anchor.diff:  containers. Again for the other types of containers, the comparison is container
   dependent.
   
  -[classname]#And#and[classname]#Or#:: ((("[classname]#And# (filter)")))
  +[classname]#And# and [classname]#Or#:: ((("[classname]#And# (filter)")))
   ((("[classname]#Or# (filter)")))
   +
   These logical operator filters are composite filters that combine multiple other
  
positive.code: +
  The logical unary operator filter negates which items are passed by the filter
  given as the parameter.
  
  
  
  
  [[datamodel.container.filtered.custom]]
  === Implementing Custom Filters
  
negative.code: the comparison implementation is container dependent, but should correspond to
  the in-memory null check.
  
  [classname]#Equal#, [classname]#Greater#, [classname]#Less#, [classname]#GreaterOrEqual#, and [classname]#LessOrEqual#:: ((("[classname]#Equal# (filter)")))
  ((("[classname]#Greater# (filter)")))
  ((("[classname]#Less# (filter)")))
  ((("[classname]#GreaterOrEqual# (filter)")))
  ((("[classname]#LessOrEqual# (filter)")))
  The comparison filter implementations compare the specified property value to
  the given constant and pass items for which the comparison result is true. The
  comparison operators are included in the abstract [classname]#Compare# class.
  