anchor.diff:  			  "not been executed yet from the rule instance queue, if they cease to be satisfied;"
   			  "if false, rule instances are not removed from the queue even when they cease to be"
   			  "satisfied when adding or removing RDF input.")
  -		  :html ""
   		  (setf (instans-allow-rule-instance-removal-p instans)
   			(cond ((string-equal value "true") t)
   			      ((string-equal value "false") nil)
  
positive.code: 		 (warnings
  		  :options ("--warn-on-errors=BOOL")
  		  :usage ("If true, prints warnings, when FILTER or BIND evaluation causes an error. If false (the default), produces no output.")
  		  :html ""
  		  (cond ((string-equal value "true") (sparql-inform-and-throw-on-errors))
  			((string-equal value "false") (sparql-throw-on-errors))
  			(t (usage))))
  
negative.code: 			  "policy until the queue is empty. Operation \"execute\" is the a synonym to"
  			  "\"execute-repeat-first\". You can use \"event\" as a shorthand form"
  			  "\"add:execute:remove:execute\". The default operations list is \"add:execute\".")
  		  (setf (instans-rdf-operations instans) (parse-colon-separated-values value)))
  		 ;; (queue-execution-policy
  		 ;;  :options ("--queue-execution-policy=POLICY")
  