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文字実体参照-Character Entity References

参照;5-3 Character ReferencesCharacter entity references in HTML 4

HTML4.01での文字実体参照は、W3CのSpecificationでは、Character entity references in HTML 4で扱われています。ここに少し手を加えて載録しておきますので、御利用下さい。

XHTML 1.1 における文字実体参照表もあります。何か変わってますかね?御利用ください。

1. Introduction to character entity references
2. Latin 系特殊文字
Character entity references for ISO 8859-1 characters
3. 数学記号、現代ギリシャ文字
Character entity references for symbols, mathematical symbols, and Greek letters
4. マークアップ記号と国際化文字
Character entity references for markup-significant and internationalization characters

1. 文字実体参照の概略

キーボードから直接入力できない文字を入力する為に、文字参照と言う仕組みがあります。文字参照の方法は、番号とキーワードの 2 種類が使えます。昔は番号文字参照(&#番号;)のみだったようですが、今はキーワードで参照(&キーワード;)できます。

÷を参照するのに、文字実体参照&divide;の方が、番号文字参照&#247;よりも覚えやすいのは明らかでしょう。

【例】

<!ENTITY sect CDATA" § " --section sign,U+00A7 ISOnum-->
<!ENTITY 文字実体参照名 データタイプ"表示例 " --コメント(補足的参考情報)-->

