Is it possible to generate plain-old XML using Haml?

This demonstrates some things that could use useful for xml documents:

!!! XML
%root{'xmlns:foo' => 'http://myns'}
  -# Note: :dashed-attr is invalid syntax
  %dashed-tag{'dashed-attr' => 'value'} Text
  %underscore_tag Text
  - ['apple', 'orange', 'pear'].each do |fruit|
    - haml_tag(fruit, "Yummy #{fruit.capitalize}!", 'fruit-code' => fruit.upcase)
  %foo:nstag{'foo:nsattr' => 'value'}

Output:

<?xml version='1.0' encoding='utf-8' ?>
<root xmlns:foo='http://myns'>
  <dashed-tag dashed-attr='value'>Text</dashed-tag>
  <underscore_tag>Text</underscore_tag>
  <apple fruit-code='APPLE'>Yummy Apple!</apple>
  <orange fruit-code='ORANGE'>Yummy Orange!</orange>
  <pear fruit-code='PEAR'>Yummy Pear!</pear>
  <foo:nstag foo:nsattr='value'></foo:nstag>
</root>

Look at the Haml::Helpers link on the haml reference for more methods like haml_tag.

If you want to use double-quotes for attributes,

See: https://stackoverflow.com/a/967065/498594

Or outside of rails use:

>> Haml::Engine.new("%tag{:name => 'value'}", :attr_wrapper => '"').to_html
=> "<tag name=\"value\"></tag>\n"

Doing XML in HAML is easy, just start off your template with:

!!! XML

which produces

<?xml version='1.0' encoding='utf-8' ?>

Then as @beanish said earlier, you "make up your own tags":

%test
  %test2 hello
  %item{:name => "blah"}

to get

<test>
  <test2>hello</test2>
  <item name='blah'></item>
</test>

More: http://haml.info/docs/yardoc/file.REFERENCE.html#doctype_

%test
  %test2 hello
  %item{:name => "blah"}

run it through haml

haml hamltest.haml test.xml

open the file in a browser

<test>
  <test2>hello</test2>
  <item name='blah'></item>
</test>

The HAML reference talks about html tags and gives some examples. HAML reference