SXML        SRML
o document information
  - title                      <ti>        Title:
  - subtitle                   <st>        Subtitle:
  - author                     <au>        Author:
  - date                       <da>        Date:
  - abstract                   <ab>        Abstract:

o heading
  - levels 1-4                 <h[1-4]>    == -- ~~ ..

o list
  - unordered list             <ul>        o  -  *
  - ordered list               <ol>        o. -. *.
    . list items               <li>        
  - description list           <dl>
    . description term         <dt>        .. ::
    . description text         <dd>

o table                        <ta>        ++
  - table rows                 <tr>        
  - table columns/cells        <tc>        |
  - column/row spanning        
  - column title               <t?>

o character formatting 
  - logical formatting
    . emphasized text          <em>        !!
    . tele-typed text          <tt>        ''   or ||
  - visual formatting
    . bold text                <bo>        **
    . underlined text          <ul>        __
    . italic text              <it>        //   or ''
    . boxed text               <bx>        [[
    . super-scripting                      ^^
    . sub-scripting                        ;;

o text formatting
    . line break               <br>        \\
    . aligned                  <al>        (( %% ))
    . indented                 <in>        >>
    . pre-formatted            <pf>        && or $$ or §§ or "" or °° or ??

o cross-referencing 
  - anchor                     <an>        (+..+)
  - reference                  <xr>        ->..(..) or ->[..:]..<-

o comments                     <co>        ##

o entities                     <en>        {{name[ param=value ...]}}
  - figure                                 {{figure src="..." format=eps}}
  - embedded object                        {{eo src=".."}}
  - passed-through                         {{pass format=html value="<br>"}}

#   o 1d-Blocks
#     <tag> <text> <tag>
#     <tag> <text> 
#     <text> <tag>
#   o 2d-Blocks
#     <ws> <tag> <text>
#     [<ws> <ws> <text>]
#       :
#   tags am Ende eines 1-dim Blocks wrappen an den Anfang!
#   tags koennen 2 oder mehr ihrer Sonderzeichen lang sein
#   (tags koennen auch in reverse order sein fuer symmetrie (+ +) -> <-)
#   ende von 1d-block ist leerzeile
#   ende von 2d-block ist ausrueckung