void AddToResult(SearchResult result, Postings found)
		{
			foreach (Posting posting in found)
			{
				result.Add(new SearchHit(posting.Record));
			}
		}		
		void IndexByToken(Token token, IRecord record, IndexedField field)
		{
			Postings postings = (Postings)_postings[token.Value];
			if (null == postings)
			{
				postings = new Postings(token.Value);
				_postings[token.Value] = postings;
			}
			postings.Add(record, field, token.Position);
		}