instiki/lib/stringsupport.rb

# Some useful additions to the String class

class String

# Check whether a string is valid utf-8
#
# :call-seq:
#    string.is_utf8?    -> boolean
#
# returns true if the sequence of bytes in string is valid utf-8
#--
   def is_utf8?
     #expand NCRs to utf-8
     text = self.gsub(/&#[xX]([a-fA-F0-9]+);/) { |m| [$1.hex].pack('U*') }
     text.gsub!(/&#(\d+);/) { |m| [$1.to_i].pack('U*') }
     
     # You might think this is faster, but it isn't
     #pieces = self.split(/&#[xX]([a-fA-F0-9]+);/)
     #1.step(pieces.length-1, 2) {|i| pieces[i] = [pieces[i].hex].pack('U*')}
     #pieces = pieces.join.split(/&#(\d+);/)
     #1.step(pieces.length-1, 2) {|i| pieces[i] = [pieces[i].to_i].pack('U*')}
     #text = pieces.join
          
     #ensure the resulting string of bytes is valid utf-8
     text =~  /\A(
         [\x09\x0A\x0D\x20-\x7E]            # ASCII
       | [\xC2-\xDF][\x80-\xBF]             # non-overlong 2-byte
       |  \xE0[\xA0-\xBF][\x80-\xBF]        # excluding overlongs
       | [\xE1-\xEC\xEE][\x80-\xBF]{2}      # straight 3-byte
       |  \xEF[\x80-\xBE]{2}                # 
       |  \xEF\xBF[\x80-\xBD]               # excluding U+fffe and U+ffff
       |  \xED[\x80-\x9F][\x80-\xBF]        # excluding surrogates
       |  \xF0[\x90-\xBF][\x80-\xBF]{2}     # planes 1-3
       | [\xF1-\xF3][\x80-\xBF]{3}          # planes 4-15
       |  \xF4[\x80-\x8F][\x80-\xBF]{2}     # plane 16
     )*\Z/nx;
   end
#++

