anchor.diff:  		 :licence (get-element "licence" doc)
   		 :author (get-element "author" doc)
   		 :maintainer (get-element "maintainer" doc)
  +		 :creation-time (get-element "creation-time" doc)
  +		 :update-time (get-element "update-time" doc)
   		 :doc doc))
   
   (defun save-library (library)
  
positive.code:     (add-element "licence" (licence library) doc)
      (add-element "author" (author library) doc)
      (add-element "maintainer" (maintainer library) doc)
      (if (doc library)
  	(db.save "libraries" doc)
  	(progn
  
negative.code: 				    (repositories library-version))
  	     :depends-on ,(mapcar #'cldm::print-requirement-to-string 
  				  (dependencies library-version))))
  