_template = jinja2.Template(textwrap.dedent('''\
    <?xml version="1.0" encoding="UTF-8"?>
     <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
     {%- for doc in documents %}
       <url>
         <loc>{{ doc.abs_url }}</loc>
         <lastmod>{{ doc.updated_local.isoformat() }}</lastmod>
       </url>
     {% endfor -%}
     </urlset>
'''))

def _generate_sitemap_xml(documents):
    xmldocument = minidom.Document()
    root = xmldocument.createElement('urlset')
    root.setAttribute('xmlns', 'http://www.sitemaps.org/schemas/sitemap/0.9')
    xmldocument.appendChild(root)

    for document in documents:
        url = xmldocument.createElement('url')
        root.appendChild(url)

        loc = xmldocument.createElement('loc')
        loc.appendChild(xmldocument.createTextNode(document.abs_url))
        url.appendChild(loc)

        lastmod = xmldocument.createElement('lastmod')
        lastmod.appendChild(xmldocument.createTextNode(document.updated_local.isoformat()))
        url.appendChild(lastmod)

    return xmldocument.toprettyxml()