Returns true when an attribute with a given localName and namespaceURI
is specified on this element or has a default value, false otherwise.
Per the XML Namespaces specification, applications must use the value null
as the namespaceURI parameter for methods if they wish to have no namespace.
Returns true when an attribute with a given localName and namespaceURI is specified on this element or has a default value, false otherwise. Per the XML Namespaces specification, applications must use the value null as the namespaceURI parameter for methods if they wish to have no namespace.