Here is the list for the equivalence between the DOM Tree and DocBook

DocBook - DOM

WIP

WIP

A

• Abbrev	Inline element
  Abstract	Inline element
  Accel	Inline element
  Acknowledgments	<div html:class="db-acknowledgments">
  Acronym	Inline element
  Address	Inline element
  Affiliation	No equivalence
  Alt	Inline element
  Anchor	Inline element
  Answer	<list-item-label>A:</><list-item-body>
  Appendix	<div html:class="db-appendix">
  Application	Inline element
  arc	We do not support XLink arc
  Area	Callout element
  AreaSet	Callout element
  AreaSpec	Callout element
  Arg	Callout element
  ArtPageNums	Info element	See the section about info elements
  Article	<page>
  Attribution	source attrib of blockquote	See blockquote
  AudioData	<object type="audio/">
  AudioObject	See *Object conversion.
  Author	Info element	See the section about info elements
  AuthorGroup	Info element	See the section about info elements
  AuthorInitials	Info element	See the section about info elements

B

• Biblio*	Biblio element	See the section about bibliography.
  BlockQuote	No equivalence
  Book	<div html:class="db-appendix">
  BridgeHead	No equivalence	Too complicate

C

• Callout	No equivalence	Callout is too complex to be handle currently by the converter
  CalloutList	No equivalence	See callout
  Caption	<div html:class="db-caption">
  Caution	<admonition type='caution'>
  Chapter	<div html:class="db-chapter">
  Citation	bibliography
  CiteRefEntry	bibliography
  CiteTitle	bibliography
  City	Inline element
  Class*	Class information
  CmdSynopsis	<div html:class="db-cmdsynopsis">
  co	No equivalence	See callout
  code	<code>
  Col	Save the attr to apply it to the col	See HTML tables
  ColGroup	Idem to col but for several cols	See HTML tables
  Collab	Info element	See the section about info elements
  Colophon	<div html:class="db-colophon">
  ColSpec	Idem to col for db.cals.table	See HTML tables
  Command	Inline element
  ComputerOutput	<code>
  Conf*	Info element	See the section about info elements
  Constant	Inline element
  Constraint*	EBNF element	EBNF elements not supported
  ConstructorSynopsis	Class information	Class information not supported
  ContractNum	Info element	See the section about info elements
  ContractSponsor	Info element	See the section about info elements
  Contrib	Info element	See the section about info elements
  Copyright	Info element	See the section about info elements
  Country	Inline element
  CoRef	No equivalence	See callout
  Cover	Info element	See the section about info elements

D

• Database	Inline element
  Date	Inline element
  Dedication	<div html:class="db-dedication">	Maybe italic ?
  DestructorSynopsis	Class information	Class information not supported

E

• Edition	Info element	See the section about info elements
  Editor	Info element	See the section about info elements
  Email	Use the corresponding macro.
  Emphasis	<emphasis></emphasis>
  Entry	<table-cell></table-cell>
  EntryTbl	<table-cell><table>
  Epigraph	<div html:class="db-epigraph">
  Equation	<div html:class="db-equation">
  Error*	Inline element
  Example	<div html:class="db-example">
  ExceptionName	Inline element
  extendedlink	Info element	See the section about info elements

F

• Fax	Inline element
  FieldSynopsis	Class information	Class information not supported
  Figure	<div html:class="db-figure">
  Filename	Inline element
  FirstName	Inline element
  FirstTerm	Inline element
  Footnote	<note note-class="footnote">
  FootnoteRef	Not yet supported
  ForeignPhrase	Inline element
  FormalPara	<hX>Title</hX><p>Text</p>
  Func*	Class information	Class information not supported
  Function	Class information	Class information not supported

G

• Gui*	GUI information	Gui information not supported
  Glosslist	<list>
  Glossentry	<list-item>
  Glossterm	<list-item-label>
  Glossdef	<list-item-body>
  Group	Class information	Class information not supported

H

• Hardware	Inline element
  Holder	Inline element
  Honorific	Inline element

I

• ImageData	<object>
  ImageObject	See *Object conversion
  ImageObjectCO	Callout is not supported.
  Important	<admonition type='important>
  Index*	Index Element	Index are not supported.
  Info	Info element	See the section about info elements
  InformalEquation	<div html:class="db-equation">	it is not using the element name
  InformalFigure	<div html:class="db-figure">	it is not using the element name
  InformalTable	See Table
  Initializer	Class information	Class information not supported
  InlineEquation	See Equation
  InlineMediaObject	See *Object conversion
  InterfaceName	Class information	Class information not supported
  IssueNum	Info element	See the section about info elements
  ItemizedList	<list item-label-generate='unordered'>
  Itermset	Info element	See the section about info elements

J - K

• JobTitle	Inline element
  KeyCap	Inline element
  KeyCode	Inline element
  KeyCombo	Inline element
  KeySym	Inline element
  Keyword	Info element	See the section about info elements
  KeywordSet	Info element	See the section about info elements

L

• LegalNotice	Info element	See the section about info elements
  lhs	EBNF element	See the section about ignored tags
  lineage	Inline element
  LineAnnotation	Inline element
  Link	<a href>
  ListItem	<list><list-item>
  Literal	<code>
  LiteralLayout	<blockcode html:class="db-literallayout">	Our converter miss currently <pre> element, this is why we use <blockcode> element.