  def purify
    delete("\x01-\x08\x0B\x0C\x0E-\x1F", "\ufffe\uffff") 
  end
#:stopdoc: 
  MATHML_ENTITIES = {
	'Alpha' => 'Α',
	'Beta' => 'Β',
	'Epsilon' => 'Ε',
	'Zeta' => 'Ζ',
	'Eta' => 'Η',
	'Iota' => 'Ι',
	'Kappa' => 'Κ',
	'Mu' => 'Μ',
	'Nu' => 'Ν',
	'Omicron' => 'Ο',
	'Rho' => 'Ρ',
	'Tau' => 'Τ',
	'Chi' => 'Χ',
	'epsilon' => 'ε',
	'zeta' => 'ζ',
	'omicron' => 'ο',
	'sigmaf' => 'ς',
	'thetasym' => 'ϑ',
	'upsih' => 'ϒ',
	'oline' => '‾',
	'frasl' => '⁄',
	'alefsym' => 'ℵ',
	'crarr' => '↵',
	'empty' => '∅',
	'amp' => '&',
	'lt' => '<',
	'zwnj' => '‌',
	'zwj' => '‍',
	'lrm' => '‎',
	'rlm' => '‏',
	'sbquo' => '‚',
	'bdquo' => '„',
	'lsaquo' => '‹',
	'rsaquo' => '›',
	'euro' => '€',
	'angzarr' => '⍼',
	'cirmid' => '⫯',
	'cudarrl' => '⤸',
	'cudarrr' => '⤵',
	'cularr' => '↶',
	'cularrp' => '⤽',
	'curarr' => '↷',
	'curarrm' => '⤼',
	'Darr' => '↡',
	'dArr' => '⇓',
	'ddarr' => '⇊',
	'DDotrahd' => '⤑',
	'dfisht' => '⥿',
	'dHar' => '⥥',
	'dharl' => '⇃',
	'dharr' => '⇂',
	'duarr' => '⇵',
	'duhar' => '⥯',
	'dzigrarr' => '⟿',
	'erarr' => '⥱',
	'hArr' => '⇔',
	'harr' => '↔',
	'harrcir' => '⥈',
	'harrw' => '↭',
	'hoarr' => '⇿',
	'imof' => '⊷',
	'lAarr' => '⇚',
	'Larr' => '↞',
	'larrbfs' => '⤟',
	'larrfs' => '⤝',
	'larrhk' => '↩',
	'larrlp' => '↫',
	'larrpl' => '⤹',
	'larrsim' => '⥳',
	'larrtl' => '↢',
	'lAtail' => '⤛',
	'latail' => '⤙',
	'lBarr' => '⤎',
	'lbarr' => '⤌',
	'ldca' => '⤶',
	'ldrdhar' => '⥧',
	'ldrushar' => '⥋',
	'ldsh' => '↲',
	'lfisht' => '⥼',
	'lHar' => '⥢',
	'lhard' => '↽',
	'lharu' => '↼',
	'lharul' => '⥪',
	'llarr' => '⇇',
	'llhard' => '⥫',
	'loarr' => '⇽',
	'lrarr' => '⇆',
	'lrhar' => '⇋',
	'lrhard' => '⥭',
	'lsh' => '↰',
	'lurdshar' => '⥊',
	'luruhar' => '⥦',
	'Map' => '⤅',
	'map' => '↦',
	'midcir' => '⫰',
	'mumap' => '⊸',
	'nearhk' => '⤤',
	'neArr' => '⇗',
	'nearr' => '↗',
	'nesear' => '⤨',
	'nhArr' => '⇎',
	'nharr' => '↮',
	'nlArr' => '⇍',
	'nlarr' => '↚',
	'nrArr' => '⇏',
	'nrarr' => '↛',
	'nrarrc' => '⤳̸',
	'nrarrw' => '↝̸',
	'nvHarr' => '⤄',
	'nvlArr' => '⤂',
	'nvrArr' => '⤃',
	'nwarhk' => '⤣',
	'nwArr' => '⇖',
	'nwarr' => '↖',
	'nwnear' => '⤧',
	'olarr' => '↺',
	'orarr' => '↻',
	'origof' => '⊶',
	'rAarr' => '⇛',
	'Rarr' => '↠',
	'rarrap' => '⥵',
	'rarrbfs' => '⤠',
	'rarrc' => '⤳',
	'rarrfs' => '⤞',
	'rarrhk' => '↪',
	'rarrlp' => '↬',
	'rarrpl' => '⥅',
	'rarrsim' => '⥴',
	'Rarrtl' => '⤖',
	'rarrtl' => '↣',
	'rarrw' => '↝',
	'rAtail' => '⤜',
	'ratail' => '⤚',
	'RBarr' => '⤐',
	'rBarr' => '⤏',
	'rbarr' => '⤍',
	'rdca' => '⤷',
	'rdldhar' => '⥩',
	'rdsh' => '↳',
	'rfisht' => '⥽',
	'rHar' => '⥤',
	'rhard' => '⇁',
	'rharu' => '⇀',
	'rharul' => '⥬',
	'rlarr' => '⇄',
	'rlhar' => '⇌',
	'roarr' => '⇾',
	'rrarr' => '⇉',
	'rsh' => '↱',
	'ruluhar' => '⥨',
	'searhk' => '⤥',
	'seArr' => '⇘',
	'searr' => '↘',
	'seswar' => '⤩',
	'simrarr' => '⥲',
	'slarr' => '←',
	'srarr' => '→',
	'swarhk' => '⤦',
	'swArr' => '⇙',
	'swarr' => '↙',
	'swnwar' => '⤪',
	'Uarr' => '↟',
	'uArr' => '⇑',
	'Uarrocir' => '⥉',
	'udarr' => '⇅',
	'udhar' => '⥮',
	'ufisht' => '⥾',
	'uHar' => '⥣',
	'uharl' => '↿',
	'uharr' => '↾',
	'uuarr' => '⇈',
	'vArr' => '⇕',
	'varr' => '↕',
	'xhArr' => '⟺',
	'xharr' => '⟷',
	'xlArr' => '⟸',
	'xlarr' => '⟵',
	'xmap' => '⟼',
	'xrArr' => '⟹',
	'xrarr' => '⟶',
	'zigrarr' => '⇝',
	'ac' => '∾',
	'acE' => '∾̳',
	'amalg' => '⨿',
	'barvee' => '⊽',
	'Barwed' => '⌆',
	'barwed' => '⌅',
	'bsolb' => '⧅',
	'Cap' => '⋒',
	'capand' => '⩄',
	'capbrcup' => '⩉',
	'capcap' => '⩋',
	'capcup' => '⩇',
	'capdot' => '⩀',
	'caps' => '∩︀',
	'ccaps' => '⩍',
	'ccups' => '⩌',
	'ccupssm' => '⩐',
	'coprod' => '∐',
	'Cup' => '⋓',
	'cupbrcap' => '⩈',
	'cupcap' => '⩆',
	'cupcup' => '⩊',
	'cupdot' => '⊍',
	'cupor' => '⩅',
	'cups' => '∪︀',
	'cuvee' => '⋎',
	'cuwed' => '⋏',
	'Dagger' => '‡',
	'dagger' => '†',
	'diam' => '⋄',
	'divonx' => '⋇',
	'eplus' => '⩱',
	'hercon' => '⊹',
	'intcal' => '⊺',
	'iprod' => '⨼',
	'loplus' => '⨭',
	'lotimes' => '⨴',
	'lthree' => '⋋',
	'ltimes' => '⋉',
	'midast' => '*',
	'minusb' => '⊟',
	'minusd' => '∸',
	'minusdu' => '⨪',
	'ncap' => '⩃',
	'ncup' => '⩂',
	'oast' => '⊛',
	'ocir' => '⊚',
	'odash' => '⊝',
	'odiv' => '⨸',
	'odot' => '⊙',
	'odsold' => '⦼',
	'ofcir' => '⦿',
	'ogt' => '⧁',
	'ohbar' => '⦵',
	'olcir' => '⦾',
	'olt' => '⧀',
	'omid' => '⦶',
	'ominus' => '⊖',
	'opar' => '⦷',
	'operp' => '⦹',
	'oplus' => '⊕',
	'osol' => '⊘',
	'Otimes' => '⨷',
	'otimes' => '⊗',
	'otimesas' => '⨶',
	'ovbar' => '⌽',
	'plusacir' => '⨣',
	'plusb' => '⊞',
	'pluscir' => '⨢',
	'plusdo' => '∔',
	'plusdu' => '⨥',
	'pluse' => '⩲',
	'plussim' => '⨦',
	'plustwo' => '⨧',
	'prod' => '∏',
	'race' => '⧚',
	'roplus' => '⨮',
	'rotimes' => '⨵',
	'rthree' => '⋌',
	'rtimes' => '⋊',
	'sdot' => '⋅',
	'sdotb' => '⊡',
	'setmn' => '∖',
	'simplus' => '⨤',
	'smashp' => '⨳',
	'solb' => '⧄',
	'sqcap' => '⊓',
	'sqcaps' => '⊓︀',
	'sqcup' => '⊔',
	'sqcups' => '⊔︀',
	'ssetmn' => '∖',
	'sstarf' => '⋆',
	'subdot' => '⪽',
	'sum' => '∑',
	'supdot' => '⪾',
	'timesb' => '⊠',
	'timesbar' => '⨱',
	'timesd' => '⨰',
	'tridot' => '◬',
	'triminus' => '⨺',
	'triplus' => '⨹',
	'trisb' => '⧍',
	'tritime' => '⨻',
	'uplus' => '⊎',
	'veebar' => '⊻',
	'wedbar' => '⩟',
	'wreath' => '≀',
	'xcap' => '⋂',
	'xcirc' => '◯',
	'xcup' => '⋃',
	'xdtri' => '▽',
	'xodot' => '⨀',
	'xoplus' => '⨁',
	'xotime' => '⨂',
	'xsqcup' => '⨆',
	'xuplus' => '⨄',
	'xutri' => '△',
	'xvee' => '⋁',
	'xwedge' => '⋀',
	'dlcorn' => '⌞',
	'drcorn' => '⌟',
	'gtlPar' => '⦕',
	'langd' => '⦑',
	'lbrke' => '⦋',
	'lbrksld' => '⦏',
	'lbrkslu' => '⦍',
	'lceil' => '⌈',
	'lfloor' => '⌊',
	'lmoust' => '⎰',
	'lparlt' => '⦓',
	'ltrPar' => '⦖',
	'rangd' => '⦒',
	'rbrke' => '⦌',
	'rbrksld' => '⦎',
	'rbrkslu' => '⦐',
	'rceil' => '⌉',
	'rfloor' => '⌋',
	'rmoust' => '⎱',
	'rpargt' => '⦔',
	'ulcorn' => '⌜',
	'urcorn' => '⌝',
	'gnap' => '⪊',
	'gnE' => '≩',
	'gne' => '⪈',
	'gnsim' => '⋧',
	'gvnE' => '≩︀',
	'lnap' => '⪉',
	'lnE' => '≨',
	'lne' => '⪇',
	'lnsim' => '⋦',
	'lvnE' => '≨︀',
	'nap' => '≉',
	'napE' => '⩰̸',
	'napid' => '≋̸',
	'ncong' => '≇',
	'ncongdot' => '⩭̸',
	'nequiv' => '≢',
	'ngE' => '≧̸',
	'nge' => '≱',
	'nges' => '⩾̸',
	'nGg' => '⋙̸',
	'ngsim' => '≵',
	'nGt' => '≫⃒',
	'ngt' => '≯',
	'nGtv' => '≫̸',
	'nlE' => '≦̸',
	'nle' => '≰',
	'nles' => '⩽̸',
	'nLl' => '⋘̸',
	'nlsim' => '≴',
	'nLt' => '≪⃒',
	'nlt' => '≮',
	'nltri' => '⋪',
	'nltrie' => '⋬',
	'nLtv' => '≪̸',
	'nmid' => '∤',
	'npar' => '∦',
	'npr' => '⊀',
	'nprcue' => '⋠',
	'npre' => '⪯̸',
	'nrtri' => '⋫',
	'nrtrie' => '⋭',
	'nsc' => '⊁',
	'nsccue' => '⋡',
	'nsce' => '⪰̸',
	'nsim' => '≁',
	'nsime' => '≄',
	'nsmid' => '∤',
	'nspar' => '∦',
	'nsqsube' => '⋢',
	'nsqsupe' => '⋣',
	'nsub' => '⊄',
	'nsubE' => '⫅̸',
	'nsube' => '⊈',
	'nsup' => '⊅',
	'nsupE' => '⫆̸',
	'nsupe' => '⊉',
	'ntgl' => '≹',
	'ntlg' => '≸',
	'nvap' => '≍⃒',
	'nVDash' => '⊯',
	'nVdash' => '⊮',
	'nvDash' => '⊭',
	'nvdash' => '⊬',
	'nvge' => '≥⃒',
	'nvgt' => '>⃒',
	'nvle' => '≤⃒',
	'nvltrie' => '⊴⃒',
	'nvrtrie' => '⊵⃒',
	'nvsim' => '∼⃒',
	'parsim' => '⫳',
	'prnap' => '⪹',
	'prnE' => '⪵',
	'prnsim' => '⋨',
	'rnmid' => '⫮',
	'scnap' => '⪺',
	'scnE' => '⪶',
	'scnsim' => '⋩',
	'simne' => '≆',
	'solbar' => '⌿',
	'subnE' => '⫋',
	'subne' => '⊊',
	'supnE' => '⫌',
	'supne' => '⊋',
	'vnsub' => '⊂⃒',
	'vnsup' => '⊃⃒',
	'vsubnE' => '⫋︀',
	'vsubne' => '⊊︀',
	'vsupnE' => '⫌︀',
	'vsupne' => '⊋︀',
	'ang' => '∠',
	'ange' => '⦤',
	'angmsd' => '∡',
	'angmsdaa' => '⦨',
	'angmsdab' => '⦩',
	'angmsdac' => '⦪',
	'angmsdad' => '⦫',
	'angmsdae' => '⦬',
	'angmsdaf' => '⦭',
	'angmsdag' => '⦮',
	'angmsdah' => '⦯',
	'angrtvb' => '⊾',
	'angrtvbd' => '⦝',
	'bbrk' => '⎵',
	'bbrktbrk' => '⎶',
	'bemptyv' => '⦰',
	'beth' => 'ℶ',
	'boxbox' => '⧉',
	'bprime' => '‵',
	'bsemi' => '⁏',
	'cemptyv' => '⦲',
	'cirE' => '⧃',
	'cirscir' => '⧂',
	'comp' => '∁',
	'daleth' => 'ℸ',
	'demptyv' => '⦱',
	'ell' => 'ℓ',
	'empty' => '∅',
	'emptyv' => '∅',
	'gimel' => 'ℷ',
	'iiota' => '℩',
	'image' => 'ℑ',
	'imath' => 'ı',
	'jmath' => 'j',
	'laemptyv' => '⦴',
	'lltri' => '◺',
	'lrtri' => '⊿',
	'mho' => '℧',
	'nang' => '∠⃒',