文字実体参照名に注目してください。

上の例では、§ を参照する為には、&sect;と書けば良い事が分かります。

因みに、ですが、このファイルでは、実際には文字実体参照ではなく、数字文字参照が使われています。


2. Latin系特殊文字

<!ENTITY  nbsp    CDATA "   " -- no-break space = non-breaking space,
                                  U+00A0 ISOnum -->
<!ENTITY  iexcl   CDATA " ¡ " -- inverted exclamation mark, U+00A1 ISOnum -->
<!ENTITY  cent    CDATA " ¢ " -- cent sign, U+00A2 ISOnum -->
<!ENTITY  pound   CDATA " £ " -- pound sign, U+00A3 ISOnum -->
<!ENTITY  curren  CDATA " ¤ " -- currency sign, U+00A4 ISOnum -->
<!ENTITY  yen    CDATA " ¥ " -- yen sign = yuan sign, U+00A5 ISOnum -->
<!ENTITY  brvbar  CDATA " ¦ " -- broken bar = broken vertical bar,
                                  U+00A6 ISOnum -->
<!ENTITY  sect    CDATA " § " -- section sign, U+00A7 ISOnum -->
<!ENTITY  uml    CDATA " ¨ " -- diaeresis = spacing diaeresis,
                                  U+00A8 ISOdia -->
<!ENTITY  copy    CDATA " © " -- copyright sign, U+00A9 ISOnum -->
<!ENTITY  ordf    CDATA " ª " -- feminine ordinal indicator, U+00AA ISOnum -->
<!ENTITY  laquo   CDATA " « " -- left-pointing double angle quotation mark
                                  = left pointing guillemet, U+00AB ISOnum -->
<!ENTITY  not    CDATA " ¬ " -- not sign, U+00AC ISOnum -->
<!ENTITY  shy    CDATA " ­ " -- soft hyphen = discretionary hyphen,
                                  U+00AD ISOnum -->
<!ENTITY  reg    CDATA " ® " -- registered sign = registered trade mark sign,
                                  U+00AE ISOnum -->
<!ENTITY  macr    CDATA " ¯ " -- macron = spacing macron = overline
                                  = APL overbar, U+00AF ISOdia -->
<!ENTITY  deg    CDATA " ° " -- degree sign, U+00B0 ISOnum -->
<!ENTITY  plusmn  CDATA " ± " -- plus-minus sign = plus-or-minus sign,
                                  U+00B1 ISOnum -->
<!ENTITY  sup2    CDATA " ² " -- superscript two = superscript digit two
                                  = squared, U+00B2 ISOnum -->
<!ENTITY  sup3    CDATA " ³ " -- superscript three = superscript digit three
                                  = cubed, U+00B3 ISOnum -->
<!ENTITY  acute   CDATA " ´ " -- acute accent = spacing acute,
                                  U+00B4 ISOdia -->
<!ENTITY  micro   CDATA " µ " -- micro sign, U+00B5 ISOnum -->
<!ENTITY  para    CDATA "" -- pilcrow sign = paragraph sign,
                                  U+00B6 ISOnum -->
<!ENTITY  middot  CDATA " · " -- middle dot = Georgian comma
                                  = Greek middle dot, U+00B7 ISOnum -->
<!ENTITY  cedil   CDATA " ¸ " -- cedilla = spacing cedilla, U+00B8 ISOdia -->
<!ENTITY  sup1    CDATA " ¹ " -- superscript one = superscript digit one,
                                  U+00B9 ISOnum -->
<!ENTITY  ordm    CDATA " º " -- masculine ordinal indicator,
                                  U+00BA ISOnum -->
<!ENTITY  raquo   CDATA " » " -- right-pointing double angle quotation mark
                                  = right pointing guillemet, U+00BB ISOnum -->
<!ENTITY  frac14  CDATA " ¼ " -- vulgar fraction one quarter
                                  = fraction one quarter, U+00BC ISOnum -->
<!ENTITY  frac12  CDATA " ½ " -- vulgar fraction one half
                                  = fraction one half, U+00BD ISOnum -->
<!ENTITY  frac34  CDATA " ¾ " -- vulgar fraction three quarters
                                  = fraction three quarters, U+00BE ISOnum -->
<!ENTITY  iquest  CDATA " ¿ " -- inverted question mark
                                  = turned question mark, U+00BF ISOnum -->
<!ENTITY  Agrave  CDATA " À " -- latin capital letter A with grave
                                  = latin capital letter A grave,
                                  U+00C0 ISOlat1 -->
<!ENTITY  Aacute  CDATA " Á " -- latin capital letter A with acute,
                                  U+00C1 ISOlat1 -->
<!ENTITY  Acirc   CDATA " Â " -- latin capital letter A with circumflex,
                                  U+00C2 ISOlat1 -->
<!ENTITY  Atilde  CDATA " Ã " -- latin capital letter A with tilde,
                                  U+00C3 ISOlat1 -->
<!ENTITY  Auml    CDATA " Ä " -- latin capital letter A with diaeresis,
                                  U+00C4 ISOlat1 -->
<!ENTITY  Aring   CDATA " Å " -- latin capital letter A with ring above
                                  = latin capital letter A ring,
                                  U+00C5 ISOlat1 -->
<!ENTITY  AElig   CDATA " Æ " -- latin capital letter AE
                                  = latin capital ligature AE,
                                  U+00C6 ISOlat1 -->
<!ENTITY  Ccedil  CDATA " Ç " -- latin capital letter C with cedilla,
                                  U+00C7 ISOlat1 -->
<!ENTITY  Egrave  CDATA " È " -- latin capital letter E with grave,
                                  U+00C8 ISOlat1 -->
<!ENTITY  Eacute  CDATA " É " -- latin capital letter E with acute,
                                  U+00C9 ISOlat1 -->
<!ENTITY  Ecirc   CDATA " Ê " -- latin capital letter E with circumflex,
                                  U+00CA ISOlat1 -->
<!ENTITY  Euml    CDATA " Ë " -- latin capital letter E with diaeresis,
                                  U+00CB ISOlat1 -->
<!ENTITY  Igrave  CDATA " Ì " -- latin capital letter I with grave,
                                  U+00CC ISOlat1 -->
<!ENTITY  Iacute  CDATA " Í " -- latin capital letter I with acute,
                                  U+00CD ISOlat1 -->
<!ENTITY  Icirc   CDATA " Î " -- latin capital letter I with circumflex,
                                  U+00CE ISOlat1 -->
<!ENTITY  Iuml    CDATA " Ï " -- latin capital letter I with diaeresis,
                                  U+00CF ISOlat1 -->
<!ENTITY  ETH    CDATA " Ð " -- latin capital letter ETH, U+00D0 ISOlat1 -->
