will sitemap.xml be rejected/invalid if xml elements contain extra attributes?

I want to know if Google Sitemaps would accept something like the
following (I added a 'type' to the loc element)?

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.google.com/schemas/sitemap/0.84">
<url>
<loc type="home">http://www.hillcountrymassage.com/</loc>
<changefreq>weekly</changefreq>
</url>
<url>
<loc
type="sub">http://www.hillcountrymassage.com/PriceList.htm</loc>
<changefreq>weekly</changefreq>
</url>
</urlset>

I know I can find this out by submitting and waiting for Google to
index, but that will be days... I'm trying to get a quicker answer if
possible...

Thanks!
Aaron