World wide web navigational mapping system and method

What is claimed is:

1. A system for navigating a plurality of computer-implemented sites accessible on a communications network, each site providing access to files stored at that site, at least some of the files including one or more hypermedia links to other files, comprising:

a browset accessing the files at the plurality of sites and displaying accessed files to a user;

a computer-implemented map maker parsing the files at one of the computer-implemented sites to identify hypermedia links in the files, organizing the parsed information, and generating a map data file based on the parsed and organized information that represents in structural, outline format files available at the one computer-implemented site to identify hypermedia links in the files;

a computer-implemented map database for storing the map data file; and

a computer-implemented map viewer, in response to a request from the browser to display the map data file, retrieving the map data file from the map database and displaying a map of the one computer-implemented site corresponding to the map data file, the site map graphically illustrating in the structural outline format the structure and content of the files available at the one computer-implemented site and the hypermedia links between those files, wherein the user uses the displayed site map to navigate the one computer-implemented site.

2. The system in claim 1, wherein some of the computer-implemented sites correspond to remotely-located computer sites that communicate over a network and wherein the map maker generates a corresponding site map for each of plural remotely-located computer sites and stores those corresponding site maps in the map database.

3. The system in claim 2, wherein when the browser accesses a new site, the map viewer retrieves and displays the map corresponding to the new remotely-located computer site.

4. The system in claim 1, wherein each of the computer-implemented sites are web sites that include a file server for providing access to files at the web site upon request, and wherein the map generated for the web site illustrates in the structural, outline format the files at the web site and the one or more hypermedia links between the files.

5. The system in claim 1, wherein entries of the map include text or graphic symbols or both to convey information about the site.

6. The system in claim 1, wherein the map is displayed in a portion of a user display, and as the user accesses different files at the computer-implemented site, the map viewer indicates on the site map a current location of the user in the site corresponding to the currently accessed file at the site.

7. The system in claim 1, wherein the map maker is located at a corresponding one of the plurality of computer-implemented sites and generates a map for its corresponding site and stores that map at the corresponding site.

8. The system in claim 7, wherein the map viewer is provided at a computer terminal connected to a communications network, the one site is remotely located from the computer terminal, and the map viewer retrieves the map stored at the one site over the communications network.

9. The system in claim 8, wherein the one site corresponds to a site file server and the computer terminal requests files from the site file server over the communications network.

10. The system in claim 1, wherein the map maker, map database, and map viewer are implemented by a computer connected to a communications network being used by the user.

11. A method for generating a hierarchical representation of informational objects available from one of a plurality of web sites, some of which are remotely-located from each other, each object including a file capable of being displayed and some of the objects including at least one hypermedia link to another file, comprising the steps of:

retrieving at another of the plurality of web sites at least some of the web site display files available at the one web site;

automatically parsing the retrieved web site display files to determine the identity of at least some of the web site display files and hypermedia link relationships between the web site display files; and

automatically organizing the parsed web site display files into a hierarchical representation of the parsed web site display files that identifies each web site display file and shows the hypermedia link relationships between the web site display files.

12. The method in claim 11, further comprising the step of:

specifying boundaries of the map to indicate where to stop the mapping process.

13. The method in claim 11, further comprising the step of:

annotating an entry in the map to provide additional information.

14. The method in claim 11, wherein another web site retrieves the display files from the one web site over the communications network.

15. The method in claim 11, further comprising the step of:

determining whether each of the identified hyperlinks is available or valid, and

indicating in the hierarchical representation if one of the identified hyperlinks is unavailable or invalid.

16. The method in claim 11, further comprising the step of:

determining a plurality of characteristics relating to each display file, and

representing each of the characteristics in the hierarchical representation as a graphical symbol.

17. The method in claim 16, wherein objects correspond to data files and the characteristics include any one or more of the following:

file type, file size, whether the file includes video, image, or audio related data, whether any one of the relationships is to a file at another one of the data processors, when the hierarchical representation was most recently modified, or what characteristics are to be excluded from the hierarchical representation.

18. The method in claim 11, further comprising the step:

specifying which of the parsed display files are to be included in the hierarchical representation.

19. A data structure stored in a memory and retrievable from the memory for display on a display connected to a first data processor that communicates with other remotely-located data processors over a network, wherein the data structure includes a structured outline of at least some of page data files available at one of the other remotely-located data processors coupled to the communications network accessible by the first data processor and of links between some of the display page data files, each page data file being capable of display and including at least one hypermedia link to another file, and

wherein the structured outline of at least some of the display page data files and associated hypermedia links available at the one remotely-located data processor is displayed and used to navigate through the display page data files at the one data processor.

