15. A system for aiding a user in navigating documents containing hyperlinks, the system comprising: a plurality processors; first means for storing reader preferences relating to information contained in the headers of secondary documents; second means for including an audience category in the reader preferences, whereby the user may obtain a modified hyperlink indication of relevance to reader preferences by secondary document author; third means for including an identification of a domain in the reader preferences, whereby the user may obtain a modified hyperlink indicating a secondary document from a predetermined source that the user expects to be useful; fourth means for retrieving a document from a network location; fifth means for parsing the document for hyperlinks associated with secondary documents; sixth means for responsive to detecting a hyperlink, for sending a request to a server for the header of the secondary document associated with the hyperlink, wherein the header contains information sufficient corresponding to characteristics of the secondary document; seventh means for receiving only the secondary document header from a hypertext server responding to the request; eighth means for comparing the information within the header of the secondary document to the stored reader preferences; and ninth means for modifying the presentation of the hyperlink to the user based on results of the comparison of the information contained within the header with the stored reader preferences.
15. A system for aiding a user in navigating documents containing hyperlinks, the system comprising: a plurality processors; first means for storing reader preferences relating to information contained in the headers of secondary documents; second means for including an audience category in the reader preferences, whereby the user may obtain a modified hyperlink indication of relevance to reader preferences by secondary document author; third means for including an identification of a domain in the reader preferences, whereby the user may obtain a modified hyperlink indicating a secondary document from a predetermined source that the user expects to be useful; fourth means for retrieving a document from a network location; fifth means for parsing the document for hyperlinks associated with secondary documents; sixth means for responsive to detecting a hyperlink, for sending a request to a server for the header of the secondary document associated with the hyperlink, wherein the header contains information sufficient corresponding to characteristics of the secondary document; seventh means for receiving only the secondary document header from a hypertext server responding to the request; eighth means for comparing the information within the header of the secondary document to the stored reader preferences; and ninth means for modifying the presentation of the hyperlink to the user based on results of the comparison of the information contained within the header with the stored reader preferences. 21. The system as recited in claim 15 , wherein the information is encoded in meta tags.