wget.info: Relative Links

Following Links

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4.4 Relative Links
==================

When ‘-L’ is turned on, only the relative links are ever followed.
Relative links are here defined those that do not refer to the web
server root.  For example, these links are relative:

     <a href="foo.gif">
     <a href="foo/bar.gif">
     <a href="../foo/bar.gif">

   These links are not relative:

     <a href="/foo.gif">
     <a href="/foo/bar.gif">
     <a href="http://www.example.com/foo/bar.gif">

   Using this option guarantees that recursive retrieval will not span
hosts, even without ‘-H’.  In simple cases it also allows downloads to
“just work” without having to convert links.

   This option is probably not very useful and might be removed in a
future release.