When searching for some help on a topic on XML Namespaces, I encountered the following in my Google search:
The 2nd item in search results pointed to Why "Namespace 'http://www.w3.org/XML/1998/namespace' is not available to be referenced in this schema."? however, the title of the question is no where close to what the title is as it appears in the Google search.
I was logged into google and Stack Overflow at the time. The search string was "namespace not available to be referenced in this schema" (without quotes).