For the XML sitemap of my website, I noticed that different articles suggest different things.
For example, prior to my page listings, some articles suggest starting it this way:
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
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">
While other articles have it layed out using only:
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
Do I need to include all of the extra stuff from the first example?
And what exactly is the difference between using the extra parts, or not using them?