The SEO moz is showing an error on one of the sites within my SE Moz account campaign under Crawl Diagnostics: Title tag missing or empty. No problem here but the file associated with this issue is sitemap.xml and that just dose't look right as as far as I know xml files are title tag free. I've searched around and i've  been able only to confirm my initial thought that sitemap.xml dose't use a title tag .. like any other xml. is this an issue ? (the error that is) or i should let it slide. can it be fixed ? if yes, how ? Thanks !

Hello, Please let me know what are the exact right steps in order to get rid of the duplicate content issues related with: www.domain.com/index.html same as www.domain.com  without creating an infinite loop. Do you have a step by step guide posted within seomoz including 301 redirect for non www to www for all urls and index.whatever to main domain name without going into a infinite loop ? btw how to you spot the loop ? is it obvious like never ending refresh of the home page ? thanks a lot !