M

• ManVolNum	Inline element
  Markup	<code>
  MathPhrase	Inline element
  MediaObject	<object>
  Member	<list-item>
  MenuChoice	GUI information	Gui information not supported
  MethodName	Class information	Class information not supported
  MethodParam	Class information	Class information not supported
  MethodSynopsis	Class information	Class information not supported
  Modifier	Class information	Class information not supported
  MouseButton	Inline element
  Msg*	Msg elements	Message elements not supported

N - O

• nonterminal	EBNF element	See the section about ignored tags
  Note	<admonition type="note">
  OLink	<a>	Create a valid href using targetdoc and targetptr
  ooclass	Class information	Class information not supported
  ooexception	Class information	Class information not supported
  oointerface	Class information	Class information not supported
  Option	Inline element
  Optional	Inline element
  OrderedList	<list list-type=ordered
  Org	Info element	See the section about info elements
  OrgDiv	Info element	See the section about info elements
  OrgName	Info element	See the section about info elements
  OtherAddr	Info element	See the section about info elements
  OtherCredit	Info element	See the section about info elements

P

• package	Inline element
  PageNums	Info element	See the section about info elements
  Para	<p>
  ParamDef	Inline element
  Paramater	Inline element
  Part	<div html:class="db-part">
  PartIntro	<div html:class="db-partintro">
  Person	Inline element
  PersonBlurb	Info element	See the section about info elements
  PersonName	Inline element
  Phone	Inline element
  Phrase	<span>
  Pob	Inline element
  PostCode	Inline element
  Preface	<div html:class="db-preface">
  Primary	Not supported	See Index*
  PrimaryIE	No equivalence
  PrintHistory	Info element	See the section about info elements
  Procedure	<list item-label-generate='ordered'>
  Product*	Info element	See the section about info elements
  ProgramListing	<blockcode>
  Prompt	Inline element
  Property	Inline element
  PubDate	Info element	See the section about info elements
  Publisher*	Info element	See the section about info elements

Q

• qandadiv	Render sublist
  qandaentry	No equivalence	However, we use it to render it in definition list.
  qandaset	<list>	We render a set of question using definition list.
  question	<list-item-label>Q:</><list-item-body>
  quote	<quote>

Note : The qandaset has different behavior, and so should be converted according to these behavior :

• defaultlabel='None' : Just use para

• defaultlabel='number' : Use ordered list, with two para for each item.

• defaultlabel='qanda' : USe definition list with 'Q:' and 'A:' for the labels

R

• ref*	RefEntry not supported
  ReleaseInfo	Info element	See the section about info elements
  remark	Inline element
  Replaceable	Inline element
  ReturnValue	Inline element
  rev*	Info element	See the section about info elements
  rhs	EBNF Element
  row	<table-row>

S

• sbr	<line-break>
  screen	<blockcode>
  Screenshoot	<div html:class="db-screenshoot">
  Secondary	Not supported	See Index*
  SecondaryIE	Not supported	See Index*
  sect*	<heading>
  see	Not supported	See Index*
  SeeAlso	Not supported	See Index*
  segmentedlist	<list>
  seglistitem	<list-item>
  segtitle	No equivalence	However we saved these value for the conversion
  seg	Saved label+<list-item-body>
  SeriesVolumn	Info element	See the section about info elements
  set	<div html:class="db-set">
  setIndex	<div html:class="db-set">
  shortaffil	Inline element
  shortcut	Inline element
  sidebar	<div html:class="db-sidebar">
  simpara	<p>
  simplelist	<list>
  simplemsgentry	Msg elements	Message elements not supported
  simplesect	<div html:class="db-simplesect">
  spanspec	Need to check	We do not support span columned in db.cals.table
  state	Inline element
  step	<list-item><list-item-body >
  stepalternatives	<list-item><list-item-body >
  street	Inline element
  subject*	Info element	See the section about info elements
  subscript	<span baseline-shift>
  substeps	<list>
  subtitle	<div html:class="db-subtitle">
  superscript	<span baseline-shift>
  surname	Inline element
  symbol	Inline element
  synopsis	<div html:class="db-synopsis">
  synopfragment	<div html:class="db-synopfragment">
  synopfragmentref	Not supported
  systemitem	Inline element

T

• table	<table>
  tag	<span class=db-tag>	We support class and namespace attribute also.
  task*	<div html:class="db-task*">
  tbody	<table-body>
  td	<table-cell>
  term	<list-item-label>
  termdef	Inline element
  tertiary*	Not supported	See Index*
  textdata	Not supported	We do not support such of inclusion mechanism yet.
  textobject	See *Object conversion
  tfoot	<table-foot>
  tgroup	No equivalence
  th	<table-header>
  thead	<table-header>
  tip	<admonition type="tip">
  title	<<div html:class="db-title">	or <h> if in section.
  titleabbrev	No equivalence
  toc*	TOC element
  token	Inline element
  tr	<table-row>
  trademark	<span element="trademark">	Add a trademark sign at the end.
  type	Inline element

U - V

• uri	Inline element
  userinput	Inline element
  varargs	No equivalence	Funcprototype not supported.
  variablelist	<list>
  varlistentry	<list-item>
  varname	Inline element
  videodata	<object type='video'>
  videooject	See *object conversion
  void	No equivalence
  volumenum	Info element	See the section about info elements

W-X-Y

• warning	Admonition ?
  wordasword	Inline element
  xref	Too complex	Actually, implementation of such of feature would need some kind of mulit-pass conversion, which is not plan at this time.
  year	Info element	See the section about info elements

Unclear implementation

• Index
• Book

Reference

• http://docbook.org/tdg5/en/html/pt02.html

• DOM Tree specification