Google's head of search quality, Peter Norvig, told a conference on semantics technology that the dominant search engine firm would not be concentrating its efforts on increasing its index size, but rather divvying up that index into discretely relevant chunks that can be attacked by different sorts of algorithms, according to a CNET report. Adding new forms of data, like text from books, continues to be useful, but Norvig indicated that the next billion internet pages that have to date gone uncrawled probably won't add a great deal of value.