command! Entities call Entities()<CR>
function! Entities()
  silent s/Á/\&Aacute;/e
  silent s/á/\&aacute;/e
  silent s/Â/\&Acirc;/e
  silent s/â/\&acirc;/e
  silent s/´/\&acute;/e
  silent s/Æ/\&AElig;/e
  silent s/æ/\&aelig;/e
  silent s/À/\&Agrave;/e
  silent s/à/\&agrave;/e
  silent s/ℵ/\&alefsym;/e
  silent s/Α/\&Alpha;/e
  silent s/α/\&alpha;/e
  silent s/∧/\&and;/e
  silent s/∠/\&ang;/e
  "silent s/'/\&apos;/e
  silent s/Å/\&Aring;/e
  silent s/å/\&aring;/e
  silent s/≈/\&asymp;/e
  silent s/Ã/\&Atilde;/e
  silent s/ã/\&atilde;/e
  silent s/Ä/\&Auml;/e
  silent s/ä/\&auml;/e
  silent s/„/\&bdquo;/e
  silent s/Β/\&Beta;/e
  silent s/β/\&beta;/e
  silent s/¦/\&brvbar;/e
  silent s/•/\&bull;/e
  silent s/∩/\&cap;/e
  silent s/Ç/\&Ccedil;/e
  silent s/ç/\&ccedil;/e
  silent s/¸/\&cedil;/e
  silent s/¢/\&cent;/e
  silent s/Χ/\&Chi;/e
  silent s/χ/\&chi;/e
  silent s/ˆ/\&circ;/e
  silent s/♣/\&clubs;/e
  silent s/≅/\&cong;/e
  silent s/©/\&copy;/e
  silent s/↵/\&crarr;/e
  silent s/∪/\&cup;/e
  silent s/¤/\&curren;/e
  silent s/†/\&dagger;/e
  silent s/‡/\&Dagger;/e
  silent s/↓/\&darr;/e
  silent s/⇓/\&dArr;/e
  silent s/°/\&deg;/e
  silent s/Δ/\&Delta;/e
  silent s/δ/\&delta;/e
  silent s/♦/\&diams;/e
  silent s/÷/\&divide;/e
  silent s/É/\&Eacute;/e
  silent s/é/\&eacute;/e
  silent s/Ê/\&Ecirc;/e
  silent s/ê/\&ecirc;/e
  silent s/È/\&Egrave;/e
  silent s/è/\&egrave;/e
  silent s/∅/\&empty;/e
  silent s/Ε/\&Epsilon;/e
  silent s/ε/\&epsilon;/e
  silent s/≡/\&equiv;/e
  silent s/Η/\&Eta;/e
  silent s/η/\&eta;/e
  silent s/Ð/\&ETH;/e
  silent s/ð/\&eth;/e
  silent s/Ë/\&Euml;/e
  silent s/ë/\&euml;/e
  silent s/€/\&euro;/e
  silent s/∃/\&exist;/e
  silent s/ƒ/\&fnof;/e
  silent s/∀/\&forall;/e
  silent s/½/\&frac12;/e
  silent s/¼/\&frac14;/e
  silent s/¾/\&frac34;/e
  silent s/Γ/\&Gamma;/e
  silent s/γ/\&gamma;/e
  silent s/≥/\&ge;/e
  silent s/↔/\&harr;/e
  silent s/⇔/\&hArr;/e
  silent s/♥/\&hearts;/e
  silent s/…/\&hellip;/e
  silent s/Í/\&Iacute;/e
  silent s/í/\&iacute;/e
  silent s/Î/\&Icirc;/e
  silent s/î/\&icirc;/e
  silent s/¡/\&iexcl;/e
  silent s/Ì/\&Igrave;/e
  silent s/ì/\&igrave;/e
  silent s/ℑ/\&image;/e
  silent s/∞/\&infin;/e
  silent s/∫/\&int;/e
  silent s/Ι/\&Iota;/e