<!ENTITY  Ntilde  CDATA " Ñ " -- latin capital letter N with tilde,
                                  U+00D1 ISOlat1 -->
<!ENTITY  Ograve  CDATA " Ò " -- latin capital letter O with grave,
                                  U+00D2 ISOlat1 -->
<!ENTITY  Oacute  CDATA " Ó " -- latin capital letter O with acute,
                                  U+00D3 ISOlat1 -->
<!ENTITY  Ocirc   CDATA " Ô " -- latin capital letter O with circumflex,
                                  U+00D4 ISOlat1 -->
<!ENTITY  Otilde  CDATA " Õ " -- latin capital letter O with tilde,
                                  U+00D5 ISOlat1 -->
<!ENTITY  Ouml    CDATA " Ö " -- latin capital letter O with diaeresis,
                                  U+00D6 ISOlat1 -->
<!ENTITY  times   CDATA " × " -- multiplication sign, U+00D7 ISOnum -->
<!ENTITY  Oslash  CDATA " Ø " -- latin capital letter O with stroke
                                  = latin capital letter O slash,
                                  U+00D8 ISOlat1 -->
<!ENTITY  Ugrave  CDATA " Ù " -- latin capital letter U with grave,
                                  U+00D9 ISOlat1 -->
<!ENTITY  Uacute  CDATA " Ú " -- latin capital letter U with acute,
                                  U+00DA ISOlat1 -->
<!ENTITY  Ucirc   CDATA " Û " -- latin capital letter U with circumflex,
                                  U+00DB ISOlat1 -->
<!ENTITY  Uuml    CDATA " Ü " -- latin capital letter U with diaeresis,
                                  U+00DC ISOlat1 -->
<!ENTITY  Yacute  CDATA " Ý " -- latin capital letter Y with acute,
                                  U+00DD ISOlat1 -->
<!ENTITY  THORN   CDATA " Þ " -- latin capital letter THORN,
                                  U+00DE ISOlat1 -->
<!ENTITY  szlig   CDATA " ß " -- latin small letter sharp s = ess-zed,
                                  U+00DF ISOlat1 -->
<!ENTITY  agrave  CDATA " à " -- latin small letter a with grave
                                  = latin small letter a grave,
                                  U+00E0 ISOlat1 -->
<!ENTITY  aacute  CDATA " á " -- latin small letter a with acute,
                                  U+00E1 ISOlat1 -->
<!ENTITY  acirc   CDATA " â " -- latin small letter a with circumflex,
                                  U+00E2 ISOlat1 -->
<!ENTITY  atilde  CDATA " ã " -- latin small letter a with tilde,
                                  U+00E3 ISOlat1 -->
<!ENTITY  auml    CDATA " ä " -- latin small letter a with diaeresis,
                                  U+00E4 ISOlat1 -->
<!ENTITY  aring   CDATA " å " -- latin small letter a with ring above
                                  = latin small letter a ring,
                                  U+00E5 ISOlat1 -->
<!ENTITY  aelig   CDATA " æ " -- latin small letter ae
                                  = latin small ligature ae, U+00E6 ISOlat1 -->
<!ENTITY  ccedil  CDATA " ç " -- latin small letter c with cedilla,
                                  U+00E7 ISOlat1 -->
<!ENTITY  egrave  CDATA " è " -- latin small letter e with grave,
                                  U+00E8 ISOlat1 -->
<!ENTITY  eacute  CDATA " é " -- latin small letter e with acute,
                                  U+00E9 ISOlat1 -->
<!ENTITY  ecirc   CDATA " ê " -- latin small letter e with circumflex,
                                  U+00EA ISOlat1 -->
<!ENTITY  euml    CDATA " ë " -- latin small letter e with diaeresis,
                                  U+00EB ISOlat1 -->
<!ENTITY  igrave  CDATA " ì " -- latin small letter i with grave,
                                  U+00EC ISOlat1 -->
<!ENTITY  iacute  CDATA " í " -- latin small letter i with acute,
                                  U+00ED ISOlat1 -->
<!ENTITY  icirc   CDATA " î " -- latin small letter i with circumflex,
                                  U+00EE ISOlat1 -->
<!ENTITY  iuml    CDATA " ï " -- latin small letter i with diaeresis,
                                  U+00EF ISOlat1 -->
<!ENTITY  eth    CDATA " ð " -- latin small letter eth, U+00F0 ISOlat1 -->
<!ENTITY  ntilde  CDATA " ñ " -- latin small letter n with tilde,
                                  U+00F1 ISOlat1 -->
<!ENTITY  ograve  CDATA " ò " -- latin small letter o with grave,
                                  U+00F2 ISOlat1 -->
<!ENTITY  oacute  CDATA " ó " -- latin small letter o with acute,
                                  U+00F3 ISOlat1 -->
<!ENTITY  ocirc   CDATA " ô " -- latin small letter o with circumflex,
                                  U+00F4 ISOlat1 -->
<!ENTITY  otilde  CDATA " õ " -- latin small letter o with tilde,
                                  U+00F5 ISOlat1 -->
<!ENTITY  ouml    CDATA " ö " -- latin small letter o with diaeresis,
                                  U+00F6 ISOlat1 -->
<!ENTITY  divide  CDATA " ÷ " -- division sign, U+00F7 ISOnum -->
<!ENTITY  oslash  CDATA " ø " -- latin small letter o with stroke,
                                  = latin small letter o slash,
                                  U+00F8 ISOlat1 -->
<!ENTITY  ugrave  CDATA " ù " -- latin small letter u with grave,
                                  U+00F9 ISOlat1 -->
<!ENTITY  uacute  CDATA " ú " -- latin small letter u with acute,
                                  U+00FA ISOlat1 -->
<!ENTITY  ucirc   CDATA " û " -- latin small letter u with circumflex,
                                  U+00FB ISOlat1 -->
<!ENTITY  uuml    CDATA " ü " -- latin small letter u with diaeresis,
                                  U+00FC ISOlat1 -->
<!ENTITY  yacute  CDATA " ý " -- latin small letter y with acute,
                                  U+00FD ISOlat1 -->
<!ENTITY  thorn   CDATA " þ " -- latin small letter thorn,
                                  U+00FE ISOlat1 -->
<!ENTITY  yuml    CDATA " ÿ " -- latin small letter y with diaeresis,
                                  U+00FF ISOlat1 -->

