anchor.diff:  === User Name
   TBD
   
  -=== This Document's templates
  +== This Document's templates
   
   ==== Level3
   
  
positive.code: determined in the 'User Name' definition. At leased, +tg+ uses the environment variable
  +LOGNAME+.
  
  == Template Generation
  
  +tg+ generates for each Blueprint File in a Template Container a Template File by using
  the Replacement Rules. Existing files are skipped unless the user forces overwriting, e.g.
  by using the command line switch '-f', like +tg -f -t cpp create Main+. +tg+ prints out a
  warning for every skipped file.
  
  == Exit Code
  
  +tg+ returns 0 when it generated the templates successfully, even when it skips the
  generation due to existing template files.
  
negative.code: === Template Directory Reference Specification (TDRS)
  
  A 'Template Directory Reference Specification' specifies a location where +tg+ searches for
  'Template Containers'. The reference specification may either be
  
  - a absolute or relative path specification like _../mymksourcetemplates_ or _/opt/etc/mymksourcetemplates_, or
  - a http-URL reference like http://tg.realtime-projects.com/templates. (Link does not work yet, sorry!).
  
  