anchor.diff:  svgattr,normal,normal,azimuth,Azimuth
   svgattr,normal,normal,baseFrequency,BaseFrequency
   svgattr,normal,normal,baseline-shift,BaselineShift
  -svgattr,normal,normal,begin,Begin
  +svgattr,normal,keyword,begin,Begin
   svgattr,normal,normal,bias,Bias
   svgattr,normal,normal,calcMode,CalcMode
  -svgattr,normal,normal,class,Class
  +svgattr,normal,keyword,class,Class
   svgattr,normal,normal,clip,Clip
   svgattr,normal,normal,clipPathUnits,ClipPathUnits
   svgattr,normal,normal,clip-path,ClipPath
  
positive.code: svgattr,normal,normal,text-anchor,TextAnchor
  svgattr,normal,normal,text-decoration,TextDecoration
  svgattr,normal,normal,text-rendering,TextRendering
  svgattr,normal,normal,to,To
  svgattr,normal,normal,transform,Transform
  svgattr,normal,keyword,type,Type
  svgattr,normal,normal,values,Values
  
negative.code: svgtag,normal,normal,animatetransform,AnimateTransform
  svgtag,normal,normal,circle,Circle
  svgtag,normal,normal,clippath,ClipPath
  svgtag,normal,normal,color-profile,ColorProfile
  svgtag,normal,normal,cursor,Cursor
  svgtag,normal,normal,defs,Defs
  svgtag,normal,normal,desc,Desc
  