3. 記号、演算子、ギリシア文字

<!-- Latin Extended-B -->

<!ENTITY  fnof     CDATA " ƒ " -- latin small f with hook = function
                                    = florin, U+0192 ISOtech -->

<!-- Greek -->

<!ENTITY  Alpha    CDATA " Α " -- greek capital letter alpha, U+0391 -->
<!ENTITY  Beta     CDATA " Β " -- greek capital letter beta, U+0392 -->
<!ENTITY  Gamma    CDATA " Γ " -- greek capital letter gamma,
                                    U+0393 ISOgrk3 -->
<!ENTITY  Delta    CDATA " Δ " -- greek capital letter delta,
                                    U+0394 ISOgrk3 -->
<!ENTITY  Epsilon   CDATA " Ε " -- greek capital letter epsilon, U+0395 -->
<!ENTITY  Zeta     CDATA " Ζ " -- greek capital letter zeta, U+0396 -->
<!ENTITY  Eta      CDATA " Η " -- greek capital letter eta, U+0397 -->
<!ENTITY  Theta    CDATA " Θ " -- greek capital letter theta,
                                    U+0398 ISOgrk3 -->
<!ENTITY  Iota     CDATA " Ι " -- greek capital letter iota, U+0399 -->
<!ENTITY  Kappa    CDATA " Κ " -- greek capital letter kappa, U+039A -->
<!ENTITY  Lambda    CDATA " Λ " -- greek capital letter lambda,
                                    U+039B ISOgrk3 -->
<!ENTITY  Mu       CDATA " Μ " -- greek capital letter mu, U+039C -->
<!ENTITY  Nu       CDATA " Ν " -- greek capital letter nu, U+039D -->
<!ENTITY  Xi       CDATA " Ξ " -- greek capital letter xi, U+039E ISOgrk3 -->
<!ENTITY  Omicron   CDATA " Ο " -- greek capital letter omicron, U+039F -->
<!ENTITY  Pi       CDATA " Π " -- greek capital letter pi, U+03A0 ISOgrk3 -->
<!ENTITY  Rho      CDATA " Ρ " -- greek capital letter rho, U+03A1 -->
<!-- there is no Sigmaf, and no U+03A2 character either -->
<!ENTITY  Sigma    CDATA " Σ " -- greek capital letter sigma,
                                    U+03A3 ISOgrk3 -->
<!ENTITY  Tau      CDATA " Τ " -- greek capital letter tau, U+03A4 -->
<!ENTITY  Upsilon   CDATA " Υ " -- greek capital letter upsilon,
                                    U+03A5 ISOgrk3 -->
<!ENTITY  Phi      CDATA " Φ " -- greek capital letter phi,
                                    U+03A6 ISOgrk3 -->
<!ENTITY  Chi      CDATA " Χ " -- greek capital letter chi, U+03A7 -->
<!ENTITY  Psi      CDATA " Ψ " -- greek capital letter psi,
                                    U+03A8 ISOgrk3 -->
<!ENTITY  Omega    CDATA " Ω " -- greek capital letter omega,
                                    U+03A9 ISOgrk3 -->