	'nexist' => '∄',
	'oS' => 'Ⓢ',
	'planck' => 'ℏ',
	'plankv' => 'ℏ',
	'raemptyv' => '⦳',
	'range' => '⦥',
	'real' => 'ℜ',
	'tbrk' => '⎴',
	'trpezium' => '�',
	'ultri' => '◸',
	'urtri' => '◹',
	'vzigzag' => '⦚',
	'weierp' => '℘',
	'apE' => '⩰',
	'ape' => '≊',
	'apid' => '≋',
	'asymp' => '≈',
	'Barv' => '⫧',
	'bcong' => '≌',
	'bepsi' => '϶',
	'bowtie' => '⋈',
	'bsim' => '∽',
	'bsime' => '⋍',
	'bsolhsub' => '\⊂',
	'bump' => '≎',
	'bumpE' => '⪮',
	'bumpe' => '≏',
	'cire' => '≗',
	'Colon' => '∷',
	'Colone' => '⩴',
	'colone' => '≔',
	'congdot' => '⩭',
	'csub' => '⫏',
	'csube' => '⫑',
	'csup' => '⫐',
	'csupe' => '⫒',
	'cuepr' => '⋞',
	'cuesc' => '⋟',
	'Dashv' => '⫤',
	'dashv' => '⊣',
	'easter' => '⩮',
	'ecir' => '≖',
	'ecolon' => '≕',
	'eDDot' => '⩷',
	'eDot' => '≑',
	'efDot' => '≒',
	'eg' => '⪚',
	'egs' => '⪖',
	'egsdot' => '⪘',
	'el' => '⪙',
	'els' => '⪕',
	'elsdot' => '⪗',
	'equest' => '≟',
	'equivDD' => '⩸',
	'erDot' => '≓',
	'esdot' => '≐',
	'Esim' => '⩳',
	'esim' => '≂',
	'fork' => '⋔',
	'forkv' => '⫙',
	'frown' => '⌢',
	'gap' => '⪆',
	'gE' => '≧',
	'gEl' => '⪌',
	'gel' => '⋛',
	'ges' => '⩾',
	'gescc' => '⪩',
	'gesdot' => '⪀',
	'gesdoto' => '⪂',
	'gesdotol' => '⪄',
	'gesl' => '⋛︀',
	'gesles' => '⪔',
	'Gg' => '⋙',
	'gl' => '≷',
	'gla' => '⪥',
	'glE' => '⪒',
	'glj' => '⪤',
	'gsim' => '≳',
	'gsime' => '⪎',
	'gsiml' => '⪐',
	'Gt' => '≫',
	'gtcc' => '⪧',
	'gtcir' => '⩺',
	'gtdot' => '⋗',
	'gtquest' => '⩼',
	'gtrarr' => '⥸',
	'homtht' => '∻',
	'lap' => '⪅',
	'lat' => '⪫',
	'late' => '⪭',
	'lates' => '⪭︀',
	'lE' => '≦',
	'lEg' => '⪋',
	'leg' => '⋚',
	'les' => '⩽',
	'lescc' => '⪨',
	'lesdot' => '⩿',
	'lesdoto' => '⪁',
	'lesdotor' => '⪃',
	'lesg' => '⋚︀',
	'lesges' => '⪓',
	'lg' => '≶',
	'lgE' => '⪑',
	'Ll' => '⋘',
	'lsim' => '≲',
	'lsime' => '⪍',
	'lsimg' => '⪏',
	'Lt' => '≪',
	'ltcc' => '⪦',
	'ltcir' => '⩹',
	'ltdot' => '⋖',
	'ltlarr' => '⥶',
	'ltquest' => '⩻',
	'ltrie' => '⊴',
	'mcomma' => '⨩',
	'mDDot' => '∺',
	'mid' => '∣',
	'mlcp' => '⫛',
	'models' => '⊧',
	'mstpos' => '∾',
	'Pr' => '⪻',
	'pr' => '≺',
	'prap' => '⪷',
	'prcue' => '≼',
	'prE' => '⪳',
	'pre' => '⪯',
	'prsim' => '≾',
	'prurel' => '⊰',
	'ratio' => '∶',
	'rtrie' => '⊵',
	'rtriltri' => '⧎',
	'Sc' => '⪼',
	'sc' => '≻',
	'scap' => '⪸',
	'sccue' => '≽',
	'scE' => '⪴',
	'sce' => '⪰',
	'scsim' => '≿',
	'sdote' => '⩦',
	'sfrown' => '⌢',
	'simg' => '⪞',
	'simgE' => '⪠',
	'siml' => '⪝',
	'simlE' => '⪟',
	'smid' => '∣',
	'smile' => '⌣',
	'smt' => '⪪',
	'smte' => '⪬',
	'smtes' => '⪬︀',
	'spar' => '∥',
	'sqsub' => '⊏',
	'sqsube' => '⊑',
	'sqsup' => '⊐',
	'sqsupe' => '⊒',
	'ssmile' => '⌣',
	'Sub' => '⋐',
	'subE' => '⫅',
	'subedot' => '⫃',
	'submult' => '⫁',
	'subplus' => '⪿',
	'subrarr' => '⥹',
	'subsim' => '⫇',
	'subsub' => '⫕',
	'subsup' => '⫓',
	'Sup' => '⋑',
	'supdsub' => '⫘',
	'supE' => '⫆',
	'supedot' => '⫄',
	'suphsol' => '⊃/',
	'suphsub' => '⫗',
	'suplarr' => '⥻',
	'supmult' => '⫂',
	'supplus' => '⫀',
	'supsim' => '⫈',
	'supsub' => '⫔',
	'supsup' => '⫖',
	'thkap' => '≈',
	'thksim' => '∼',
	'topfork' => '⫚',
	'trie' => '≜',
	'twixt' => '≬',
	'Vbar' => '⫫',
	'vBar' => '⫨',
	'vBarv' => '⫩',
	'VDash' => '⊫',
	'Vdash' => '⊩',
	'vDash' => '⊨',
	'vdash' => '⊢',
	'Vdashl' => '⫦',
	'vltri' => '⊲',
	'vprop' => '∝',
	'vrtri' => '⊳',
	'Vvdash' => '⊪',
	'alpha' => 'α',
	'beta' => 'β',
	'chi' => 'χ',
	'Delta' => 'Δ',
	'delta' => 'δ',
	'epsi' => 'ϵ',
	'epsiv' => 'ε',
	'eta' => 'η',
	'Gamma' => 'Γ',
	'gamma' => 'γ',
	'Gammad' => 'Ϝ',
	'gammad' => 'ϝ',
	'iota' => 'ι',
	'kappa' => 'κ',
	'kappav' => 'ϰ',
	'Lambda' => 'Λ',
	'lambda' => 'λ',
	'mu' => 'μ',
	'nu' => 'ν',
	'Omega' => 'Ω',
	'omega' => 'ω',
	'Phi' => 'Φ',
	'phi' => 'ϕ',
	'phiv' => 'φ',
	'Pi' => 'Π',
	'pi' => 'π',
	'piv' => 'ϖ',
	'Psi' => 'Ψ',
	'psi' => 'ψ',
	'rho' => 'ρ',
	'rhov' => 'ϱ',
	'Sigma' => 'Σ',
	'sigma' => 'σ',
	'sigmav' => 'ς',
	'tau' => 'τ',
	'Theta' => 'Θ',
	'theta' => 'θ',
	'thetav' => 'ϑ',
	'Upsi' => 'ϒ',
	'upsi' => 'υ',
	'Xi' => 'Ξ',
	'xi' => 'ξ',
	'zeta' => 'ζ',
	'Afr' => '𝔄',
	'afr' => '𝔞',
	'Bfr' => '𝔅',
	'bfr' => '𝔟',
	'Cfr' => 'ℭ',
	'cfr' => '𝔠',
	'Dfr' => '𝔇',
	'dfr' => '𝔡',
	'Efr' => '𝔈',
	'efr' => '𝔢',
	'Ffr' => '𝔉',
	'ffr' => '𝔣',
	'Gfr' => '𝔊',
	'gfr' => '𝔤',
	'Hfr' => 'ℌ',
	'hfr' => '𝔥',
	'Ifr' => 'ℑ',
	'ifr' => '𝔦',
	'Jfr' => '𝔍',
	'jfr' => '𝔧',
	'Kfr' => '𝔎',
	'kfr' => '𝔨',
	'Lfr' => '𝔏',
	'lfr' => '𝔩',
	'Mfr' => '𝔐',
	'mfr' => '𝔪',
	'Nfr' => '𝔑',
	'nfr' => '𝔫',
	'Ofr' => '𝔒',
	'ofr' => '𝔬',
	'Pfr' => '𝔓',
	'pfr' => '𝔭',
	'Qfr' => '𝔔',
	'qfr' => '𝔮',
	'Rfr' => 'ℜ',
	'rfr' => '𝔯',
	'Sfr' => '𝔖',
	'sfr' => '𝔰',
	'Tfr' => '𝔗',
	'tfr' => '𝔱',
	'Ufr' => '𝔘',
	'ufr' => '𝔲',
	'Vfr' => '𝔙',
	'vfr' => '𝔳',
	'Wfr' => '𝔚',
	'wfr' => '𝔴',
	'Xfr' => '𝔛',
	'xfr' => '𝔵',
	'Yfr' => '𝔜',
	'yfr' => '𝔶',
	'Zfr' => 'ℨ',
	'zfr' => '𝔷',
	'Aopf' => '𝔸',
	'Bopf' => '𝔹',
	'Copf' => 'ℂ',
	'Dopf' => '𝔻',
	'Eopf' => '𝔼',
	'Fopf' => '𝔽',
	'Gopf' => '𝔾',
	'Hopf' => 'ℍ',
	'Iopf' => '𝕀',
	'Jopf' => '𝕁',
	'Kopf' => '𝕂',
	'Lopf' => '𝕃',
	'Mopf' => '𝕄',
	'Nopf' => 'ℕ',
	'Oopf' => '𝕆',
	'Popf' => 'ℙ',
	'Qopf' => 'ℚ',
	'Ropf' => 'ℝ',
	'Sopf' => '𝕊',
	'Topf' => '𝕋',
	'Uopf' => '𝕌',
	'Vopf' => '𝕍',
	'Wopf' => '𝕎',
	'Xopf' => '𝕏',
	'Yopf' => '𝕐',
	'Zopf' => 'ℤ',
	'Ascr' => '𝒜',
	'ascr' => '𝒶',
	'Bscr' => 'ℬ',
	'bscr' => '𝒷',
	'Cscr' => '𝒞',
	'cscr' => '𝒸',
	'Dscr' => '𝒟',
	'dscr' => '𝒹',
	'Escr' => 'ℰ',
	'escr' => 'ℯ',
	'Fscr' => 'ℱ',
	'fscr' => '𝒻',
	'Gscr' => '𝒢',
	'gscr' => 'ℊ',
	'Hscr' => 'ℋ',
	'hscr' => '𝒽',
	'Iscr' => 'ℐ',
	'iscr' => '𝒾',
	'Jscr' => '𝒥',
	'jscr' => '𝒿',
	'Kscr' => '𝒦',
	'kscr' => '𝓀',
	'Lscr' => 'ℒ',
	'lscr' => '𝓁',
	'Mscr' => 'ℳ',
	'mscr' => '𝓂',
	'Nscr' => '𝒩',
	'nscr' => '𝓃',
	'Oscr' => '𝒪',
	'oscr' => 'ℴ',
	'Pscr' => '𝒫',
	'pscr' => '𝓅',
	'Qscr' => '𝒬',
	'qscr' => '𝓆',
	'Rscr' => 'ℛ',
	'rscr' => '𝓇',
	'Sscr' => '𝒮',
	'sscr' => '𝓈',
	'Tscr' => '𝒯',
	'tscr' => '𝓉',
	'Uscr' => '𝒰',
	'uscr' => '𝓊',
	'Vscr' => '𝒱',
	'vscr' => '𝓋',
	'Wscr' => '𝒲',
	'wscr' => '𝓌',
	'Xscr' => '𝒳',
	'xscr' => '𝓍',
	'Yscr' => '𝒴',
	'yscr' => '𝓎',
	'Zscr' => '𝒵',
	'zscr' => '𝓏',
	'acd' => '∿',
	'aleph' => 'ℵ',
	'And' => '⩓',
	'and' => '∧',
	'andand' => '⩕',
	'andd' => '⩜',
	'andslope' => '⩘',
	'andv' => '⩚',
	'angrt' => '∟',
	'angsph' => '∢',
	'angst' => 'Å',
	'ap' => '≈',
	'apacir' => '⩯',
	'awconint' => '∳',
	'awint' => '⨑',
	'becaus' => '∵',
	'bernou' => 'ℬ',
	'bne' => '=⃥',
	'bnequiv' => '≡⃥',
	'bNot' => '⫭',
	'bnot' => '⌐',
	'bottom' => '⊥',
	'cap' => '∩',
	'Cconint' => '∰',
	'cirfnint' => '⨐',
	'compfn' => '∘',
	'cong' => '≅',
	'Conint' => '∯',
	'conint' => '∮',
	'ctdot' => '⋯',
	'cup' => '∪',
	'cwconint' => '∲',
	'cwint' => '∱',
	'cylcty' => '⌭',
	'disin' => '⋲',
	'Dot' => '¨',
	'DotDot' => '⃜',
	'dsol' => '⧶',
	'dtdot' => '⋱',
	'dwangle' => '⦦',
	'elinters' => '�',
	'epar' => '⋕',
	'eparsl' => '⧣',
	'equiv' => '≡',
	'eqvparsl' => '⧥',
	'exist' => '∃',
	'fltns' => '▱',
	'fnof' => 'ƒ',
	'forall' => '∀',
	'fpartint' => '⨍',
	'ge' => '≥',
	'hamilt' => 'ℋ',
	'iff' => '⇔',
	'iinfin' => '⧜',
	'imped' => 'Ƶ',
	'infin' => '∞',
	'infintie' => '⧝',
	'Int' => '∬',
	'int' => '∫',
	'intlarhk' => '⨗',
	'isin' => '∈',
	'isindot' => '⋵',
	'isinE' => '⋹',
	'isins' => '⋴',
	'isinsv' => '⋳',
	'isinv' => '∈',
	'lagran' => 'ℒ',
	'Lang' => '《',
	'lang' => '〈',
	'lArr' => '⇐',
	'lbbrk' => '〔',
	'le' => '≤',
	'loang' => '〘',
	'lobrk' => '〚',
	'lopar' => '⦅',
	'lowast' => '∗',
	'minus' => '−',
	'mnplus' => '∓',
	'nabla' => '∇',
	'ne' => '≠',
	'nedot' => '≐̸',
	'nhpar' => '⫲',
	'ni' => '∋',
	'nis' => '⋼',
	'nisd' => '⋺',
	'niv' => '∋',
	'Not' => '⫬',
	'notin' => '∉',
	'notindot' => '⋵̸',
	'notinE' => '⋹̸',
	'notinva' => '∉',
	'notinvb' => '⋷',
	'notinvc' => '⋶',
	'notni' => '∌',
	'notniva' => '∌',
	'notnivb' => '⋾',
	'notnivc' => '⋽',
	'nparsl' => '⫽⃥',
	'npart' => '∂̸',
	'npolint' => '⨔',
	'nvinfin' => '⧞',
	'olcross' => '⦻',
	'Or' => '⩔',
	'or' => '∨',
	'ord' => '⩝',
	'order' => 'ℴ',
	'oror' => '⩖',
	'orslope' => '⩗',
	'orv' => '⩛',
	'par' => '∥',
	'parsl' => '⫽',
	'part' => '∂',
	'permil' => '‰',
	'perp' => '⊥',
	'pertenk' => '‱',