20. The data structure in claim 19, wherein the display files correspond to HTML pages and the structured outline includes hypertext links between the HTML pages.

21. Software usable by a computer to assist a user in navigating through web sites on the World Wide Web over the Internet which when executed by the computer performs the method of:

organizing a collection of files and associated hyperlinks at one of the web sites into an outline;

based on the organized collection, generating a map data file for the one web site that represents in outline form the files available at the one web site and associated hyperlinks to a computer user having a computer coupled to the Internet including entries in the map outline for web page files and associated hyperlinks available at the one web site; and

displaying at the user's computer a map outline corresponding to the map data file for the one web site that graphically represents the outline structure of files available at the one web site and associated hyperlinks; and

navigating the one web site using the map outline including accessing one of the files at the one web site by selecting one of the outlined files from the displayed map outline.

22. The method in claim 21, wherein the map outline includes text identifying each file included as an entry in the map and links between entries.

23. The method in claim 22, wherein the map outline includes one or more icons or other graphical symbols associated with characteristics of at least some of the map entries, each icon or graphical symbol conveying information about the map entry.

24. The method in claim 23, wherein the characteristics include any one or more of the following:

file type, file size, date the file was last updated, estimated time to download, whether the file includes video, image, or audio related data, whether any one of the relationships is to a file at another one of the data processors, when the hierarchical representation was most recently modified, or what characteristics are to be excluded from the hierarchical representation.

25. The method in claim 21, wherein the map outline is a hierarchical outline of the files which identifies each resource and linking relationships between the files.

26. The method in claim 25, wherein the linking relationships include external links to files at another of the web sites, and wherein when the user pursues an external link, the method further comprises the steps of:

generating a map data file for the another web site that represents in outline form files available to the computer user, and

displaying at the user's computer a map corresponding to the map data file for the another web site.

27. The method in claim 26, further comprising the step of:

accessing one of the files at the another web site using the displayed map as a navigational aid.

28. The method in claim 27, wherein the maps corresponding to the one and the another web site are displayed at the user's computer at the same time.

29. The method in claim 21, wherein each web site includes an HTTP file server for serving a number of HTML page files corresponding to ones of the files.

30. In a system for navigating informational resources provided at a plurality of computer-implemented sites accessible on a communications network where for one of the computer-implemented sites a map data file is generated which outlines some of the files and associated hyperlinks available at the one computer-implemented site, a viewing engine for use at a user computer terminal connected to the communications network for retrieving the map data file for the one computer-implemented site, displaying a map corresponding to the map data file showing at least some of the files available at the one computer-implemented site, and permitting the user to navigate through files available at the one computer-implemented site to a desired one of the files using the displayed map, wherein the map is a hierarchical, tree-like representation of at least some of the files and associated hyperlinks available at the one site including a branch for each file.

31. The viewing engine in claim 30, wherein the user is transported by the viewing engine directly to one of the available files at the one site by selecting one of the branches from the map.

32. The viewing engine in claim 30, wherein the map is superimposed on the display as the user views a selected one of the files, and wherein the viewing engine tracks the progress by the user through various ones of the files and indicates on the map the current branch of the map at which the user is located.

33. The viewing engine in claim 30, wherein the map includes text identifying such file includes as an entry in the map.

34. The viewing engine in claim 33, wherein the map includes one or more icons associated with characteristics of at least some of the map entries, each icon conveying information about the map entry.

35. The viewing engine in claim 34, wherein the map entries correspond to data files and the characteristics include any one or more of the following:

file type, file size, date file last updated, whether the file includes video, image, or audio related data, whether any one of the relationships is to a file at another one of the data processors, when the hierarchical representation was most recently modified, or what characteristics are to be excluded from the hierarchical representation.

Description Submit all comments and votes

FIELD OF THE INVENTION

The present invention relates to data communications, and more particularly, to a method and apparatus for efficiently navigating information resources available over the World Wide Web.

