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Code Editor : DOM

$Id: DOM,v 1.3 1999/05/26 15:42:16 kmacleod Exp $

These are some notes relating XML::Grove to the core Document Object
Model <http://www.w3.org/DOM/> (REC-DOM-Level-1-19981001).  In theory
it should be relatively easy to create a strict DOM interface that
closely matches the DOM spec, I will keep such an interface in mind to
avoid conflicting designs.

On the left are DOM classes and methods and on the right are
equivalent XML::Grove classes, methods, and notes.  Equivalents marked
with an asterisk (*) are available with the XML::Grove extensions
Data::Grove::Parent, XML::Grove::Normalize, or
XML::Grove::GetElementsByTagName.

DOMImplementation                   No Equivalent
  boolean hasFeature(feature, version)

DocumentFragment                    Any XML::Grove object can be
                                    a document fragment.

Document                            XML::Grove::Document
  doctype                             not yet implemented
  implementation                      not yet implemented
  documentElement                     $grove->root  (*)
  createXXX                           XXX->new
  getElementsByTagName                $grove->get_elements_by_tag_name (*)

`Node' in DOM is a superclass of all other nodes in DOM, `XML::Grove'
is the superclass of all objects in the XML::Grove module.

Node                                XML::Grove
  nodeName                            $element->{Name}
  nodeValue                           $element->{Value}
  nodeType                            use `ref()' and pattern matching
                                      (match /.*::TYPE(::.*)?$/)
  parentNode                          $obj->{Parent}  (*)
  childNodes                          $obj->{Contents}
  firstChild                          $obj->{Contents}[0]
  lastChild                           $obj->{Contents}[-1]
  previousSibling                     no equivalent
  nextSibling                         no equivalent
  attributes                          $element->{Attributes}
  ownerDocument                       $obj->root->{Parent}  (*)
  insertBefore                        splice(@{$node->{Contents}},
                                        $index, 0, $new_child)
  replaceChild                        splice(@{$node->{Contents}},
                                        $index, 1, $new_child)
  removeChild                         splice(@{$node->{Contents}},
                                        $index, 1)

appendChild                         push(@{$node->{Contents}}, $new_child)
  hasChildNodes                       $#{$node->{Contents}} != -1
  cloneNode                           $new = $obj->clone()

NodeList                            NodeLists are Perl arrays

NamedNodeMap                        NamedNodeMap are Perl hashes

CharacterData
  data                                $characters->{Data}

Attr                                Attr are stored in Perl hashes,
                                    unspecified values are undef

Element                             XML::Grove::Element
  getAttribute                        $element->{Attributes}{$name}
  setAttribute                        $element->{Attributes}{$name} = $value
  removeAttribute                     undef $element{Attributes}{$name}
  getAttributeNode                    no equivalent
  setAttributeNode                    no equivalent
  removeAttributeNode                 delete $element{Attributes}{$name}
  getElementsByTagName                $elem->get_elements_by_tag_name (*)
  normalize                           $elem->normalize  (*)

Text
  data                                $characters->{Data}

Comment                             XML::Grove::Comment
  data                                $comment->{Data}

CDATASection                        XML::Grove::CData

DocumentType                        see XML::Grove::Document

Notation                            XML::Grove::Notation
  nodeName                            $notation->{Name}
  publicId                            $notation->{PublicId}
  systemId                            $notation->{SystemId}

Entity                              XML::Grove::ExtEntity
  nodeName                            $ext_entity->{Name}
  publicId                            $ext_entity->{PublicId}
  systemId                            $ext_entity->{SystemId}
  notationName                        $ext_entity->{Notation}{Name}

EntityReference                     XML::Grove::Entity
  nodeName                            $entity->{Name}
  nodeValue                           $entity->{Data}

ProcessingInstruction               XML::Grove::PI
  target                              $pi->{Target}
  data                                $pi->{Data}

${this.title}

Code Editor : DOM