# Examples of Resolving Relative URLs, Part 4

This document has an embedded base URL of

       Content-Base: fred:///s//a/b/c

in order to test a notion that Tim Berners-Lee mentioned regarding the ability of URIs to have a triple-slash (or even more slashes) to indicate higher levels of hierarchy than those already used by URLs.

## Tested Clients and Client Libraries

[R]
  RFC 2396 (the right way to parse)
Tim
  Tim Berners-Lee's proposed interpretation
[1]
  Mozilla/4.03 [en] (X11; U; SunOS 5.5 sun4u; Nav)
[2]
  Lynx/2.7.1 libwww-FM/2.14
[3]
  MSIE 3.01; Windows 95
[4]
  NCSA_Mosaic/2.6 (X11;SunOS 4.1.2 sun4m)

### Synopsis

RFC 1808 specified that the highest level for relative URLs is indicated by a double-slash "//", and therefore that any triple-slash would be considered a null site component, rather than a higher-level component than the site component (as proposed by Tim).

The URI draft assumes that a triple-slash means an empty site component. Netscape Navigator behaves irrationally, apparently because their parser is scheme-dependent and therefore doesn't do the hierarchical parsing that would be expected. Oddly, Lynx seems to straddle both sides.

## Examples

                      RESULTS                       from

    g:h            =  g:h                           [R,Tim,2,3]
                      fred:///s//a/b/g:h            [1]

    g              =  fred:///s//a/b/g              [R,Tim,1,2,3]

    ./g            =  fred:///s//a/b/g              [R,Tim,2,3]
                      fred:///s//a/b/./g            [1]

    g/             =  fred:///s//a/b/g/             [R,Tim,1,2,3]

    /g             =  fred:///g                     [R,1,2,3]
                      fred:///s//a/g                [Tim]

    //g            =  fred://g                      [R,1,2,3]
                      fred:///s//g                  [Tim]

    //g/x          =  fred://g/x                    [R,1,2,3]
                      fred:///s//g/x                [Tim]

    ///g           =  fred:///g                     [R,Tim,1,2,3]

    ./             =  fred:///s//a/b/               [R,Tim,2,3]
                      fred:///s//a/b/./             [1]

    ../            =  fred:///s//a/                 [R,Tim,2,3]
                      fred:///s//a/b/../            [1]

    ../g           =  fred:///s//a/g                [R,Tim,2,3]
                      fred:///s//a/b/../g           [1]

    ../../         =  fred:///s//                   [R]
                      fred:///s//a/../              [Tim,2]
                      fred:///s//a/b/../../         [1]
                      fred:///s//a/                 [3]

    ../../g        =  fred:///s//g                  [R]
                      fred:///s//a/../g             [Tim,2]
                      fred:///s//a/b/../../g        [1]
                      fred:///s//a/g                [3]

    ../../../g     =  fred:///s/g                   [R]
                      fred:///s//a/../../g          [Tim,2]
                      fred:///s//a/b/../../../g     [1]
                      fred:///s//a/g                [3]

    ../../../../g  =  fred:///g                     [R]
                      fred:///s//a/../../../g       [Tim,2]
                      fred:///s//a/b/../../../../g  [1]
                      fred:///s//a/g                [3]