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Table Of Contents  The TCP/IP Guide
 9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
      9  TCP/IP Key Applications and Application Protocols
           9  TCP/IP Application Layer Addressing: Uniform Resource Identifiers, Locators and Names (URIs, URLs and URNs)
                9  Uniform Resource Locators (URLs)

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URL Schemes (Applications / Access Methods) and Scheme-Specific Syntaxes
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URL Length and Complexity Issues
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URL Relative Syntax and Base URLs
(Page 4 of 4)

Improving Document Portability Using Relative URLs

There is one other very important benefit of using relative URLs: avoiding absolute URLs in a document allows it to be more portable by eliminating “hard-coded” references to names that might change. Going back to our previous example, if the guy maintaining the site “http://www.longdomainnamesareirritating.com/” uses only relative links to refer to graphics and other embedded objects, then if the site is migrated to “www.muchshortername.com”, he will not have to edit all of his links to the new name. The significance of this in Web URLs is explored further in the detailed topic on HTTP URLs.

Key Concept: In addition to being more efficient than absolute URLs, relative URLs have the advantage that they allow a resource designer to avoid the specific mention of names. This increases the portability of documents between locations within a site, or between sites.



Previous Topic/Section
URL Schemes (Applications / Access Methods) and Scheme-Specific Syntaxes
Previous Page
Pages in Current Topic/Section
123
4
Next Page
URL Length and Complexity Issues
Next Topic/Section

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Version 3.0 - Version Date: September 20, 2005

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