5. The method of claim 4 , wherein at least one of the plurality of features includes one or more of a tag, a frequency of occurrence of a term within the document, a frequency of occurrence of a term in a link text of the document, a frequency of occurrence of a term in an abstract of the document, a frequency of occurrence of a term in a summary of the document, a frequency of occurrence of a term in an anchor text in the document, a frequency of occurrence of a term in a summary information in the document, a structure of the document, a length of the document, a type of the document, a date of creation of the document, a link to the document, a position of the document in a search results list, a number of times the document has been accessed from a search results list, a term score, or a link structure.
4. The method of claim 1 , wherein determining the relevance formula comprises utilizing the previously stored user input to update the relevance formula and modify at least one of the coefficients.