BACKGROUND AND SUMMARY OF THE INVENTION

The Internet is a computer communications network built on worldwide data and telephone networks. Computers connected to the Internet can exchange information with any other connected computer. FIG. 1 is a simplified illustration of the "Internet Backbone." For example, the triangle in the center of FIG. 1 may represent the three major telephone conduits that exist between Washington, Los Angeles, and New York. The backbone is founded on various sets of major telephone conduits and switches that exist across the world. These communications conduits are designed to move large. Volumes of data traffic at high speed.

Each of the major conduits terminates at a router. The routers are large, fast switches that sort the large volumes of data for local routing, much as large post offices sort mail for local delivery. Each router is connected to additional, local routing devices. Some of the local routing devices, called "points of presence" ("POPs"), provide local Internet access. For example, an Internet termination router that exists in Washington may have point of presence routers connected in Baltimore, Alexandria, etc. A router can connect as many point of presence routers as the capacity of the switching systems and the Internet permit.

In addition to point of presence routers, commercial Internet exchanges (CIX in FIG. 1) and global Internet exchanges (GIX in FIG. 1) also connect to the routers. These exchanges transfer data between Internet service providers, both nationally and internationally. When data originates on one U.S. Internet service provider with a destination on another U.S. long distance provider, the data first routes to the commercial Internet exchange where it makes the transfer between providers. A similar situation occurs when data originates in one country bound for another country. The data first passes through the global Internet exchange where it is transferred from one provider to another. Additional local point of presence routers could connect off of the point of presence routers shown in FIG. 1. However, point of presence routers (POP1, POP2, POP3, etc.) usually provide a direct local connection point for various types of computers to connect to the Internet.

Personal computers of individual residential users typically connect to a local point of presence router through a local Internet carrier. As shown at POP2 in FIG. 1, a Local InterNet Carrier (LINC) obtains a direct line to the POP2, and then provides a modem or other connection via which a home computer user dials up for connection to the Internet. When the home computer connects to the modem of the local Internet carrier, the LINC switches the home computer to the POP2, which in turn connects it to the Internet.

Another method of connecting computers to the Internet is by direct connection through a local area network (LAN) to the point of presence. This example is shown as LAN#1 and LAN#2 connections to, respectively, POP1 and POP2. Specifically, the LAN#1 connects to the point of presence through a leased data line. The computers (PCs in FIG. 1) connected to the LAN receive and transmit data to the point of the presence through the LAN.

Also attached to the LAN are a variety of different servers, three of which are shown in FIG. 1. The File Server connects to the LAN and contains the common data files used by the PCs, LAN, and other Servers. An HTTP server is a particular type of server that processes incoming and outgoing data written according to a certain Internet communication protocol, called HyperText Transport Protocol HTTP). An electronic mail server processes e-mail data written to or eceived from the Internet.

As shown in FIG. 1, the Internet interconnects every computer on the Internet with every other computer on the Internet. An Internet site, such as LAN#1 for example, typically includes certain data files (called "web pages" which are a part of the World Wide Web or simply the "Web") in its file server. The Internet site HTTP server makes those pages available to other computers on the Internet. An HTTP Server that makes web pages available on the Internet usually includes a so-called "home page," which is the starting point for outside users to navigate through the underlying Web pages serviced by the HTTP Server. These Web pages are written in a special web language called HyperText Markup Language (HTML). When a user, such as the user of the "Home PC" (emanating from POP2 in FIG. 1), wants to view an Internet site's home page such as LAN#1's home page, it can do so by requesting that data from LAN#1 over the Internet. In response, LAN#1 retrieves the web page data from its File Server and instructs its HTTP Server to transmit the data, addressed to the Home PC, onto the Internet. The data travels from local leased link to the POP1, through the Internet via necessary routers, through POP2, through the local Internet carrier, and into the modem of the Hose PC. The request for the data from the Home PC to the LAN#1, of course, travels along the opposite path.

To insure that data is sent to and received by the appropriate receiver on the Internet, every "device" (e.g., workstation, PC, HTTP Server, File Server, etc.), communicating on the Internet is assigned a unique address called an Internet Protocol (IP) address. Elements of the IP address identify where in the network a device is connected. Other parts of the IP address identify the specific device. The IP address can be analogized to a phone number that can be called by another phone number to make a connection through a series of telephone switches. The phone number has an element (three digits) that identifies the state of the resident (i.e., the area code), an additional seven digits, three of which identify the local exchange of the resident, and four digits that specifically identify the home of the resident. The IP address is presently a thirty-two bit binary address, readily processed by computers, but cumbersome for use by human users. As a result, IP addresses are assigned mnemonics to make them more "user friendly." The mnemonic consists of two parts: a host name and a domain name. It is this mnemonic representation of the IP address which is commonly used by Internet users to access Web sites. Conventionally within the World Wide Web, the mnemonic "WWW" is used to represent the host name. The remaining portion of the mnemonic represents the domain or network where the host resides. For example, WWW.UCLA.EDU, identifies a host named "WWVW" in the domain (network) "UCLA.EDU."

