gistfile1.txt

# parse.rb

require 'rubygems'
require 'happymapper'
xml = File.read(File.expand_path(File.join(File.dirname(__FILE__), 'contact.xml')))

class Author
  include HappyMapper
  
  element :name, String
  element :email, String
end

class Feed
  include HappyMapper

  element :id, String
  has_one :author, Author
end

puts Feed.parse(xml).author.name


# contact.xml

<?xml version="1.0" encoding="utf-8"?>
<feed xmlns='http://www.w3.org/2005/Atom'
    xmlns:openSearch='http://a9.com/-/spec/opensearch/1.1/'
    xmlns:gContact='http://schemas.google.com/contact/2008'
    xmlns:batch='http://schemas.google.com/gdata/batch'
    xmlns:gd='http://schemas.google.com/g/2005'
    gd:etag='W/"CUMBRHo_fip7ImA9WxRbGU0."'>
  <id>liz@gmail.com</id>
  <updated>2008-12-10T10:04:15.446Z</updated>
  <category scheme='http://schemas.google.com/g/2005#kind'
    term='http://schemas.google.com/contact/2008#contact' />
  <title>Elizabeth Bennet's Contacts</title>
  <link rel='http://schemas.google.com/g/2005#feed'
    type='application/atom+xml'
    href='http://www.google.com/m8/feeds/contacts/liz%40gmail.com/full' />
  <link rel='http://schemas.google.com/g/2005#post'
    type='application/atom+xml'
    href='http://www.google.com/m8/feeds/contacts/liz%40gmail.com/full' />
  <link rel='http://schemas.google.com/g/2005#batch'
    type='application/atom+xml'
    href='http://www.google.com/m8/feeds/contacts/liz%40gmail.com/full/batch' />
  <link rel='self' type='application/atom+xml'
    href='http://www.google.com/m8/feeds/contacts/liz%40gmail.com/full?max-results=25' />
  <author>
    <name>Elizabeth Bennet</name>
    <email>liz@gmail.com</email>
  </author>
  <generator version='1.0' uri='http://www.google.com/m8/feeds'>
    Contacts
  </generator>
  <openSearch:totalResults>1</openSearch:totalResults>
  <openSearch:startIndex>1</openSearch:startIndex>
  <openSearch:itemsPerPage>25</openSearch:itemsPerPage>
  <entry gd:etag='"Qn04eTVSLyp7ImA9WxRbGEUORAQ."'>
    <id>
      http://www.google.com/m8/feeds/contacts/liz%40gmail.com/base/c9012de
    </id>
    <updated>2008-12-10T04:45:03.331Z</updated>
    <app:edited xmlns:app='http://www.w3.org/2007/app'>2008-12-10T04:45:03.331Z</app:edited>
    <category scheme='http://schemas.google.com/g/2005#kind'
      term='http://schemas.google.com/contact/2008#contact' />
    <title>Fitzwilliam</title>
    <link rel='http://schemas.google.com/contacts/2008/rel#photo' type='image/*'
      href='http://www.google.com/m8/feeds/photos/media/liz%40gmail.com/c9012de'
      gd:etag='"KTlcZWs1bCp7ImBBPV43VUV4LXEZCXERZAc."' />
    <link rel='self' type='application/atom+xml'
      href='http://www.google.com/m8/feeds/contacts/liz%40gmail.com/full/c9012de' />
    <link rel='edit' type='application/atom+xml'
      href='http://www.google.com/m8/feeds/contacts/liz%40gmail.com/full/c9012de' />
    <gd:phoneNumber rel='http://schemas.google.com/g/2005#home'
      primary='true'>
      456
    </gd:phoneNumber>
    <gd:extendedProperty name='pet' value='hamster' />
    <gContact:groupMembershipInfo deleted='false'
      href='http://www.google.com/m8/feeds/groups/liz%40gmail.com/base/270f' />
  </entry>
</feed>