Welcome to the Q&A Forum

Hi there, I am having some difficulty with an error on Webmaster Tools.  I'm concerned with a possible duplicate content penalty following the launch of my mobile site. I have attempted to update my sitemap to inform Google that a different mobile page exists in addition to the desktop page. I have followed Google's guidelines as outlined here:
http://support.google.com/webmasters/bin/answer.py?hl=en&answer=34648 I'm having problems with my sitemap.xml file.  Webmaster tools is reporting that it is not able to read the file and when I validate it I am getting an error stating that the 'Namespace prefix xhtml on link is not defined'. All I am trying to do is to create a sitemap that uses the rel="alternate" to inform Google that their is a mobile version of that specific page in addition to the desktop version. An instance of the code I am using is below: xml version="1.0" encoding="UTF-8"?> xml-stylesheet type="text/xsl" href="gss.xsl"?> <urlset< span="">xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.google.com/schemas/sitemap/0.84 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd"> http://www.mydomain/info/detail/ <xhtml:link< span="">rel="alternate" media="only screen and (max-width: 640px)" href="http://m.mydomain.com/info/detail.html"/> <lastmod></lastmod>2013-02-01T16:03:48+00:00<changefreq></changefreq>daily0.50</xhtml:link<></urlset<> Any help would be much appreciated. Thanks

Hi there, I'd like to ensure I avoid a duplicate content penalty and could do with some advice. There is a popular blogger in my industry.  I have agreed to add his blog to my website.  He currently posts his blog on one of the popular free blogger platforms, and will continue to do this. The issue is that I will be posting duplicate content onto my site and I want to ensure that I do not trigger a google penalty. Is there a simple way form me to inform Google of the original source of the content. My intitial thoughts are: 1. Add a noindex to the Robots.txt file 2. Add a link at the beginning of the article pointing to the original source 3. Adding a rel=canonical tag in the header of each blog entry pointing to the original blog post which resides on a completely different domain. Thanks DBC