	'phmmat' => 'ℳ',
	'pointint' => '⨕',
	'Prime' => '″',
	'prime' => '′',
	'profalar' => '⌮',
	'profline' => '⌒',
	'profsurf' => '⌓',
	'prop' => '∝',
	'qint' => '⨌',
	'qprime' => '⁗',
	'quatint' => '⨖',
	'radic' => '√',
	'Rang' => '》',
	'rang' => '〉',
	'rArr' => '⇒',
	'rbbrk' => '〕',
	'roang' => '〙',
	'robrk' => '〛',
	'ropar' => '⦆',
	'rppolint' => '⨒',
	'scpolint' => '⨓',
	'sim' => '∼',
	'simdot' => '⩪',
	'sime' => '≃',
	'smeparsl' => '⧤',
	'square' => '□',
	'squarf' => '▪',
	'strns' => '¯',
	'sub' => '⊂',
	'sube' => '⊆',
	'sup' => '⊃',
	'supe' => '⊇',
	'tdot' => '⃛',
	'there4' => '∴',
	'tint' => '∭',
	'top' => '⊤',
	'topbot' => '⌶',
	'topcir' => '⫱',
	'tprime' => '‴',
	'utdot' => '⋰',
	'uwangle' => '⦧',
	'vangrt' => '⦜',
	'veeeq' => '≚',
	'Verbar' => '‖',
	'wedgeq' => '≙',
	'xnis' => '⋻',
	'boxDL' => '╗',
	'boxDl' => '╖',
	'boxdL' => '╕',
	'boxdl' => '┐',
	'boxDR' => '╔',
	'boxDr' => '╓',
	'boxdR' => '╒',
	'boxdr' => '┌',
	'boxH' => '═',
	'boxh' => '─',
	'boxHD' => '╦',
	'boxHd' => '╤',
	'boxhD' => '╥',
	'boxhd' => '┬',
	'boxHU' => '╩',
	'boxHu' => '╧',
	'boxhU' => '╨',
	'boxhu' => '┴',
	'boxUL' => '╝',
	'boxUl' => '╜',
	'boxuL' => '╛',
	'boxul' => '┘',
	'boxUR' => '╚',
	'boxUr' => '╙',
	'boxuR' => '╘',
	'boxur' => '└',
	'boxV' => '║',
	'boxv' => '│',
	'boxVH' => '╬',
	'boxVh' => '╫',
	'boxvH' => '╪',
	'boxvh' => '┼',
	'boxVL' => '╣',
	'boxVl' => '╢',
	'boxvL' => '╡',
	'boxvl' => '┤',
	'boxVR' => '╠',
	'boxVr' => '╟',
	'boxvR' => '╞',
	'boxvr' => '├',
	'Acy' => 'А',
	'acy' => 'а',
	'Bcy' => 'Б',
	'bcy' => 'б',
	'CHcy' => 'Ч',
	'chcy' => 'ч',
	'Dcy' => 'Д',
	'dcy' => 'д',
	'Ecy' => 'Э',
	'ecy' => 'э',
	'Fcy' => 'Ф',
	'fcy' => 'ф',
	'Gcy' => 'Г',
	'gcy' => 'г',
	'HARDcy' => 'Ъ',
	'hardcy' => 'ъ',
	'Icy' => 'И',
	'icy' => 'и',
	'IEcy' => 'Е',
	'iecy' => 'е',
	'IOcy' => 'Ё',
	'iocy' => 'ё',
	'Jcy' => 'Й',
	'jcy' => 'й',
	'Kcy' => 'К',
	'kcy' => 'к',
	'KHcy' => 'Х',
	'khcy' => 'х',
	'Lcy' => 'Л',
	'lcy' => 'л',
	'Mcy' => 'М',
	'mcy' => 'м',
	'Ncy' => 'Н',
	'ncy' => 'н',
	'numero' => '№',
	'Ocy' => 'О',
	'ocy' => 'о',
	'Pcy' => 'П',
	'pcy' => 'п',
	'Rcy' => 'Р',
	'rcy' => 'р',
	'Scy' => 'С',
	'scy' => 'с',
	'SHCHcy' => 'Щ',
	'shchcy' => 'щ',
	'SHcy' => 'Ш',
	'shcy' => 'ш',
	'SOFTcy' => 'Ь',
	'softcy' => 'ь',
	'Tcy' => 'Т',
	'tcy' => 'т',
	'TScy' => 'Ц',
	'tscy' => 'ц',
	'Ucy' => 'У',
	'ucy' => 'у',
	'Vcy' => 'В',
	'vcy' => 'в',
	'YAcy' => 'Я',
	'yacy' => 'я',
	'Ycy' => 'Ы',
	'ycy' => 'ы',
	'YUcy' => 'Ю',
	'yucy' => 'ю',
	'Zcy' => 'З',
	'zcy' => 'з',
	'ZHcy' => 'Ж',
	'zhcy' => 'ж',
	'DJcy' => 'Ђ',
	'djcy' => 'ђ',
	'DScy' => 'Ѕ',
	'dscy' => 'ѕ',
	'DZcy' => 'Џ',
	'dzcy' => 'џ',
	'GJcy' => 'Ѓ',
	'gjcy' => 'ѓ',
	'Iukcy' => 'І',
	'iukcy' => 'і',
	'Jsercy' => 'Ј',
	'jsercy' => 'ј',
	'Jukcy' => 'Є',
	'jukcy' => 'є',
	'KJcy' => 'Ќ',
	'kjcy' => 'ќ',
	'LJcy' => 'Љ',
	'ljcy' => 'љ',
	'NJcy' => 'Њ',
	'njcy' => 'њ',
	'TSHcy' => 'Ћ',
	'tshcy' => 'ћ',
	'Ubrcy' => 'Ў',
	'ubrcy' => 'ў',
	'YIcy' => 'Ї',
	'yicy' => 'ї',
	'acute' => '´',
	'breve' => '˘',
	'caron' => 'ˇ',
	'cedil' => '¸',
	'circ' => 'ˆ',
	'dblac' => '˝',
	'die' => '¨',
	'dot' => '˙',
	'grave' => '`',
	'macr' => '¯',
	'ogon' => '˛',
	'ring' => '˚',
	'tilde' => '˜',
	'uml' => '¨',
	'Aacute' => 'Á',
	'aacute' => 'á',
	'Acirc' => 'Â',
	'acirc' => 'â',
	'AElig' => 'Æ',
	'aelig' => 'æ',
	'Agrave' => 'À',
	'agrave' => 'à',
	'Aring' => 'Å',
	'aring' => 'å',
	'Atilde' => 'Ã',
	'atilde' => 'ã',
	'Auml' => 'Ä',
	'auml' => 'ä',
	'Ccedil' => 'Ç',
	'ccedil' => 'ç',
	'Eacute' => 'É',
	'eacute' => 'é',
	'Ecirc' => 'Ê',
	'ecirc' => 'ê',
	'Egrave' => 'È',
	'egrave' => 'è',
	'ETH' => 'Ð',
	'eth' => 'ð',
	'Euml' => 'Ë',
	'euml' => 'ë',
	'Iacute' => 'Í',
	'iacute' => 'í',
	'Icirc' => 'Î',
	'icirc' => 'î',
	'Igrave' => 'Ì',
	'igrave' => 'ì',
	'Iuml' => 'Ï',
	'iuml' => 'ï',
	'Ntilde' => 'Ñ',
	'ntilde' => 'ñ',
	'Oacute' => 'Ó',
	'oacute' => 'ó',
	'Ocirc' => 'Ô',
	'ocirc' => 'ô',
	'Ograve' => 'Ò',
	'ograve' => 'ò',
	'Oslash' => 'Ø',
	'oslash' => 'ø',
	'Otilde' => 'Õ',
	'otilde' => 'õ',
	'Ouml' => 'Ö',
	'ouml' => 'ö',
	'szlig' => 'ß',
	'THORN' => 'Þ',
	'thorn' => 'þ',
	'Uacute' => 'Ú',
	'uacute' => 'ú',
	'Ucirc' => 'Û',
	'ucirc' => 'û',
	'Ugrave' => 'Ù',
	'ugrave' => 'ù',
	'Uuml' => 'Ü',
	'uuml' => 'ü',
	'Yacute' => 'Ý',
	'yacute' => 'ý',
	'yuml' => 'ÿ',
	'Abreve' => 'Ă',
	'abreve' => 'ă',
	'Amacr' => 'Ā',
	'amacr' => 'ā',
	'Aogon' => 'Ą',
	'aogon' => 'ą',
	'Cacute' => 'Ć',
	'cacute' => 'ć',
	'Ccaron' => 'Č',
	'ccaron' => 'č',
	'Ccirc' => 'Ĉ',
	'ccirc' => 'ĉ',
	'Cdot' => 'Ċ',
	'cdot' => 'ċ',
	'Dcaron' => 'Ď',
	'dcaron' => 'ď',
	'Dstrok' => 'Đ',
	'dstrok' => 'đ',
	'Ecaron' => 'Ě',
	'ecaron' => 'ě',
	'Edot' => 'Ė',
	'edot' => 'ė',
	'Emacr' => 'Ē',
	'emacr' => 'ē',
	'ENG' => 'Ŋ',
	'eng' => 'ŋ',
	'Eogon' => 'Ę',
	'eogon' => 'ę',
	'gacute' => 'ǵ',
	'Gbreve' => 'Ğ',
	'gbreve' => 'ğ',
	'Gcedil' => 'Ģ',
	'Gcirc' => 'Ĝ',
	'gcirc' => 'ĝ',
	'Gdot' => 'Ġ',
	'gdot' => 'ġ',
	'Hcirc' => 'Ĥ',
	'hcirc' => 'ĥ',
	'Hstrok' => 'Ħ',
	'hstrok' => 'ħ',
	'Idot' => 'İ',
	'IJlig' => 'IJ',
	'ijlig' => 'ij',
	'Imacr' => 'Ī',
	'imacr' => 'ī',
	'inodot' => 'ı',
	'Iogon' => 'Į',
	'iogon' => 'į',
	'Itilde' => 'Ĩ',
	'itilde' => 'ĩ',
	'Jcirc' => 'Ĵ',
	'jcirc' => 'ĵ',
	'Kcedil' => 'Ķ',
	'kcedil' => 'ķ',
	'kgreen' => 'ĸ',
	'Lacute' => 'Ĺ',
	'lacute' => 'ĺ',
	'Lcaron' => 'Ľ',
	'lcaron' => 'ľ',
	'Lcedil' => 'Ļ',
	'lcedil' => 'ļ',
	'Lmidot' => 'Ŀ',
	'lmidot' => 'ŀ',
	'Lstrok' => 'Ł',
	'lstrok' => 'ł',
	'Nacute' => 'Ń',
	'nacute' => 'ń',
	'napos' => 'ʼn',
	'Ncaron' => 'Ň',
	'ncaron' => 'ň',
	'Ncedil' => 'Ņ',
	'ncedil' => 'ņ',
	'Odblac' => 'Ő',
	'odblac' => 'ő',
	'OElig' => 'Œ',
	'oelig' => 'œ',
	'Omacr' => 'Ō',
	'omacr' => 'ō',
	'Racute' => 'Ŕ',
	'racute' => 'ŕ',
	'Rcaron' => 'Ř',
	'rcaron' => 'ř',
	'Rcedil' => 'Ŗ',
	'rcedil' => 'ŗ',
	'Sacute' => 'Ś',
	'sacute' => 'ś',
	'Scaron' => 'Š',
	'scaron' => 'š',
	'Scedil' => 'Ş',
	'scedil' => 'ş',
	'Scirc' => 'Ŝ',
	'scirc' => 'ŝ',
	'Tcaron' => 'Ť',
	'tcaron' => 'ť',
	'Tcedil' => 'Ţ',
	'tcedil' => 'ţ',
	'Tstrok' => 'Ŧ',
	'tstrok' => 'ŧ',
	'Ubreve' => 'Ŭ',
	'ubreve' => 'ŭ',
	'Udblac' => 'Ű',
	'udblac' => 'ű',
	'Umacr' => 'Ū',
	'umacr' => 'ū',
	'Uogon' => 'Ų',
	'uogon' => 'ų',
	'Uring' => 'Ů',
	'uring' => 'ů',
	'Utilde' => 'Ũ',
	'utilde' => 'ũ',
	'Wcirc' => 'Ŵ',
	'wcirc' => 'ŵ',
	'Ycirc' => 'Ŷ',
	'ycirc' => 'ŷ',
	'Yuml' => 'Ÿ',
	'Zacute' => 'Ź',
	'zacute' => 'ź',
	'Zcaron' => 'Ž',
	'zcaron' => 'ž',
	'Zdot' => 'Ż',
	'zdot' => 'ż',
	'apos' => ''',
	'ast' => '*',
	'brvbar' => '¦',
	'bsol' => '\',
	'cent' => '¢',
	'colon' => ':',
	'comma' => ',',
	'commat' => '@',
	'copy' => '©',
	'curren' => '¤',
	'darr' => '↓',
	'deg' => '°',
	'divide' => '÷',
	'dollar' => '$',
	'equals' => '=',
	'excl' => '!',
	'frac12' => '½',
	'frac14' => '¼',
	'frac18' => '⅛',
	'frac34' => '¾',
	'frac38' => '⅜',
	'frac58' => '⅝',
	'frac78' => '⅞',
	'gt' => '>',
	'half' => '½',
	'horbar' => '―',
	'hyphen' => '‐',
	'iexcl' => '¡',
	'iquest' => '¿',
	'laquo' => '«',
	'larr' => '←',
	'lcub' => '{',
	'ldquo' => '“',
	'lowbar' => '_',
	'lpar' => '(',
	'lsqb' => '[',
	'lsquo' => '‘',
	'micro' => 'µ',
	'middot' => '·',
	'nbsp' => ' ',
	'not' => '¬',
	'num' => '#',
	'ohm' => 'Ω',
	'ordf' => 'ª',
	'ordm' => 'º',
	'para' => '¶',
	'percnt' => '%',
	'period' => '.',
	'plus' => '+',
	'plusmn' => '±',
	'pound' => '£',
	'quest' => '?',
	'quot' => '"',
	'raquo' => '»',
	'rarr' => '→',
	'rcub' => '}',
	'rdquo' => '”',
	'reg' => '®',
	'rpar' => ')',
	'rsqb' => ']',
	'rsquo' => '’',
	'sect' => '§',
	'semi' => '&#x0003B;',
	'shy' => '­',
	'sol' => '/',
	'sung' => '♪',
	'sup1' => '¹',
	'sup2' => '²',
	'sup3' => '³',
	'times' => '×',
	'trade' => '™',
	'uarr' => '↑',
	'verbar' => '|',
	'yen' => '¥',
	'blank' => '␣',
	'blk12' => '▒',
	'blk14' => '░',
	'blk34' => '▓',
	'block' => '█',
	'bull' => '•',
	'caret' => '⁁',
	'check' => '✓',
	'cir' => '○',
	'clubs' => '♣',
	'copysr' => '℗',
	'cross' => '✗',
	'Dagger' => '‡',
	'dagger' => '†',
	'dash' => '‐',
	'diams' => '♦',
	'dlcrop' => '⌍',
	'drcrop' => '⌌',
	'dtri' => '▿',