<!ENTITY  alpha    CDATA " α " -- greek small letter alpha,
                                    U+03B1 ISOgrk3 -->
<!ENTITY  beta     CDATA " β " -- greek small letter beta, U+03B2 ISOgrk3 -->
<!ENTITY  gamma    CDATA " γ " -- greek small letter gamma,
                                    U+03B3 ISOgrk3 -->
<!ENTITY  delta    CDATA " δ " -- greek small letter delta,
                                    U+03B4 ISOgrk3 -->
<!ENTITY  epsilon   CDATA " ε " -- greek small letter epsilon,
                                    U+03B5 ISOgrk3 -->
<!ENTITY  zeta     CDATA " ζ " -- greek small letter zeta, U+03B6 ISOgrk3 -->
<!ENTITY  eta      CDATA " η " -- greek small letter eta, U+03B7 ISOgrk3 -->
<!ENTITY  theta    CDATA " θ " -- greek small letter theta,
                                    U+03B8 ISOgrk3 -->
<!ENTITY  iota     CDATA " ι " -- greek small letter iota, U+03B9 ISOgrk3 -->
<!ENTITY  kappa    CDATA " κ " -- greek small letter kappa,
                                    U+03BA ISOgrk3 -->
<!ENTITY  lambda    CDATA " λ " -- greek small letter lambda,
                                    U+03BB ISOgrk3 -->
<!ENTITY  mu       CDATA " μ " -- greek small letter mu, U+03BC ISOgrk3 -->
<!ENTITY  nu       CDATA " ν " -- greek small letter nu, U+03BD ISOgrk3 -->
<!ENTITY  xi       CDATA " ξ " -- greek small letter xi, U+03BE ISOgrk3 -->
<!ENTITY  omicron   CDATA " ο " -- greek small letter omicron, U+03BF NEW -->
<!ENTITY  pi       CDATA " π " -- greek small letter pi, U+03C0 ISOgrk3 -->
<!ENTITY  rho      CDATA " ρ " -- greek small letter rho, U+03C1 ISOgrk3 -->
<!ENTITY  sigmaf    CDATA " ς " -- greek small letter final sigma,
                                    U+03C2 ISOgrk3 -->
<!ENTITY  sigma    CDATA " σ " -- greek small letter sigma,
                                    U+03C3 ISOgrk3 -->
<!ENTITY  tau      CDATA " τ " -- greek small letter tau, U+03C4 ISOgrk3 -->
<!ENTITY  upsilon   CDATA " υ " -- greek small letter upsilon,
                                    U+03C5 ISOgrk3 -->
<!ENTITY  phi      CDATA " φ " -- greek small letter phi, U+03C6 ISOgrk3 -->
<!ENTITY  chi      CDATA " χ " -- greek small letter chi, U+03C7 ISOgrk3 -->
<!ENTITY  psi      CDATA " ψ " -- greek small letter psi, U+03C8 ISOgrk3 -->
<!ENTITY  omega    CDATA " ω " -- greek small letter omega,
                                    U+03C9 ISOgrk3 -->
<!ENTITY  thetasym  CDATA " ϑ " -- greek small letter theta symbol,
                                    U+03D1 NEW -->
<!ENTITY  upsih    CDATA " ϒ " -- greek upsilon with hook symbol,
                                    U+03D2 NEW -->
<!ENTITY  piv      CDATA " ϖ " -- greek pi symbol, U+03D6 ISOgrk3 -->

