The paper introduces the navigation of digital libraries and
reviews most prominent problems confronting retrieval engine like multiple content
sources. distrihuted documents problem. multiple language problem, inaccurate
queries problem and availability of classification schemes problem etc . It traces
various solutions in terms of technologies developed for search engine retrieval like Meta
data extraction by various methods viz automatic extraction of words. structural
analysis, normalization of existing Meta data. using external reference data and citation
analysis etc. It explores equal ranking elaborating test runs with representative
queries etc: hesides dealing with proper treatment of queries ll'hich co1·ers
orthographic. morphological and vocabulary · variation . Discussion on data
aggregation resorting to distributed documents is given along with a
glimpse of future direction