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67 lines
2.3 KiB
67 lines
2.3 KiB
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta name="generator" content=
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"HTML Tidy for Mac OS X (vers 31 October 2006 - Apple Inc. build 13), see www.w3.org" />
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<title>
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BuildingBackLinks -- /DesignIssues
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</title>
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<nextid />
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</head>
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<body bgcolor="#FFC060" text="#302005">
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<a href="OldDocs.html"><img src=
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"../Icons/WWW/arch1990.gif" /></a>
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<hr />
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<h1>
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Building back-links
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</h1>
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<h2>
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Why back links?
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</h2>This <a name="1" href="Topology.html#14">discussion on
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link topology</a> differetiates between systems with
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mon-directional and those with bidirection links. In practice,
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a system
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<p>
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in which different parts of the web have different
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capabilities cannot insist on bidirectional links.
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</p>
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<p>
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Imagine, for example the publisher of a large and famous book
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to which many people refer but who has no interest in
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maintaining his end of their links or indeed in knowing who
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has refered to the book. In this case the link may be only of
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use to the person who made it.
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</p>
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<p>
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However, there are cases in which the back-links are of great
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interest, and so they may be generated off line.
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</p>
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<h2>
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How?
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</h2>One way is for a <a name="2" href=
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"../Terms.html#daemon">daemon</a> to read all of the documenst
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on a particular domain, and make a database of the links, then
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redistribute to the servers the back links.
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<p>
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Another way is suggested by Phillip Hallam-Baker who
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"wondered about a tag being added to the get protocol to
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indicate where the text was being accessed from. This could
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then be used by intelligent servers to create back links - if
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this was desired. This would allow the wed to grow dynamicaly
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since I would know that logging onto any "key" W3 server I
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would be able to travel to all those parts of the web I was
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meant to..."
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</p>
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<p>
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This method would also provide intersting statistics on the
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use of particular links, which would enhance the usage
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logging.
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</p>
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<p>
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_________________________________________________________________
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</p>
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<address>
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<a name="0" href=
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"http://www.w3.org./hypertext/TBL_Disclaimer.html">Tim BL</a>
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</address>
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</body>
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</html>
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