, the behavior is undefined. This attribute is
true by default.
Since: DOM Level 3

public void setXmlStandalone (boolean xmlStandalone) throws DOMException

An attribute specifying, as part of the XML declaration, whether this document is standalone.

An attribute specifying, as part of the XML declaration, whether this document is standalone. This is false when
unspecified.

Note: No verification is done on the value when setting
this attribute. Applications should use
Document.normalizeDocument() with the "validate"
parameter to verify if the value matches the validity
constraint for standalone document declaration as defined in [XML 1.0].
Throws:
- DOMException - NOT_SUPPORTED_ERR: Raised if this document does not support the "XML" feature.
Since: DOM Level 3

public void setXmlVersion (String xmlVersion) throws DOMException

An attribute specifying, as part of the XML declaration, the version number of this document.

An attribute specifying, as part of the XML declaration, the version number of this document. If there is no declaration and if
this document supports the "XML" feature, the value is
"1.0". If this document does not support the "XML"
feature, the value is always null. Changing this
attribute will affect methods that check for invalid characters in
XML names. Application should invoke
Document.normalizeDocument() in order to check for
invalid characters in the Nodes that are already part of
this Document.

DOM applications may use the
DOMImplementation.hasFeature(feature, version) method
with parameter values "XMLVersion" and "1.0" (respectively) to
determine if an implementation supports [XML 1.0]. DOM
applications may use the same method with parameter values
"XMLVersion" and "1.1" (respectively) to determine if an
implementation supports [XML 1.1]. In both
cases, in order to support XML, an implementation must also support
the "XML" feature defined in this specification. Document
objects supporting a version of the "XMLVersion" feature must not
raise a NOT_SUPPORTED_ERR exception for the same version
number when using Document.xmlVersion.
Throws:
- DOMException - NOT_SUPPORTED_ERR: Raised if the version is set to a value that is not supported by this Document or if this document does not support the "XML" feature.
Since: DOM Level 3