	'dtrif' => '▾',
	'emsp' => ' ',
	'emsp13' => ' ',
	'emsp14' => ' ',
	'ensp' => ' ',
	'female' => '♀',
	'ffilig' => 'ffi',
	'fflig' => 'ff',
	'ffllig' => 'ffl',
	'filig' => 'fi',
	'flat' => '♭',
	'fllig' => 'fl',
	'frac13' => '⅓',
	'frac15' => '⅕',
	'frac16' => '⅙',
	'frac23' => '⅔',
	'frac25' => '⅖',
	'frac35' => '⅗',
	'frac45' => '⅘',
	'frac56' => '⅚',
	'hairsp' => ' ',
	'hearts' => '♥',
	'hellip' => '…',
	'hybull' => '⁃',
	'incare' => '℅',
	'ldquor' => '„',
	'lhblk' => '▄',
	'loz' => '◊',
	'lozf' => '⧫',
	'lsquor' => '‚',
	'ltri' => '◃',
	'ltrif' => '◂',
	'male' => '♂',
	'malt' => '✠',
	'marker' => '▮',
	'mdash' => '—',
	'mldr' => '…',
	'natur' => '♮',
	'ndash' => '–',
	'nldr' => '‥',
	'numsp' => ' ',
	'phone' => '☎',
	'puncsp' => ' ',
	'rdquor' => '”',
	'rect' => '▭',
	'rsquor' => '’',
	'rtri' => '▹',
	'rtrif' => '▸',
	'rx' => '℞',
	'sext' => '✶',
	'sharp' => '♯',
	'spades' => '♠',
	'squ' => '□',
	'squf' => '▪',
	'star' => '☆',
	'starf' => '★',
	'target' => '⌖',
	'telrec' => '⌕',
	'thinsp' => ' ',
	'uhblk' => '▀',
	'ulcrop' => '⌏',
	'urcrop' => '⌎',
	'utri' => '▵',
	'utrif' => '▴',
	'vellip' => '⋮',
	'af' => '⁡',
	'aopf' => '𝕒',
	'asympeq' => '≍',
	'bopf' => '𝕓',
	'copf' => '𝕔',
	'Cross' => '⨯',
	'DD' => 'ⅅ',
	'dd' => 'ⅆ',
	'dopf' => '𝕕',
	'DownArrowBar' => '⤓',
	'DownBreve' => '̑',
	'DownLeftRightVector' => '⥐',
	'DownLeftTeeVector' => '⥞',
	'DownLeftVectorBar' => '⥖',
	'DownRightTeeVector' => '⥟',
	'DownRightVectorBar' => '⥗',
	'ee' => 'ⅇ',
	'EmptySmallSquare' => '◻',
	'EmptyVerySmallSquare' => '▫',
	'eopf' => '𝕖',
	'Equal' => '⩵',
	'FilledSmallSquare' => '◼',
	'FilledVerySmallSquare' => '▪',
	'fopf' => '𝕗',
	'gopf' => '𝕘',
	'GreaterGreater' => '⪢',
	'Hat' => '^',
	'hopf' => '𝕙',
	'HorizontalLine' => '─',
	'ic' => '⁣',
	'ii' => 'ⅈ',
	'iopf' => '𝕚',
	'it' => '⁢',
	'jopf' => '𝕛',
	'kopf' => '𝕜',
	'larrb' => '⇤',
	'LeftDownTeeVector' => '⥡',
	'LeftDownVectorBar' => '⥙',
	'LeftRightVector' => '⥎',
	'LeftTeeVector' => '⥚',
	'LeftTriangleBar' => '⧏',
	'LeftUpDownVector' => '⥑',
	'LeftUpTeeVector' => '⥠',
	'LeftUpVectorBar' => '⥘',
	'LeftVectorBar' => '⥒',
	'LessLess' => '⪡',
	'lopf' => '𝕝',
	'mapstodown' => '↧',
	'mapstoleft' => '↤',
	'mapstoup' => '↥',
	'MediumSpace' => ' ',
	'mopf' => '𝕞',
	'nbump' => '≎̸',
	'nbumpe' => '≏̸',
	'nesim' => '≂̸',
	'NewLine' => '
',
	'NoBreak' => '⁠',
	'nopf' => '𝕟',
	'NotCupCap' => '≭',
	'NotHumpEqual' => '≏̸',
	'NotLeftTriangleBar' => '⧏̸',
	'NotNestedGreaterGreater' => '⪢̸',
	'NotNestedLessLess' => '⪡̸',
	'NotRightTriangleBar' => '⧐̸',
	'NotSquareSubset' => '⊏̸',
	'NotSquareSuperset' => '⊐̸',
	'NotSucceedsTilde' => '≿̸',
	'oopf' => '𝕠',
	'OverBar' => '¯',
	'OverBrace' => '︷',
	'OverBracket' => '⎴',
	'OverParenthesis' => '︵',
	'planckh' => 'ℎ',
	'popf' => '𝕡',
	'Product' => '∏',
	'qopf' => '𝕢',
	'rarrb' => '⇥',
	'RightDownTeeVector' => '⥝',
	'RightDownVectorBar' => '⥕',
	'RightTeeVector' => '⥛',
	'RightTriangleBar' => '⧐',
	'RightUpDownVector' => '⥏',
	'RightUpTeeVector' => '⥜',
	'RightUpVectorBar' => '⥔',
	'RightVectorBar' => '⥓',
	'ropf' => '𝕣',
	'RoundImplies' => '⥰',
	'RuleDelayed' => '⧴',
	'sopf' => '𝕤',
	'Tab' => '	',
	'ThickSpace' => '   ',
	'topf' => '𝕥',
	'UnderBar' => '̲',
	'UnderBrace' => '︸',
	'UnderBracket' => '⎵',
	'UnderParenthesis' => '︶',
	'uopf' => '𝕦',
	'UpArrowBar' => '⤒',
	'Upsilon' => 'Υ',
	'VerticalLine' => '|',
	'VerticalSeparator' => '❘',
	'vopf' => '𝕧',
	'wopf' => '𝕨',
	'xopf' => '𝕩',
	'yopf' => '𝕪',
	'ZeroWidthSpace' => '​',
	'zopf' => '𝕫',
	'angle' => '∠',
	'ApplyFunction' => '⁡',
	'approx' => '≈',
	'approxeq' => '≊',
	'Assign' => '≔',
	'backcong' => '≌',
	'backepsilon' => '϶',
	'backprime' => '‵',
	'backsim' => '∽',
	'backsimeq' => '⋍',
	'Backslash' => '∖',
	'barwedge' => '⌅',
	'Because' => '∵',
	'because' => '∵',
	'Bernoullis' => 'ℬ',
	'between' => '≬',
	'bigcap' => '⋂',
	'bigcirc' => '◯',
	'bigcup' => '⋃',
	'bigodot' => '⨀',
	'bigoplus' => '⨁',
	'bigotimes' => '⨂',
	'bigsqcup' => '⨆',
	'bigstar' => '★',
	'bigtriangledown' => '▽',
	'bigtriangleup' => '△',
	'biguplus' => '⨄',
	'bigvee' => '⋁',
	'bigwedge' => '⋀',
	'bkarow' => '⤍',
	'blacklozenge' => '⧫',
	'blacksquare' => '▪',
	'blacktriangle' => '▴',
	'blacktriangledown' => '▾',
	'blacktriangleleft' => '◂',
	'blacktriangleright' => '▸',
	'bot' => '⊥',
	'boxminus' => '⊟',
	'boxplus' => '⊞',
	'boxtimes' => '⊠',
	'Breve' => '˘',
	'bullet' => '•',
	'Bumpeq' => '≎',
	'bumpeq' => '≏',
	'CapitalDifferentialD' => 'ⅅ',
	'Cayleys' => 'ℭ',
	'Cedilla' => '¸',
	'CenterDot' => '·',
	'centerdot' => '·',
	'checkmark' => '✓',
	'circeq' => '≗',
	'circlearrowleft' => '↺',
	'circlearrowright' => '↻',
	'circledast' => '⊛',
	'circledcirc' => '⊚',
	'circleddash' => '⊝',
	'CircleDot' => '⊙',
	'circledR' => '®',
	'circledS' => 'Ⓢ',
	'CircleMinus' => '⊖',
	'CirclePlus' => '⊕',
	'CircleTimes' => '⊗',
	'ClockwiseContourIntegral' => '∲',
	'CloseCurlyDoubleQuote' => '”',
	'CloseCurlyQuote' => '’',
	'clubsuit' => '♣',
	'coloneq' => '≔',
	'complement' => '∁',
	'complexes' => 'ℂ',
	'Congruent' => '≡',
	'ContourIntegral' => '∮',
	'Coproduct' => '∐',
	'CounterClockwiseContourIntegral' => '∳',
	'CupCap' => '≍',
	'curlyeqprec' => '⋞',
	'curlyeqsucc' => '⋟',
	'curlyvee' => '⋎',
	'curlywedge' => '⋏',
	'curvearrowleft' => '↶',
	'curvearrowright' => '↷',
	'dbkarow' => '⤏',
	'ddagger' => '‡',
	'ddotseq' => '⩷',
	'Del' => '∇',
	'DiacriticalAcute' => '´',
	'DiacriticalDot' => '˙',
	'DiacriticalDoubleAcute' => '˝',
	'DiacriticalGrave' => '`',
	'DiacriticalTilde' => '˜',
	'Diamond' => '⋄',
	'diamond' => '⋄',
	'diamondsuit' => '♦',
	'DifferentialD' => 'ⅆ',
	'digamma' => 'ϝ',
	'div' => '÷',
	'divideontimes' => '⋇',
	'doteq' => '≐',
	'doteqdot' => '≑',
	'DotEqual' => '≐',
	'dotminus' => '∸',
	'dotplus' => '∔',
	'dotsquare' => '⊡',
	'doublebarwedge' => '⌆',
	'DoubleContourIntegral' => '∯',
	'DoubleDot' => '¨',
	'DoubleDownArrow' => '⇓',
	'DoubleLeftArrow' => '⇐',
	'DoubleLeftRightArrow' => '⇔',
	'DoubleLeftTee' => '⫤',
	'DoubleLongLeftArrow' => '⟸',
	'DoubleLongLeftRightArrow' => '⟺',
	'DoubleLongRightArrow' => '⟹',
	'DoubleRightArrow' => '⇒',
	'DoubleRightTee' => '⊨',
	'DoubleUpArrow' => '⇑',
	'DoubleUpDownArrow' => '⇕',
	'DoubleVerticalBar' => '∥',
	'DownArrow' => '↓',
	'Downarrow' => '⇓',
	'downarrow' => '↓',
	'DownArrowUpArrow' => '⇵',
	'downdownarrows' => '⇊',
	'downharpoonleft' => '⇃',
	'downharpoonright' => '⇂',
	'DownLeftVector' => '↽',
	'DownRightVector' => '⇁',
	'DownTee' => '⊤',
	'DownTeeArrow' => '↧',
	'drbkarow' => '⤐',
	'Element' => '∈',
	'emptyset' => '∅',
	'eqcirc' => '≖',
	'eqcolon' => '≕',
	'eqsim' => '≂',
	'eqslantgtr' => '⪖',
	'eqslantless' => '⪕',
	'EqualTilde' => '≂',
	'Equilibrium' => '⇌',
	'Exists' => '∃',
	'expectation' => 'ℰ',
	'ExponentialE' => 'ⅇ',
	'exponentiale' => 'ⅇ',
	'fallingdotseq' => '≒',
	'ForAll' => '∀',
	'Fouriertrf' => 'ℱ',
	'geq' => '≥',
	'geqq' => '≧',
	'geqslant' => '⩾',
	'gg' => '≫',
	'ggg' => '⋙',
	'gnapprox' => '⪊',
	'gneq' => '⪈',
	'gneqq' => '≩',
	'GreaterEqual' => '≥',
	'GreaterEqualLess' => '⋛',
	'GreaterFullEqual' => '≧',
	'GreaterLess' => '≷',
	'GreaterSlantEqual' => '⩾',
	'GreaterTilde' => '≳',
	'gtrapprox' => '⪆',
	'gtrdot' => '⋗',
	'gtreqless' => '⋛',
	'gtreqqless' => '⪌',
	'gtrless' => '≷',
	'gtrsim' => '≳',
	'gvertneqq' => '≩︀',
	'Hacek' => 'ˇ',
	'hbar' => 'ℏ',
	'heartsuit' => '♥',
	'HilbertSpace' => 'ℋ',
	'hksearow' => '⤥',
	'hkswarow' => '⤦',
	'hookleftarrow' => '↩',
	'hookrightarrow' => '↪',
	'hslash' => 'ℏ',
	'HumpDownHump' => '≎',
	'HumpEqual' => '≏',
	'iiiint' => '⨌',
	'iiint' => '∭',
	'Im' => 'ℑ',
	'ImaginaryI' => 'ⅈ',
	'imagline' => 'ℐ',
	'imagpart' => 'ℑ',
	'Implies' => '⇒',
	'in' => '∈',
	'integers' => 'ℤ',
	'Integral' => '∫',
	'intercal' => '⊺',
	'Intersection' => '⋂',
	'intprod' => '⨼',
	'InvisibleComma' => '⁣',
	'InvisibleTimes' => '⁢',
	'langle' => '〈',
	'Laplacetrf' => 'ℒ',
	'lbrace' => '{',
	'lbrack' => '[',
	'LeftAngleBracket' => '〈',
	'LeftArrow' => '←',
	'Leftarrow' => '⇐',
	'leftarrow' => '←',
	'LeftArrowBar' => '⇤',
	'LeftArrowRightArrow' => '⇆',
