anchor.diff:              header: h3 Fragments
               .properties
   
  -                - array = group.fragment
  +                - array = group.fragment || []
                   for i in array
                       +defTerm(null, 'Fragment')
                           a(href=i.identifier) #{i.identifier}
                           +linkOrPlain(i.roleLink)
                               |  (#{i.roleLabel})
   
  -                - array = group.namedFragment
  +                - array = group.namedFragment || []
                   for i in array
                       +defTerm(null, 'Named fragment')
                           a(href=i.identifier) #{i.label}
  
positive.code:             header: h3 Technical Data
              .properties
  
                  - array = group.frameSize
                  for i in array
                      +defTerm(i.width + i.unit, 'Width')
                      +defTerm(i.height + i.unit, 'Height')
  
                  - array = group.compression
                  for i in array
                      +defTerm(null, 'Compression')(data-bind='compression')
                          +linkOrPlain(i.compressionLink)
                              | #{i.compressionLabel}
  
                  - array = group.duration
                  for i in array
                      +defTerm(i.duration, 'Duration')
  
                  - array = group.format
                  for i in array
                      +defTerm(null, 'Format')
                          +linkOrPlain(i.formatLink)
                              | #{i.formatLink}
  
                  - array = group.samplingRate
                  for i in array
                      +defTerm(i.samplingRate, 'Sample rate')(data-bind='sampling-rate')
  
                  - array = group.frameRate
                  for i in array
                      +defTerm(i.frameRate, 'Frame rate')
  
                  - array = group.averageBitRate
                  for i in array
                      +defTerm(i.averageBitRate, 'Avg bit rate')
  
                  - array = group.numTracks
                  for i in array
                      +defTerm(i.number, 'Tracks')
                          if i.typeString
                              |  (#{i.typeString})
  
                  - array = group.metadataSource
                  for i in array
                      +defTerm(null, 'Metadata source')
                          +linkOrPlain(i.metadataSource)
  
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}
  