A PrettyLinkUrl, also called a UserFriendlyLinkUrl has the following advantages over  an UglyLinkUrl, also called a UserUnfriendlyLinkUrl:
      - easier to memorize
- easier to refer to from external websites
- easier to find in search-engines
- easier to connect with other PrettyLinkUrl s
- easier to set up by the user
- easier to spot by the user
- easier to build connected collaboration (internal+external, especially IncidentalCollaboration)
- ...
 It is a precondition to generate the document.title in the DOM of debategraph pages
  Example:
 This node has the PrettyLinkUrl --> "http://debategraph.org/PrettyLinkUrl" (without parms)
 This node could have the PrettyLinkUrl --> "http://debategraph.org/PrettyLinkUrl" & iv=all   (with parms)
 This node has the UglyLinkUrl   --> "http://debategraph.org/Stream.aspx?nid=145198  (without parms)
 This node has the UglyLinkUrl   --> "http://debategraph.org/Stream.aspx?nid=145198&iv=05" (with parms)
 
 -- fridemar 2012-03-17 01:00:50 CET
 
 