<!-- General Punctuation -->

<!ENTITY  bull     CDATA "" -- bullet = black small circle,
                                     U+2022 ISOpub  -->
<!-- bullet is NOT the same as bullet operator, U+2219 -->
<!ENTITY  hellip    CDATA "" -- horizontal ellipsis = three dot leader,
                                     U+2026 ISOpub  -->
<!ENTITY  prime    CDATA "" -- prime = minutes = feet, U+2032 ISOtech -->
<!ENTITY  Prime    CDATA "" -- double prime = seconds = inches,
                                     U+2033 ISOtech -->
<!ENTITY  oline    CDATA "" -- overline = spacing overscore,
                                     U+203E NEW -->
<!ENTITY  frasl    CDATA "" -- fraction slash, U+2044 NEW -->

<!-- Letterlike Symbols -->

<!ENTITY  weierp    CDATA "" -- script capital P = power set
                                     = Weierstrass p, U+2118 ISOamso -->
<!ENTITY  image    CDATA "" -- blackletter capital I = imaginary part,
                                     U+2111 ISOamso -->
<!ENTITY  real     CDATA "" -- blackletter capital R = real part symbol,
                                     U+211C ISOamso -->
<!ENTITY  trade    CDATA "" -- trade mark sign, U+2122 ISOnum -->
<!ENTITY  alefsym   CDATA "" -- alef symbol = first transfinite cardinal,
                                     U+2135 NEW -->
<!-- alef symbol is NOT the same as hebrew letter alef,
     U+05D0 although the same glyph could be used to depict both characters -->

<!-- Arrows -->

<!ENTITY  larr     CDATA "" -- leftwards arrow, U+2190 ISOnum -->
<!ENTITY  uarr     CDATA "" -- upwards arrow, U+2191 ISOnum-->
<!ENTITY  rarr     CDATA "" -- rightwards arrow, U+2192 ISOnum -->
<!ENTITY  darr     CDATA "" -- downwards arrow, U+2193 ISOnum -->
<!ENTITY  harr     CDATA "" -- left right arrow, U+2194 ISOamsa -->
<!ENTITY  crarr    CDATA "" -- downwards arrow with corner leftwards
                                     = carriage return, U+21B5 NEW -->
<!ENTITY  lArr     CDATA "" -- leftwards double arrow, U+21D0 ISOtech -->
<!-- ISO 10646 does not say that lArr is the same as the 'is implied by' arrow
    but also does not have any other character for that function. So ? lArr can
    be used for 'is implied by' as ISOtech suggests -->
<!ENTITY  uArr     CDATA "" -- upwards double arrow, U+21D1 ISOamsa -->
<!ENTITY  rArr     CDATA "" -- rightwards double arrow,
                                     U+21D2 ISOtech -->
<!-- ISO 10646 does not say this is the 'implies' character but does not have
     another character with this function so ?
     rArr can be used for 'implies' as ISOtech suggests -->
<!ENTITY  dArr     CDATA "" -- downwards double arrow, U+21D3 ISOamsa -->
<!ENTITY  hArr     CDATA "" -- left right double arrow,
                                     U+21D4 ISOamsa -->