	'leftarrowtail' => '↢',
	'LeftCeiling' => '⌈',
	'LeftDoubleBracket' => '〚',
	'LeftDownVector' => '⇃',
	'LeftFloor' => '⌊',
	'leftharpoondown' => '↽',
	'leftharpoonup' => '↼',
	'leftleftarrows' => '⇇',
	'LeftRightArrow' => '↔',
	'Leftrightarrow' => '⇔',
	'leftrightarrow' => '↔',
	'leftrightarrows' => '⇆',
	'leftrightharpoons' => '⇋',
	'leftrightsquigarrow' => '↭',
	'LeftTee' => '⊣',
	'LeftTeeArrow' => '↤',
	'leftthreetimes' => '⋋',
	'LeftTriangle' => '⊲',
	'LeftTriangleEqual' => '⊴',
	'LeftUpVector' => '↿',
	'LeftVector' => '↼',
	'leq' => '≤',
	'leqq' => '≦',
	'leqslant' => '⩽',
	'lessapprox' => '⪅',
	'lessdot' => '⋖',
	'lesseqgtr' => '⋚',
	'lesseqqgtr' => '⪋',
	'LessEqualGreater' => '⋚',
	'LessFullEqual' => '≦',
	'LessGreater' => '≶',
	'lessgtr' => '≶',
	'lesssim' => '≲',
	'LessSlantEqual' => '⩽',
	'LessTilde' => '≲',
	'll' => '≪',
	'llcorner' => '⌞',
	'Lleftarrow' => '⇚',
	'lmoustache' => '⎰',
	'lnapprox' => '⪉',
	'lneq' => '⪇',
	'lneqq' => '≨',
	'LongLeftArrow' => '⟵',
	'Longleftarrow' => '⟸',
	'longleftarrow' => '⟵',
	'LongLeftRightArrow' => '⟷',
	'Longleftrightarrow' => '⟺',
	'longleftrightarrow' => '⟷',
	'longmapsto' => '⟼',
	'LongRightArrow' => '⟶',
	'Longrightarrow' => '⟹',
	'longrightarrow' => '⟶',
	'looparrowleft' => '↫',
	'looparrowright' => '↬',
	'LowerLeftArrow' => '↙',
	'LowerRightArrow' => '↘',
	'lozenge' => '◊',
	'lrcorner' => '⌟',
	'Lsh' => '↰',
	'lvertneqq' => '≨︀',
	'maltese' => '✠',
	'mapsto' => '↦',
	'measuredangle' => '∡',
	'Mellintrf' => 'ℳ',
	'MinusPlus' => '∓',
	'mp' => '∓',
	'multimap' => '⊸',
	'napprox' => '≉',
	'natural' => '♮',
	'naturals' => 'ℕ',
	'nearrow' => '↗',
	'NegativeMediumSpace' => '​',
	'NegativeThickSpace' => '​',
	'NegativeThinSpace' => '​',
	'NegativeVeryThinSpace' => '​',
	'NestedGreaterGreater' => '≫',
	'NestedLessLess' => '≪',
	'nexists' => '∄',
	'ngeq' => '≱',
	'ngeqq' => '≧̸',
	'ngeqslant' => '⩾̸',
	'ngtr' => '≯',
	'nLeftarrow' => '⇍',
	'nleftarrow' => '↚',
	'nLeftrightarrow' => '⇎',
	'nleftrightarrow' => '↮',
	'nleq' => '≰',
	'nleqq' => '≦̸',
	'nleqslant' => '⩽̸',
	'nless' => '≮',
	'NonBreakingSpace' => ' ',
	'NotCongruent' => '≢',
	'NotDoubleVerticalBar' => '∦',
	'NotElement' => '∉',
	'NotEqual' => '≠',
	'NotEqualTilde' => '≂̸',
	'NotExists' => '∄',
	'NotGreater' => '≯',
	'NotGreaterEqual' => '≱',
	'NotGreaterFullEqual' => '≦̸',
	'NotGreaterGreater' => '≫̸',
	'NotGreaterLess' => '≹',
	'NotGreaterSlantEqual' => '⩾̸',
	'NotGreaterTilde' => '≵',
	'NotHumpDownHump' => '≎̸',
	'NotLeftTriangle' => '⋪',
	'NotLeftTriangleEqual' => '⋬',
	'NotLess' => '≮',
	'NotLessEqual' => '≰',
	'NotLessGreater' => '≸',
	'NotLessLess' => '≪̸',
	'NotLessSlantEqual' => '⩽̸',
	'NotLessTilde' => '≴',
	'NotPrecedes' => '⊀',
	'NotPrecedesEqual' => '⪯̸',
	'NotPrecedesSlantEqual' => '⋠',
	'NotReverseElement' => '∌',
	'NotRightTriangle' => '⋫',
	'NotRightTriangleEqual' => '⋭',
	'NotSquareSubsetEqual' => '⋢',
	'NotSquareSupersetEqual' => '⋣',
	'NotSubset' => '⊂⃒',
	'NotSubsetEqual' => '⊈',
	'NotSucceeds' => '⊁',
	'NotSucceedsEqual' => '⪰̸',
	'NotSucceedsSlantEqual' => '⋡',
	'NotSuperset' => '⊃⃒',
	'NotSupersetEqual' => '⊉',
	'NotTilde' => '≁',
	'NotTildeEqual' => '≄',
	'NotTildeFullEqual' => '≇',
	'NotTildeTilde' => '≉',
	'NotVerticalBar' => '∤',
	'nparallel' => '∦',
	'nprec' => '⊀',
	'npreceq' => '⪯̸',
	'nRightarrow' => '⇏',
	'nrightarrow' => '↛',
	'nshortmid' => '∤',
	'nshortparallel' => '∦',
	'nsimeq' => '≄',
	'nsubset' => '⊂⃒',
	'nsubseteq' => '⊈',
	'nsubseteqq' => '⫅̸',
	'nsucc' => '⊁',
	'nsucceq' => '⪰̸',
	'nsupset' => '⊃⃒',
	'nsupseteq' => '⊉',
	'nsupseteqq' => '⫆̸',
	'ntriangleleft' => '⋪',
	'ntrianglelefteq' => '⋬',
	'ntriangleright' => '⋫',
	'ntrianglerighteq' => '⋭',
	'nwarrow' => '↖',
	'oint' => '∮',
	'OpenCurlyDoubleQuote' => '“',
	'OpenCurlyQuote' => '‘',
	'orderof' => 'ℴ',
	'parallel' => '∥',
	'PartialD' => '∂',
	'pitchfork' => '⋔',
	'PlusMinus' => '±',
	'pm' => '±',
	'Poincareplane' => 'ℌ',
	'prec' => '≺',
	'precapprox' => '⪷',
	'preccurlyeq' => '≼',
	'Precedes' => '≺',
	'PrecedesEqual' => '⪯',
	'PrecedesSlantEqual' => '≼',
	'PrecedesTilde' => '≾',
	'preceq' => '⪯',
	'precnapprox' => '⪹',
	'precneqq' => '⪵',
	'precnsim' => '⋨',
	'precsim' => '≾',
	'primes' => 'ℙ',
	'Proportion' => '∷',
	'Proportional' => '∝',
	'propto' => '∝',
	'quaternions' => 'ℍ',
	'questeq' => '≟',
	'rangle' => '〉',
	'rationals' => 'ℚ',
	'rbrace' => '}',
	'rbrack' => ']',
	'Re' => 'ℜ',
	'realine' => 'ℛ',
	'realpart' => 'ℜ',
	'reals' => 'ℝ',
	'ReverseElement' => '∋',
	'ReverseEquilibrium' => '⇋',
	'ReverseUpEquilibrium' => '⥯',
	'RightAngleBracket' => '〉',
	'RightArrow' => '→',
	'Rightarrow' => '⇒',
	'rightarrow' => '→',
	'RightArrowBar' => '⇥',
	'RightArrowLeftArrow' => '⇄',
	'rightarrowtail' => '↣',
	'RightCeiling' => '⌉',
	'RightDoubleBracket' => '〛',
	'RightDownVector' => '⇂',
	'RightFloor' => '⌋',
	'rightharpoondown' => '⇁',
	'rightharpoonup' => '⇀',
	'rightleftarrows' => '⇄',
	'rightleftharpoons' => '⇌',
	'rightrightarrows' => '⇉',
	'rightsquigarrow' => '↝',
	'RightTee' => '⊢',
	'RightTeeArrow' => '↦',
	'rightthreetimes' => '⋌',
	'RightTriangle' => '⊳',
	'RightTriangleEqual' => '⊵',
	'RightUpVector' => '↾',
	'RightVector' => '⇀',
	'risingdotseq' => '≓',
	'rmoustache' => '⎱',
	'Rrightarrow' => '⇛',
	'Rsh' => '↱',
	'searrow' => '↘',
	'setminus' => '∖',
	'ShortDownArrow' => '↓',
	'ShortLeftArrow' => '←',
	'shortmid' => '∣',
	'shortparallel' => '∥',
	'ShortRightArrow' => '→',
	'ShortUpArrow' => '↑',
	'simeq' => '≃',
	'SmallCircle' => '∘',
	'smallsetminus' => '∖',
	'spadesuit' => '♠',
	'Sqrt' => '√',
	'sqsubset' => '⊏',
	'sqsubseteq' => '⊑',
	'sqsupset' => '⊐',
	'sqsupseteq' => '⊒',
	'Square' => '□',
	'SquareIntersection' => '⊓',
	'SquareSubset' => '⊏',
	'SquareSubsetEqual' => '⊑',
	'SquareSuperset' => '⊐',
	'SquareSupersetEqual' => '⊒',
	'SquareUnion' => '⊔',
	'Star' => '⋆',
	'straightepsilon' => 'ϵ',
	'straightphi' => 'ϕ',
	'Subset' => '⋐',
	'subset' => '⊂',
	'subseteq' => '⊆',
	'subseteqq' => '⫅',
	'SubsetEqual' => '⊆',
	'subsetneq' => '⊊',
	'subsetneqq' => '⫋',
	'succ' => '≻',
	'succapprox' => '⪸',
	'succcurlyeq' => '≽',
	'Succeeds' => '≻',
	'SucceedsEqual' => '⪰',
	'SucceedsSlantEqual' => '≽',
	'SucceedsTilde' => '≿',
	'succeq' => '⪰',
	'succnapprox' => '⪺',
	'succneqq' => '⪶',
	'succnsim' => '⋩',
	'succsim' => '≿',
	'SuchThat' => '∋',
	'Sum' => '∑',
	'Superset' => '⊃',
	'SupersetEqual' => '⊇',
	'Supset' => '⋑',
	'supset' => '⊃',
	'supseteq' => '⊇',
	'supseteqq' => '⫆',
	'supsetneq' => '⊋',
	'supsetneqq' => '⫌',
	'swarrow' => '↙',
	'Therefore' => '∴',
	'therefore' => '∴',
	'thickapprox' => '≈',
	'thicksim' => '∼',
	'ThinSpace' => ' ',
	'Tilde' => '∼',
	'TildeEqual' => '≃',
	'TildeFullEqual' => '≅',
	'TildeTilde' => '≈',
	'toea' => '⤨',
	'tosa' => '⤩',
	'triangle' => '▵',
	'triangledown' => '▿',
	'triangleleft' => '◃',
	'trianglelefteq' => '⊴',
	'triangleq' => '≜',
	'triangleright' => '▹',
	'trianglerighteq' => '⊵',
	'TripleDot' => '⃛',
	'twoheadleftarrow' => '↞',
	'twoheadrightarrow' => '↠',
	'ulcorner' => '⌜',
	'Union' => '⋃',
	'UnionPlus' => '⊎',
	'UpArrow' => '↑',
	'Uparrow' => '⇑',
	'uparrow' => '↑',
	'UpArrowDownArrow' => '⇅',
	'UpDownArrow' => '↕',
	'Updownarrow' => '⇕',
	'updownarrow' => '↕',
	'UpEquilibrium' => '⥮',
	'upharpoonleft' => '↿',
	'upharpoonright' => '↾',
	'UpperLeftArrow' => '↖',
	'UpperRightArrow' => '↗',
	'upsilon' => 'υ',
	'UpTee' => '⊥',
	'UpTeeArrow' => '↥',
	'upuparrows' => '⇈',
	'urcorner' => '⌝',
	'varepsilon' => 'ε',
	'varkappa' => 'ϰ',
	'varnothing' => '∅',
	'varphi' => 'φ',
	'varpi' => 'ϖ',
	'varpropto' => '∝',
	'varrho' => 'ϱ',
	'varsigma' => 'ς',
	'varsubsetneq' => '⊊︀',
	'varsubsetneqq' => '⫋︀',
	'varsupsetneq' => '⊋︀',
	'varsupsetneqq' => '⫌︀',
	'vartheta' => 'ϑ',
	'vartriangleleft' => '⊲',
	'vartriangleright' => '⊳',
	'Vee' => '⋁',
	'vee' => '∨',
	'Vert' => '‖',
	'vert' => '|',
	'VerticalBar' => '∣',
	'VerticalTilde' => '≀',
	'VeryThinSpace' => ' ',
	'Wedge' => '⋀',
	'wedge' => '∧',
	'wp' => '℘',
	'wr' => '≀',
	'zeetrf' => 'ℨ'
  }
#:startdoc:

