One or more logical domains may be utilized for partitioning and reorganizing a single physical domain or a search space constituted by a plurality of physical domains. Logical domains include at least one page selected from the plurality of pages in the physical domain. Responsive to a request for information, each logical domain may be ranked according to subject matter relevance to the information requested. Definition and relevance ranking of logical domains enables Web site mapping which supports multi-granularity and content-sensitivity in response to a request for information. A multi-granular site map presents users with differing levels of detail, from a general overview of site topology to detailed views of specific areas of the map. A topic-focused site map presents users with a general view of site topology with a detailed view of an area of the site which contains information of interest.