FIG. 2 shows an address line written in the standard protocol used by Internet components to address each other and usually is used in the context of addressing a specific web page. The protocol is referred to as a "Uniform Resource Locator" (URL) and this terminology appears as the opening argument in the address of FIG. 2. In FIG. 2, the Uniform Resource Locator indicates that the request is for "http" formatted data, (i.e., a web page as opposed to, for example, an e-mail message). The home page for the data resides on the "zWWW" HTTP server on the "ucla.edu" LAN (or domain). The name of the file (to be found most likely in the file server supported by the ucla.edu LAN) is "homepage.html." If the ucla.edu LAN is LAN#1 of FIG. 1 and a PC user at LAN#2 wants to view the "homepage.html" file, the user sends the address shown in FIG. 2 to LAN#1 through the Internet channels shown in FIG. 1. Upon receipt of the address, LAN#1 returns to the user the "homepage.html" file over a reverse path through the Internet.

Once a user has received an "HTML" formatted file corresponding to a web page, the text of the displayed file may prompt the user to request additional information contained in different web page files. The prompts are referred to as "hypertext" and usually show up on a home page (or other web page) in a different color than normal text, thus distinguishing them as hypertext links. Hyperlinks may include any kind of hypertext or other hypermedia link from one HTML page to another HTML page in the current web site or in some external web site. Hypertext Markup Language is the computer language used to "compose" and represent information on a web page. As an example, a user requesting a local zoo home page may use several different hypertext links to files containing information on various animals at the zoo, a map of the zoo, operating times, etc. By clicking a mouse pointer on the hypertext, the user is automatically "transported" from a current web page to a new web page linked to that hypertext.

When the user clicks on a hypertext link, the user's data processor records the position of the computer pointer when the click occurred. The processor then uses a look-up table of x-y coordinates versus URLs to identify a new URL address assigned to the position of the computer pointer. The URL address may be serviced by the same domain or a different one, depending on the information contained in the look-up table. When the hypertext is selected, the browser requests a connection to the HTTP server hosting the file, and it also requests from the HTTP server the file identified by the URL. Once the HTTP server accepts the connection requested by the browser, the HTTP server proceeds to transmit back to the browser the requested file. Once the browser receives the requested file, it delivers or presents the content of the file to the requesting user.

The Internet provides a vast wealth of information. But the challenge is how to find a specific item of information hidden in that vast wealth. Anyone who has "surfed" the Internet knows that informational treasures can be found following some unusual routes leading to the discovery of the information. One of the most popular forms of surfing the Internet is the World Wide Web. In a sense, the Web is a client/server application that helps the user access various HTML pages available at various Internet sites. Its function is to display documents and to make links between items of information available. The user then chooses which links to follow as the user pursues a course through various Web pages. An Internet web site or simply web site refers to an entity connected to the Internet which supports Web communications and/or web files. A typical web site will include an HTTP server and one or more HTML pages (sometimes referred to as web pages).

A Web browsing session is similar in some respects to rummaging around in a flea market or a badly organized library. There is no doubt that you will discover much more than you realized, but there is some doubt whether you will find what was originally sought. On the one hand then, Web browsing is an enjoyable activity; on the other hand, Web browsing can be frustrating because it is difficult to easily target and go directly to a particular informational resource.

Hypertext links in a document allow a reader to jump from one object to another object within the document and to objects outside of the document. As a result, reading becomes a series of jumps to non-sequential points in the text rather than line by line of text. Hyperlinks between documents create an informational space with no formal pathways. A user browses starting from one HTML web page and simply explores from there. Consequently, no two paths through the web are likely to be the same. But the ability to know what informational resources are available and go directly to the specific information needed is lacking.