  silent s/ι/\&iota;/e
  silent s/¿/\&iquest;/e
  silent s/∈/\&isin;/e
  silent s/Ï/\&Iuml;/e
  silent s/ï/\&iuml;/e
  silent s/Κ/\&Kappa;/e
  silent s/κ/\&kappa;/e
  silent s/Λ/\&Lambda;/e
  silent s/λ/\&lambda;/e
  silent s/«/\&laquo;/e
  silent s/←/\&larr;/e
  silent s/⇐/\&lArr;/e
  silent s/⌈/\&lceil;/e
  silent s/“/\&ldquo;/e
  silent s/≤/\&le;/e
  silent s/⌊/\&lfloor;/e
  silent s/∗/\&lowast;/e
  silent s/◊/\&loz;/e
  silent s/‹/\&lsaquo;/e
  silent s/‘/\&lsquo;/e
  silent s/¯/\&macr;/e
  silent s/—/\&mdash;/e
  silent s/µ/\&micro;/e
  silent s/·/\&middot;/e
  silent s/−/\&minus;/e
  silent s/Μ/\&Mu;/e
  silent s/μ/\&mu;/e
  silent s/∇/\&nabla;/e
  silent s/–/\&ndash;/e
  silent s/≠/\&ne;/e
  silent s/∋/\&ni;/e
  silent s/¬/\&not;/e
  silent s/∉/\&notin;/e
  silent s/⊄/\&nsub;/e
  silent s/Ñ/\&Ntilde;/e
  silent s/ñ/\&ntilde;/e
  silent s/Ν/\&Nu;/e
  silent s/ν/\&nu;/e
  silent s/Ó/\&Oacute;/e
  silent s/ó/\&oacute;/e
  silent s/Ô/\&Ocirc;/e
  silent s/ô/\&ocirc;/e
  silent s/Œ/\&OElig;/e
  silent s/œ/\&oelig;/e
  silent s/Ò/\&Ograve;/e
  silent s/ò/\&ograve;/e
  silent s/‾/\&oline;/e
  silent s/Ω/\&Omega;/e
  silent s/ω/\&omega;/e
  silent s/Ο/\&Omicron;/e
  silent s/ο/\&omicron;/e
  silent s/⊕/\&oplus;/e
  silent s/∨/\&or;/e
  silent s/ª/\&ordf;/e
  silent s/º/\&ordm;/e
  silent s/Ø/\&Oslash;/e
  silent s/ø/\&oslash;/e
  silent s/Õ/\&Otilde;/e
  silent s/õ/\&otilde;/e
  silent s/⊗/\&otimes;/e
  silent s/Ö/\&Ouml;/e
  silent s/ö/\&ouml;/e
  silent s/¶/\&para;/e
  silent s/∂/\&part;/e
  silent s/‰/\&permil;/e
  silent s/⊥/\&perp;/e
  silent s/Φ/\&Phi;/e
  silent s/φ/\&phi;/e
  silent s/Π/\&Pi;/e
  silent s/π/\&pi;/e
  silent s/ϖ/\&piv;/e
  silent s/±/\&plusmn;/e
  silent s/£/\&pound;/e
  silent s/′/\&prime;/e
  silent s/″/\&Prime;/e
  silent s/∏/\&prod;/e
  silent s/∝/\&prop;/e
  silent s/Ψ/\&Psi;/e
  silent s/ψ/\&psi;/e
  "silent s/"/\&quot;/e
  silent s/√/\&radic;/e
  silent s/»/\&raquo;/e
  silent s/→/\&rarr;/e
  silent s/⇒/\&rArr;/e
  silent s/⌉/\&rceil;/e
  silent s/”/\&rdquo;/e
  silent s/ℜ/\&real;/e
  silent s/®/\&reg;/e
  silent s/⌋/\&rfloor;/e
  silent s/Ρ/\&Rho;/e
  silent s/ρ/\&rho;/e
  silent s/›/\&rsaquo;/e
  silent s/’/\&rsquo;/e
  silent s/‚/\&sbquo;/e
  silent s/Š/\&Scaron;/e
