anchor.diff:          p May be used where Flow Content is expected.
           ul
             li #[code html]
  -          li #[code body]    #[small.o-Textbox.c-Label.c-Label--info Sectioning Root    #[sup: +reference('body-sectioning-root')]]
  -          li #[code section] #[small.o-Textbox.c-Label.c-Label--info Sectioning Content #[sup: +reference('section-sectioning-content')]]
  -          li #[code article] #[small.o-Textbox.c-Label.c-Label--info Sectioning Content #[sup: +reference('article-sectioning-content')]]
  -          li #[code aside]   #[small.o-Textbox.c-Label.c-Label--info Sectioning Content #[sup: +reference('aside-sectioning-content')]]
  -          li #[code nav]     #[small.o-Textbox.c-Label.c-Label--info Sectioning Content #[sup: +reference('nav-sectioning-content')]]
  +          li #[code body]    #[+tag('Sectioning Root','body-sectioning-root')]
  +          li #[code section] #[+tag('Sectioning Content','section-sectioning-content')]
  +          li #[code article] #[+tag('Sectioning Content','article-sectioning-content')]
  +          li #[code aside]   #[+tag('Sectioning Content','aside-sectioning-content')]
  +          li #[code nav]     #[+tag('Sectioning Content','nav-sectioning-content')]
             li #[code main]
             li #[code header]
             li #[code footer]
  -          li #[code h1]&ndash;#[code h6] #[small.o-Textbox.c-Label.c-Label--info Phrasing Content Model #[sup: +reference('hn-phrasing-content-model')]]
  +          li #[code h1]&ndash;#[code h6] #[+tag('Phrasing Content Model','hn-phrasing-content-model')]
             li #[code address] #[sup: +reference('address')]
         section
           h2 Grouping Content
           p May be used where Flow Content is expected.
           ul
  -          li #[code hr] #[small.o-Textbox.c-Label.c-Label--info Nothing Content Model #[sup: +reference('hr-nothing-content-model')]]
  +          li #[code hr] #[+tag('Nothing Content Model','hr-nothing-content-model')]
             li #[code div]
           section
             h3 Paragraph-Like Content
             ul
  -            li #[code p] #[small.o-Textbox.c-Label.c-Label--info Phrasing Content Model #[sup: +reference('p-phrasing-content-model')]]
  -            li #[code figure] #[small.o-Textbox.c-Label.c-Label--info Sectioning Root #[sup: +reference('figure-sectioning-root')]]
  +            li #[code p] #[+tag('Phrasing Content Model','p-phrasing-content-model')]
  +            li #[code figure] #[+tag('Sectioning Root','figure-sectioning-root')]
               li #[code figcaption]
  -            li #[code blockquote] #[small.o-Textbox.c-Label.c-Label--info Sectioning Root #[sup: +reference('blockquote-sectioning-root')]]
  -            li #[code pre] #[small.o-Textbox.c-Label.c-Label--info Phrasing Content Model #[sup: +reference('pre-phrasing-content-model')]]
  +            li #[code blockquote] #[+tag('Sectioning Root','blockquote-sectioning-root')]
  +            li #[code pre] #[+tag('Phrasing Content Model','pre-phrasing-content-model')]
           section
             h3 Lists
             ul
  
positive.code:       a.Rf(id='rf-'+id href='#fn-'+id)= refs.indexOf(id)+1
      mixin footnote(id)
        a.Fn(id='fn-'+id href='#rf-'+id)= refs.indexOf(id)+1
      main.o-GoldenContainer__Content.c-Document(data-status="draft" itemscope="" itemtype="https://schema.org/Article")
        header
          h1(itemprop="name headline") Notes on HTML Elements
  
negative.code:             li #[code table]
              li #[code caption]
              li #[code colgroup]
              li #[code col] #[+tag('Nothing Content Model','col-nothing-content-model')]
              li #[code tbody]
              li #[code thead]
              li #[code tfoot]
              li #[code tr]
              li #[code th] #[sup: +reference('th')]
              li #[code td] #[+tag('Sectioning Root','td-sectioning-root')]
        section
          h2 Text-Level Semantics
          p.
            May be used where Phrasing Content is expected.
            All elements in this section have the Phrasing Content Model unless otherwise specified.
          ul
            li #[code a] &amp; #[code a[href]] #[+tag('Transparent Content Model','a-transparent-content-model')]
            li #[code span]
            li #[code br] #[+tag('Nothing Content Model','br-nothing-content-model')]
            li #[code wbr] #[+tag('Nothing Content Model','wbr-nothing-content-model')]
          section
            h3 Stressed Text
            ul
  