In fact, when browsing the Web, it is easy to become lost in the maze of hyperlinks. A hyperlink jump may take the reader up or down any number of levels or just as easily to another web server anywhere in the world. When entering a new web page, the user finds himself at a location chosen by the author of the previous web page. For example, consider a user viewing the "WOMBAT" home page. The user points to an article about wombats on an on-line magazine. After reading the article, the user then returns to the original WOMBAT home page without realizing that the magazine also included an article on wallabies, a subject in which the user also happens to be interested. Alternatively, the link may be to the magazine's home page rather than directly to the Wombat article. The user must then sift through a series of listings until he finds the issue having the Wombat article.

FIG. 3 shows a very simple example of how a web site is configured including a home page and a plurality of Hypertext Markup Language (HTML) pages each of which may contain one or more hyperlinks. FIG. 3 shows only a few hyperlinks between various ones of the HTML pages. As a user clicks on one hyperlink in the home page, he is transported to one of the three HTML pages in the first branch or tier. Page 1 may have for example a hyperlink which returns the user to the home page or a hyperlink which forwards the user to Page 4 or 5. Page 4 has a return link to the home page while Page 5 has a return link to Page 2. Even with this extremely simple example showing only one or two hyperlinks per page for just a few pages, it is apparent that a user can quickly get lost in the maze of HTML pages accessible through the HTTP server of that web site. This maze is complicated and enlarged when a hyperlink takes the user to another HTTP server at another web site which could theoretically be anywhere else in the world.

What is needed is a quick way to identify the various types of information available at an Internet web site having web pages without actually having to go to that site or browse through its HTML pages. It would also be desirable to traverse through various web pages at one or more sites without having to tediously "click" multiple times the browser "BACK" and/or "FORWARD" buttons. Instead, it would be very helpful to have a graphical representation or map of one (or more) Internet web sites that reveals the structure and content of the Internet web sites so the user knows what information is provided on each page and what web pages are linked to other web pages.

It is an object of the present invention to provide a web user with a 2-dimensional, 3-dimensional, "virtual reality," or other graphical representation of the structure of one or more web sites to permit a user to navigate through the web site efficiently using the structure.

It is a further object of the present invention to permit a user to represent objects in a web site and links to/from those objects in a hierarchical tree structure for display.

It is a further object of the present invention to provide the user with a map which provides the user with an easy to read, graphical image of where the user is in a web site and where he may go, e.g., at which HTML page the user is currently located and the links to other HTML pages supported by the HTTP server at that site.

It is a further object of the present invention to provide a Web user a map which through graphical symbols and/or text provide information about the content, size, estimated time to download the page, date last updated, whether the page has changed since the user last visited the site, and other information which would make it easier for the user to grasp the nature of the Web site and thus make decisions as to where to go on the Web site.

It is a further object of the present invention to provide a web site mapping mechanism which parses the various objects contained in a web site and organizes those objects and links between those objects into an organized fashion (e.g., a hierarchical structure).

The present invention solves these problems and meets these and other objects with an Internet navigational mapping system. In essence, the navigational map gives a user in a condensed graphic image the structure and clues to the content of one or more web sites that allows the user to navigate through the web site using that structure. At a basic level, the map represents how various objects at a web site are linked to other objects. Any object found at a Web site such as web pages, graphics, audio clips, animation, etc. may be mapped.

Therefore, the Web navigational map in accordance with the present invention is much like a road map. Instead of having to drive from Washington, D.C. to New York over various interstates, highways, and secondary roads following only signs along those roadways which indicating that you are heading towards New York, the map allows the user to view the map (without even getting in his car) to determine beforehand the most efficient and direct road route to New York as well as to check out various other options in which the user may be interested. For example, in viewing the map the driver may decide that it is important first to stop off in Philadelphia before travelling on New York. If the driver had simply followed the road signs on the interstates, there may not have been signs on the roads actually being driven by this driver pointing to Philadelphia. Accordingly, the present invention allows the user to visualize paths through one or more web sites to various destinations without having to actually follow/explore those paths to know that they exist and where they lead.

The Web navigational mapping system has two central components: a map maker and a map viewer. The map maker generates a navigational map of objects and links present at a web site. The map maker arranges the various hyperlinks between objects in the web site in an easy to read, hierarchical fashion, and in the preferred example embodiment, this hierarchy resembles a tree. Each branch of the tree provides textual and graphical information which describes the content of the web object the branch represents. The text describes the substantive content of the object. One or more icons relate to various characteristics of the object including the type of object, (e.g., an HTML file), an in-line picture, an external link, the size of the file, etc. Both the text and icons help the user know what information is available at the web site and visualize where the user is and where he may go in the site.