  silent s/š/\&scaron;/e
  silent s/⋅/\&sdot;/e
  silent s/§/\&sect;/e
  silent s/Σ/\&Sigma;/e
  silent s/σ/\&sigma;/e
  silent s/ς/\&sigmaf;/e
  silent s/∼/\&sim;/e
  silent s/♠/\&spades;/e
  silent s/⊂/\&sub;/e
  silent s/⊆/\&sube;/e
  silent s/∑/\&sum;/e
  silent s/⊃/\&sup;/e
  silent s/¹/\&sup1;/e
  silent s/²/\&sup2;/e
  silent s/³/\&sup3;/e
  silent s/⊇/\&supe;/e
  silent s/ß/\&szlig;/e
  silent s/Τ/\&Tau;/e
  silent s/τ/\&tau;/e
  silent s/∴/\&there4;/e
  silent s/Θ/\&Theta;/e
  silent s/θ/\&theta;/e
  silent s/ϑ/\&thetasym;/e
  silent s/Þ/\&THORN;/e
  silent s/þ/\&thorn;/e
  silent s/˜/\&tilde;/e
  silent s/×/\&times;/e
  silent s/™/\&trade;/e
  silent s/Ú/\&Uacute;/e
  silent s/ú/\&uacute;/e
  silent s/↑/\&uarr;/e
  silent s/⇑/\&uArr;/e
  silent s/Û/\&Ucirc;/e
  silent s/û/\&ucirc;/e
  silent s/Ù/\&Ugrave;/e
  silent s/ù/\&ugrave;/e
  silent s/¨/\&uml;/e
  silent s/ϒ/\&upsih;/e
  silent s/Υ/\&Upsilon;/e
  silent s/υ/\&upsilon;/e
  silent s/Ü/\&Uuml;/e
  silent s/ü/\&uuml;/e
  silent s/℘/\&weierp;/e
  silent s/Ξ/\&Xi;/e
  silent s/ξ/\&xi;/e
  silent s/Ý/\&Yacute;/e
  silent s/ý/\&yacute;/e
  silent s/¥/\&yen;/e
  silent s/ÿ/\&yuml;/e
  silent s/Ÿ/\&Yuml;/e
  silent s/Ζ/\&Zeta;/e
  silent s/ζ/\&zeta;/e
endfunction

command! ReverseEntities call ReverseEntities()<CR>
function! ReverseEntities()
  silent s/&Aacute;/Á/e
  silent s/&aacute;/á/e
  silent s/&Acirc;/Â/e
  silent s/&acirc;/â/e
  silent s/&acute;/´/e
  silent s/&AElig;/Æ/e
  silent s/&aelig;/æ/e
  silent s/&Agrave;/À/e
  silent s/&agrave;/à/e
  silent s/&alefsym;/ℵ/e
  silent s/&Alpha;/Α/e
  silent s/&alpha;/α/e
  silent s/&and;/∧/e
  silent s/&ang;/∠/e
  "silent s/&apos;/'/e
  silent s/&Aring;/Å/e
  silent s/&aring;/å/e
  silent s/&asymp;/≈/e
  silent s/&Atilde;/Ã/e
  silent s/&atilde;/ã/e
  silent s/&Auml;/Ä/e
  silent s/&auml;/ä/e
  silent s/&bdquo;/„/e
  silent s/&Beta;/Β/e
  silent s/&beta;/β/e
  silent s/&brvbar;/¦/e
  silent s/&bull;/•/e
  silent s/&cap;/∩/e
  silent s/&Ccedil;/Ç/e
  silent s/&ccedil;/ç/e
  silent s/&cedil;/¸/e
  silent s/&cent;/¢/e
  silent s/&Chi;/Χ/e
  silent s/&chi;/χ/e
  silent s/&circ;/ˆ/e
  silent s/&clubs;/♣/e
  silent s/&cong;/≅/e
  silent s/&copy;/©/e
  silent s/&crarr;/↵/e
  silent s/&cup;/∪/e
  silent s/&curren;/¤/e
