Is there an alternative to HTML? [closed]

A good choice is Haml. In Haml, you write highly structured markup that resembles a stripped-down form of HTML, and where common things have easy shortcuts. For example, adding an element, div, id, or class is done just by changing one character.

It even lets you pass variables in and operate on them in the language of your choice by deferring to a scripting language, so it’s actually more powerful than HTML since the implicit scripting makes it Turing-complete.

Here’s an example:

  %body
    #header
      %h1 Bob Loblaw's Law Blog
      %h2 by Bob Loblaw
    #content
      - @entries.each do |entry|
        .entry
          %h3.title= entry.title
          %p.date= entry.posted
    #footer
      %p
        All content copyright © Bob Loblaw.

This becomes something like:

<div id='header'>
  <h1>Bob Loblaw's Law Blog</h1>
  <h2>by Bob Loblaw</h2>
</div>
<div id='content'>
  <div class="entry">
    <h3 class="title">You don't need double-talk; you need Bob Loblaw</h3>
    <p class="date">Tuesday, October 31, 2006</p>
  </div>
  <div class="entry">
    <h3 class="title">Why should you go to jail for a crime someone else noticed?</h3>
    <p class="date">Friday, August 11, 2006</p>
  </div>
</div>
<div id='footer'>
  <p>
    All content copyright © Bob Loblaw.
  </p>
</div>