anchor.diff:  typical semantic errors in html files 
   which kbd:[HtmlSC] checker will detect and report.
   
  -[small]#last update {docdate}#
  +[small]#last update {docdate}, build with Asciidoctor {asciidoctor-version}#
   
   toc::[]
   
  
positive.code: 
  
  [[missing-alt-attributes]]
  === Missing Alt-Attributes (in Image-Tags)
negative.code: 
  [[broken-cross-references]]
  === Broken Cross References
  [small]#(synonym: broken internal links)#
  
  Html anchor tags contain href attributes, which denote
  the link-target where the browser shall jump when the appropriate
  link is clicked.
  
  
  Example:
  
  [source,html]
  ----
  <a href="missing">missing link</a>  // <1>
  
  <h1 id="existing">Sample Header</h1> // <2>
  <a href="existing"> jump to the sample header</a> //<3>
  ----
  
  <1> This link tells the browser to jump to a location with `id="missing"` (which is missing in this document...)
  <2> The `id=...` attribute denotes a specific identification for an HTML element.
  <3> This `href`is an existing link target. 
  
  
  
  [[missing-local-resoures]]
  === Missing Local Resources
  TODO
  
  [[broken-external-links]]
  === Broken External Links
  kbd:[HtmlSC] does currently not support external link checking. 
  See https://github.com/aim42/htmlSanityCheck/issues/34[issue #34]
  
  
  [[ambiguous-link-targets]]
  === Ambiguous Link Targets
  TODO
  
  
  [[broken-image-maps]]
  === Broken ImageMaps
  