Generating an atom feed with a JavaScript DSL

AtomFeed.js

var generateUniqueId = function(post) {
  return [
    'tag:brianmavity.com,',
    post.publishDate.slice(0, 10),
    ':/blog/',
    post.publishDate.replace(/T|Z|\.|:|-/g, '')
  ];
};

doc(
  '<?xml version="1.0" encoding="utf-8"?>',
  feed({ xmlns: 'http://www.w3.org/2005/Atom' },
    link({ rel: 'self', href: 'http://blog.brianmavity.com/blog/atom' }),
    id('tag:brianmavity.com,2008:/blog'),
    title('brianmavity.com'),
    subtitle('Learn with me'),
    link({ href: 'http://blog.brianmavity.com/' }),
    updated(posts[0].publishDate),
    author(
      name('Brian Mavity')
    ),
    posts.map(function(post) {
      return entry(
        title(post.title),
        link({ href: 'http://blog.brianmavity.com/' + post.slug }),
        id(generateUniqueId(post)),
        published(post.publishDate),
        updated(post.publishDate),
        content({ type: 'html' }, htmlEncode(post.content)),
        author(
          name(post.author)
        )
      )
    })
  )
);