anchor.diff:              header: h3 Relational Data
               .properties
   
  -                - array = group.relation
  +                - array = group.relation || []
                   for i in array
                       +defTerm(null, 'Relation')
  -                        a(href=i.targetLink) #{i.targetLabel || i.targetLink}
  +                        a(href=i.targetLink) #{i.targetLabel || i.targetLink || i.value}
                           +linkOrPlain(i.typeLink)
                               |  (#{i.typeLabel})
   
  -                - array = group.collection
  +                - array = group.collection || []
                   for i in array
                       +defTerm(null, 'Collection')
                           +linkOrPlain(i.collectionLink)
  -                            | #{i.collectionLabel}
  +                            | #{i.collectionLabel || i.value}
       if fields.distribution
           - group = _.groupBy(fields.distribution, 'propertyName')
           section
               header: h3 Distribution Data
               .properties
   
  -                - array = group.publisher
  +                - array = group.publisher || []
                   for i in array
                       +defTerm(null, 'Publisher')
                           +linkOrPlain(i.publisherLink)
  -                            | #{i.publisherLabel}
  -
  -                - array = group.targetAudience
  +                            | #{i.publisherLabel || i.value}
  +
  +                - array = group.targetAudience || []
                   for i in array
                       +defTerm(null, 'Target audience')
                           +linkOrPlain(i.audienceLink)
  -                            | #{i.audienceLabel}
  +                            | #{i.audienceLabel || i.value}
                           +linkOrPlain(i.classificationSystemLink)
                               |  (#{href=i.classificationSystemLabel})
   
  
positive.code:             header: h3 Fragments
              .properties
  
                  - array = group.fragment
                  for i in array
                      +defTerm(null, 'Fragment')
                          a(href=i.identifier) #{i.identifier}
                          +linkOrPlain(i.roleLink)
                              |  (#{i.roleLabel})
  
                  - array = group.namedFragment
                  for i in array
                      +defTerm(null, 'Named fragment')
                          a(href=i.identifier) #{i.label}
  
negative.code:             header: h3 Identification Data
              .properties
  
                  - array = group.identifier || []
                  for i in array
                      +defTerm(null , 'Identifier')
                          a(href=i.identifierLink) #{i.identifierLink}
  
                  - array = group.title || []
                  for i in array
                      +defTerm(null, 'Title')
                          +linkOrPlain(i.titleLink)
                              |  #{i.titleLabel || i.value}
  
                  - array = group.language || []
                  for i in array
                      +defTerm(null, 'Language')
                          +linkOrPlain(i.languageLink)
                              | #{i.languageLabel || i.value}
  
                  - array = group.locator || []
                  for i in array
                      +defTerm(null, 'Link')
                          a(href="#{i.locatorLink}") #{i.locatorLink}
  