A talk by MSRA DMS group manager

Today, I attended a talk by Wei-ying Ma, the manager of DMS group in Microsoft Research Asia.
His talk focus on web structure and web search. According his opinion, there are many different
types of structure in web data that have not been exploited beside the link structure.
The clue of his talk is as following:
Web page----------->Link structure[of which Pagerank and HITS are based on]
---------->Layout structure [block structure in his WWW2004 paper]
---------->Category structure [semantic structure within a group of web pages such as the structure of the search results]
---------->Discussion Thread structure[structure of information in the discussion board]
---------->Community structure[Object based structure]
---------->Deep structure [structure of deep web].

As a conclusion, he pointed out the characteristics of the next generation search engine should be like this:
From Page to Block; from Surface web to Deep web; from Unstructured data to structured data; from relevance to intelligence; from desktop search to mobile search.