  silent s/&dagger;/†/e
  silent s/&Dagger;/‡/e
  silent s/&darr;/↓/e
  silent s/&dArr;/⇓/e
  silent s/&deg;/°/e
  silent s/&Delta;/Δ/e
  silent s/&delta;/δ/e
  silent s/&diams;/♦/e
  silent s/&divide;/÷/e
  silent s/&Eacute;/É/e
  silent s/&eacute;/é/e
  silent s/&Ecirc;/Ê/e
  silent s/&ecirc;/ê/e
  silent s/&Egrave;/È/e
  silent s/&egrave;/è/e
  silent s/&empty;/∅/e
  silent s/&Epsilon;/Ε/e
  silent s/&epsilon;/ε/e
  silent s/&equiv;/≡/e
  silent s/&Eta;/Η/e
  silent s/&eta;/η/e
  silent s/&ETH;/Ð/e
  silent s/&eth;/ð/e
  silent s/&Euml;/Ë/e
  silent s/&euml;/ë/e
  silent s/&euro;/€/e
  silent s/&exist;/∃/e
  silent s/&fnof;/ƒ/e
  silent s/&forall;/∀/e
  silent s/&frac12;/½/e
  silent s/&frac14;/¼/e
  silent s/&frac34;/¾/e
  silent s/&Gamma;/Γ/e
  silent s/&gamma;/γ/e
  silent s/&ge;/≥/e
  silent s/&harr;/↔/e
  silent s/&hArr;/⇔/e
  silent s/&hearts;/♥/e
  silent s/&hellip;/…/e
  silent s/&Iacute;/Í/e
  silent s/&iacute;/í/e
  silent s/&Icirc;/Î/e
  silent s/&icirc;/î/e
  silent s/&iexcl;/¡/e
  silent s/&Igrave;/Ì/e
  silent s/&igrave;/ì/e
  silent s/&image;/ℑ/e
  silent s/&infin;/∞/e
  silent s/&int;/∫/e
  silent s/&Iota;/Ι/e
  silent s/&iota;/ι/e
  silent s/&iquest;/¿/e
  silent s/&isin;/∈/e
  silent s/&Iuml;/Ï/e
  silent s/&iuml;/ï/e
  silent s/&Kappa;/Κ/e
  silent s/&kappa;/κ/e
  silent s/&Lambda;/Λ/e
  silent s/&lambda;/λ/e
  silent s/&laquo;/«/e
  silent s/&larr;/←/e
  silent s/&lArr;/⇐/e
  silent s/&lceil;/⌈/e
  silent s/&ldquo;/“/e
  silent s/&le;/≤/e
  silent s/&lfloor;/⌊/e
  silent s/&lowast;/∗/e
  silent s/&loz;/◊/e
  silent s/&lsaquo;/‹/e
  silent s/&lsquo;/‘/e
  silent s/&macr;/¯/e
  silent s/&mdash;/—/e
  silent s/&micro;/µ/e
  silent s/&middot;/·/e
  silent s/&minus;/−/e
  silent s/&Mu;/Μ/e
  silent s/&mu;/μ/e
  silent s/&nabla;/∇/e
  silent s/&ndash;/–/e
  silent s/&ne;/≠/e
  silent s/&ni;/∋/e
  silent s/&not;/¬/e
  silent s/&notin;/∉/e
  silent s/&nsub;/⊄/e
  silent s/&Ntilde;/Ñ/e
  silent s/&ntilde;/ñ/e
  silent s/&Nu;/Ν/e
  silent s/&nu;/ν/e
  silent s/&Oacute;/Ó/e
  silent s/&oacute;/ó/e
  silent s/&Ocirc;/Ô/e
  silent s/&ocirc;/ô/e
  silent s/&OElig;/Œ/e
  silent s/&oelig;/œ/e
  silent s/&Ograve;/Ò/e
  silent s/&ograve;/ò/e
  silent s/&oline;/‾/e
  silent s/&Omega;/Ω/e