# Converts XHTML+MathML named entities in string to Numeric Character References
#
#  :call-seq:
#     string.to_ncr  -> string
#
    def to_ncr
       self.gsub(/&([a-zA-Z0-9]+);/) {|m| $1.convert_to_ncr}
    end

# Converts XHTML+MathML named entities in string to Numeric Character References
#
#  :call-seq:
#     string.to_ncr!  -> str or nil
#
# Substitution is done in-place.
#
    def to_ncr!
       self.gsub!(/&([a-zA-Z0-9]+);/) {|m| $1.convert_to_ncr}
    end

# Converts XHTML+MathML named entities in string to UTF-8
#
#  :call-seq:
#     string.to_utf8  -> string
#
#--
    def to_utf8
      self.gsub(/&([a-zA-Z0-9]+);/) {|m| $1.convert_to_utf8}
      
      # You might think this is faster, but it isn't
      # pieces = self.split(/&([a-zA-Z0-9]+);/)
      # 1.step(pieces.length-1, 2) {|i| pieces[i].convert_to_utf8}
      # pieces.join
    end
    
#++
# Converts XHTML+MathML named entities in string to UTF-8
#
#  :call-seq:
#     string.to_ncr!  -> str or nil
#
# Substitution is done in-place.
#
    def to_utf8!
       self.gsub!(/&([a-zA-Z0-9]+);/) {|m| $1.convert_to_utf8}
    end

