16. The system of claim 12 , wherein indexing the second document for searching comprises generating search-related metadata relating to the second document, and adding the search-related metadata to a search index.
16. The system of claim 12 , wherein indexing the second document for searching comprises generating search-related metadata relating to the second document, and adding the search-related metadata to a search index. 17. The system of claim 16 , wherein the search index is an inverted index.