58. The method of claim 56 , wherein, the tag is selected in response to determining that the location identifier of the initial content source includes a segment having the tag.
56. A method for mapping patterns of location identifiers of web pages to a semantic type using a tag, the method, comprising: selecting the tag from multiple tags associated with an initial content source; identifying a set of search results of a search query comprising the tag using a search engine; creating a set of patterns from each of a set of location identifiers corresponding to the set of search results; associating the set of patterns with a semantic type corresponding to the tag; and storing the association in a database on a machine-readable storage medium; receiving via a user interface a search query associated with the semantic type; mapping the search query into the pattern stored in the database based on the semantic type; and performing a search for other location identifiers matching the pattern for locating other web pages or other web pages including content embodied therein, that have a semantic relationship to the semantic type.