The web site navigational map is stored in a map database and can be loaded locally or downloaded by a network browser such as NETSCAPE.TM.. The map viewer retrieves the web site map from the database and displays the map. The user then has a clear picture of what is in the site, where objects are located, and how objects are interlinked. The user also has a graphical structure that shows the user where he is in the site and where he may go. The user may jump to any site object directly simply by selecting the corresponding map entry. Using this displayed hierarchical representation of the web site, the user knows in advance the content of a web page. In other words, the user does not have to actually travel through that web site unless it contains something the user wants to see.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other objects and features of the present invention will be described in further detail in conjunction with the following drawings in which like reference numerals refer to like elements in which:

FIG. 1 is a diagram showing the Internet with various routers, points of presence, and sites;

FIG. 2 illustrates components of a uniform resource locator (URL), which is part of the mechanism used to locate various informational resources on the World Wide Web;

FIG. 3 is a function block diagram of a web site having an HTTP server hosting a home page and a number of HTML web pages;

FIG. 4 is a function block diagram showing a Web navigational system in accordance with one example embodiment of the present invention;

FIG. 5 is a function block diagram showing a Web navigational system in accordance with another example embodiment of the present invention;

FIG. 6 is a very simple example of a web site map;

FIG. 7 illustrates various example legends of icons which may be used in the creating a web site map;

FIG. 8 is a function block diagram showing how an Internet browser on a user PC interprets incoming HTML pages over the Internet and employs when necessary various "helping" viewers to analyze and display information from that incoming HTML page;

FIG. 9 is a flowchart diagram illustrating basic map creation and map viewing procedures followed in accordance with the example embodiment of the present invention;

FIG. 10 is a flowchart diagram of the exemplary steps performed in creating one or more web site maps in accordance with the example embodiment of the present invention; and

FIG. 11 is a flowchart diagram illustrating various steps is performed in viewing one or more site maps to permit a user to navigate efficiently and effectively through that web site.

DETAILED DESCRIPTION OF THE INVENTION

For purposes of explanation and not limitation, specific details are set forth such as specific software engines, software interfaces, display features, and control procedures in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well known methods, hardware devices, network protocols, operating system platforms, etc. are omitted so as not to obscure the description of the present invention with unnecessary detail.

An Internet World Wide Web navigational mapping system 10 is shown in the function block diagram in accordance with an example embodiment of the present invention. It should be understood that the present invention may be applied to any Web application on any type of network including public networks such as the Internet and private networks such as a network accessible only by a certain company's employees, etc. Thus, for example, both Internet web sites and Intra-Nets web sites can be effectively navigated using the present invention. Reference to the Internet throughout the description therefore is meant only as a convenient, non-limiting example of a network that supports a Web application.

The Web navigational mapping system 10 operates using a work station and/or a PC-based data processing engine and operating platform 20. This data processing platform contains conventional data processing hardware (e.g., CPU, memory, communications, drivers and interfaces, etc.), software (e.g., operating, communications, and applications programs, etc.), and user interface including a keyboard, mouse, display monitor, etc. The navigational mapping system 10 is implemented on this platform 20 using various software structures including computer programs and one or more databases.

A central software structure is the Internet browser 12 which is a software program that establishes a connection from the user's computer to a web site so that it can request and receive data (e.g., HTML web pages) over the Internet. The browser 12 also interprets HTML data and presents it to the user on the display screen using text and graphics formats most readily understood by the user. In addition, the browser uses other "helper" software structures to interpret and/or present HTML information to the user as described in further detail below in conjunction with FIG. 8. One commercially available browser is provided by NETSCAPE. Browser 12 connects over the Internet represented generally as block 22 to various web sites 24a, 24b, 24c, . . . 24n on the Internet. Browser 12 interfaces with a map viewer 18.

The map maker 14 analyzes the files at a web site supported by the site's HTTP server. A typical example of such a file is an HTML web page. Based on that analysis, the map maker 14 creates a map of the web site which, in a preferred example embodiment, is configured as a hierarchical, tree-type data structure. The hierarchical map data structure identifies each HTML page at the web site, the links between those pages, and various characteristics of each HTML page. Although the present description usually refers to a single web site being mapped by the map maker 14, those skilled in the art will appreciate that multiple web sites may be advantageously mapped by map maker 14 such that multiple site maps are stored in map databas