anchor.diff:      elements and their children.
   
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     ## ECMAScript
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positive.code:     an Attribute Directive.
  
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    ## Binding
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negative.code:   and a few less familiar ones that have unusual or
    unexpected definitions.
  
    [A](#A) [B](#B) [C](#C) [D](#D) [E](#E) [F](#F) [G](#G) [H](#H) [I](#I) 
    [J](#J) [K](#K) [L](#L) [M](#M) [N](#N) [O](#O) [P](#P) [Q](#Q) [R](#R)
    [S](#S) [T](#T) [U](#U) [V](#V) [W](#W) [X](#X) [Y](#Y) [Z](#Z)
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    ## Annotation
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