  silent s/&omega;/ω/e
  silent s/&Omicron;/Ο/e
  silent s/&omicron;/ο/e
  silent s/&oplus;/⊕/e
  silent s/&or;/∨/e
  silent s/&ordf;/ª/e
  silent s/&ordm;/º/e
  silent s/&Oslash;/Ø/e
  silent s/&oslash;/ø/e
  silent s/&Otilde;/Õ/e
  silent s/&otilde;/õ/e
  silent s/&otimes;/⊗/e
  silent s/&Ouml;/Ö/e
  silent s/&ouml;/ö/e
  silent s/&para;/¶/e
  silent s/&part;/∂/e
  silent s/&permil;/‰/e
  silent s/&perp;/⊥/e
  silent s/&Phi;/Φ/e
  silent s/&phi;/φ/e
  silent s/&Pi;/Π/e
  silent s/&pi;/π/e
  silent s/&piv;/ϖ/e
  silent s/&plusmn;/±/e
  silent s/&pound;/£/e
  silent s/&prime;/′/e
  silent s/&Prime;/″/e
  silent s/&prod;/∏/e
  silent s/&prop;/∝/e
  silent s/&Psi;/Ψ/e
  silent s/&psi;/ψ/e
  silent s/&quot;/"/e
  silent s/&radic;/√/e
  silent s/&raquo;/»/e
  silent s/&rarr;/→/e
  silent s/&rArr;/⇒/e
  silent s/&rceil;/⌉/e
  silent s/&rdquo;/”/e
  silent s/&real;/ℜ/e
  silent s/&reg;/®/e
  silent s/&rfloor;/⌋/e
  silent s/&Rho;/Ρ/e
  silent s/&rho;/ρ/e
  silent s/&rsaquo;/›/e
  silent s/&rsquo;/’/e
  silent s/&sbquo;/‚/e
  silent s/&Scaron;/Š/e
  silent s/&scaron;/š/e
  silent s/&sdot;/⋅/e
  silent s/&sect;/§/e
  silent s/&Sigma;/Σ/e
  silent s/&sigma;/σ/e
  silent s/&sigmaf;/ς/e
  silent s/&sim;/∼/e
  silent s/&spades;/♠/e
  silent s/&sub;/⊂/e
  silent s/&sube;/⊆/e
  silent s/&sum;/∑/e
  silent s/&sup;/⊃/e
  silent s/&sup1;/¹/e
  silent s/&sup2;/²/e
  silent s/&sup3;/³/e
  silent s/&supe;/⊇/e
  silent s/&szlig;/ß/e
  silent s/&Tau;/Τ/e
  silent s/&tau;/τ/e
  silent s/&there4;/∴/e
  silent s/&Theta;/Θ/e
  silent s/&theta;/θ/e
  silent s/&thetasym;/ϑ/e
  silent s/&THORN;/Þ/e
  silent s/&thorn;/þ/e
  silent s/&tilde;/˜/e
  silent s/&times;/×/e
  silent s/&trade;/™/e
  silent s/&Uacute;/Ú/e
  silent s/&uacute;/ú/e
  silent s/&uarr;/↑/e
  silent s/&uArr;/⇑/e
  silent s/&Ucirc;/Û/e
  silent s/&ucirc;/û/e
  silent s/&Ugrave;/Ù/e
  silent s/&ugrave;/ù/e
  silent s/&uml;/¨/e
  silent s/&upsih;/ϒ/e
  silent s/&Upsilon;/Υ/e
  silent s/&upsilon;/υ/e
  silent s/&Uuml;/Ü/e
  silent s/&uuml;/ü/e
  silent s/&weierp;/℘/e
  silent s/&Xi;/Ξ/e
  silent s/&xi;/ξ/e
  silent s/&Yacute;/Ý/e
  silent s/&yacute;/ý/e
  silent s/&yen;/¥/e
  silent s/&yuml;/ÿ/e
  silent s/&Yuml;/Ÿ/e
  silent s/&Zeta;/Ζ/e
  silent s/&zeta;/ζ/e
endfunction