anchor.diff:  
     (unless (find-package "DJULA.FILTERS")
       (defpackage "DJULA.FILTERS"
  +      (:use)
         (:documentation "This package contains the djula filters. Filters are take as
     a first argument a string and return a string.")
         (:export #:date
  
positive.code: 
    (unless (find-package "DJULA.TAG-PROCESSORS")
      (defpackage "DJULA.TAG-PROCESSORS"
        (:documentation "This package contains the tag processors.")
        (:export #:semi-parsed-ifequal
                 #:semi-parsed-filter
  
negative.code: 
    (unless (find-package "DJULA.UNPARSED-TAG-PROCESSORS")
      (defpackage "DJULA.UNPARSED-TAG-PROCESSORS"
        (:use)
        (:documentation "This package contains the unparsed tag processors.")
        (:export #:filter
                 #:set
  