#:stopdoc:

    def escapeHTML
            self.gsub( /&/, "&" ).
             gsub( /</, "&lt;" ).
             gsub( />/, "&gt;" ).
             gsub(/'/, "&#39;" ).
             gsub(/"/, "&quot;" )
    end
    
    def unescapeHTML
    self.gsub(/&(.*?);/) do
      match = $1.dup
      case match
      when /\Aamp\z/ni           then '&'
      when /\Agt\z/ni            then '>'
      when /\Alt\z/ni            then '<'
      when /\Aquot\z/ni            then '"'
      when /\Aapos\z/ni            then "'"
      when /\A#0*(\d+)\z/n       then
        if Integer($1) < 256
          Integer($1).chr
        else
          if Integer($1) < 1114111
            [Integer($1)].pack("U")
          else
            "&##{$1};"
          end
        end
      when /\A#x([0-9a-f]+)\z/ni then
        if $1.hex < 256
          $1.hex.chr
        else
          if $1.hex < 1114111
            [$1.hex].pack("U")
          else
            "&#x#{$1};"
          end
        end
      else
        "&#{match};"
      end
    end
  end

  protected

    def convert_to_ncr #:nodoc:
      if self =~ /^(lt|gt|amp|quot|apos)$/
        self.replace "&" + self + ";"
      elsif MATHML_ENTITIES.has_key?(self)
        self.replace MATHML_ENTITIES[self]
      else
        self.replace "&amp;" + self + ";"
      end
    end

    def convert_to_utf8 #:nodoc:
      if self =~ /^(lt|gt|amp|quot|apos)$/
        self.replace "&" + self + ";"
      elsif MATHML_ENTITIES.has_key?(self)         
        self.replace MATHML_ENTITIES[self].split(';').collect {|s| s.gsub(/^&#x([A-F0-9]+)$/, '\1').hex }.pack('U*')
      else
        self.replace "&amp;" + self + ";"
      end
    end


end