<urlset 

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd"

xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"

xmlns:example="http://www.example.com/schemas/example_schema">