IfBlog
A conditional tag that produces its contents when there is a blog in context. This tag is useful for situations where a blog may or may not be in context, such as the search template, when a search is conducted across all blogs.
Example:
<mt:IfBlog>
<h1>Search results for <$mt:BlogName$>:</h1>
<mt:Else>
<h1>Search results from all blogs:</h1>
</mt:IfBlog>