<!-- Mathematical Operators -->

<!ENTITY  forall    CDATA "" -- for all, U+2200 ISOtech -->
<!ENTITY  part     CDATA "" -- partial differential, U+2202 ISOtech  -->
<!ENTITY  exist    CDATA "" -- there exists, U+2203 ISOtech -->
<!ENTITY  empty    CDATA "" -- empty set = null set = diameter,
                                     U+2205 ISOamso -->
<!ENTITY  nabla    CDATA "" -- nabla = backward difference,
                                     U+2207 ISOtech -->
<!ENTITY  isin     CDATA "" -- element of, U+2208 ISOtech -->
<!ENTITY  notin    CDATA "" -- not an element of, U+2209 ISOtech -->
<!ENTITY  ni       CDATA "" -- contains as member, U+220B ISOtech -->
<!-- should there be a more memorable name than 'ni'? -->
<!ENTITY  prod     CDATA "" -- n-ary product = product sign,
                                     U+220F ISOamsb -->
<!-- prod is NOT the same character as U+03A0 'greek capital letter pi' though
     the same glyph might be used for both -->
<!ENTITY  sum      CDATA "" -- n-ary sumation, U+2211 ISOamsb -->
<!-- sum is NOT the same character as U+03A3 'greek capital letter sigma'
     though the same glyph might be used for both -->
<!ENTITY  minus    CDATA "" -- minus sign, U+2212 ISOtech -->
<!ENTITY  lowast    CDATA "" -- asterisk operator, U+2217 ISOtech -->
<!ENTITY  radic    CDATA "" -- square root = radical sign,
                                     U+221A ISOtech -->
<!ENTITY  prop     CDATA "" -- proportional to, U+221D ISOtech -->
<!ENTITY  infin    CDATA "" -- infinity, U+221E ISOtech -->
<!ENTITY  ang      CDATA "" -- angle, U+2220 ISOamso -->
<!ENTITY  and      CDATA "" -- logical and = wedge, U+2227 ISOtech -->
<!ENTITY  or       CDATA "" -- logical or = vee, U+2228 ISOtech -->
<!ENTITY  cap      CDATA "" -- intersection = cap, U+2229 ISOtech -->
<!ENTITY  cup      CDATA "" -- union = cup, U+222A ISOtech -->
<!ENTITY  int      CDATA "" -- integral, U+222B ISOtech -->
<!ENTITY  there4    CDATA "" -- therefore, U+2234 ISOtech -->
<!ENTITY  sim      CDATA "" -- tilde operator = varies with = similar to,
                                     U+223C ISOtech -->
<!-- tilde operator is NOT the same character as the tilde, U+007E,
     although the same glyph might be used to represent both  -->
<!ENTITY  cong     CDATA "" -- approximately equal to, U+2245 ISOtech -->
<!ENTITY  asymp    CDATA "" -- almost equal to = asymptotic to,
                                     U+2248 ISOamsr -->
<!ENTITY  ne       CDATA "" -- not equal to, U+2260 ISOtech -->
<!ENTITY  equiv    CDATA "" -- identical to, U+2261 ISOtech -->
<!ENTITY  le       CDATA "" -- less-than or equal to, U+2264 ISOtech -->
<!ENTITY  ge       CDATA "" -- greater-than or equal to,
                                     U+2265 ISOtech -->
<!ENTITY  sub      CDATA "" -- subset of, U+2282 ISOtech -->
<!ENTITY  sup      CDATA "" -- superset of, U+2283 ISOtech -->
<!-- note that nsup, 'not a superset of, U+2283' is not covered by the Symbol
     font encoding and is not included. Should it be, for symmetry?
     It is in ISOamsn  -->
<!ENTITY  nsub     CDATA "" -- not a subset of, U+2284 ISOamsn -->
<!ENTITY  sube     CDATA "" -- subset of or equal to, U+2286 ISOtech -->
<!ENTITY  supe     CDATA "" -- superset of or equal to,
                                     U+2287 ISOtech -->
<!ENTITY  oplus    CDATA "" -- circled plus = direct sum,
                                     U+2295 ISOamsb -->
<!ENTITY  otimes    CDATA "" -- circled times = vector product,
                                     U+2297 ISOamsb -->
<!ENTITY  perp     CDATA "" -- up tack = orthogonal to = perpendicular,
                                     U+22A5 ISOtech -->
<!ENTITY  sdot     CDATA "" -- dot operator, U+22C5 ISOamsb -->
<!-- dot operator is NOT the same character as U+00B7 middle dot -->

<!-- Miscellaneous Technical -->

<!ENTITY  lceil    CDATA "" -- left ceiling = apl upstile,
                                     U+2308 ISOamsc  -->
<!ENTITY  rceil    CDATA "" -- right ceiling, U+2309 ISOamsc  -->
<!ENTITY  lfloor    CDATA "" -- left floor = apl downstile,
                                     U+230A ISOamsc  -->
<!ENTITY  rfloor    CDATA "" -- right floor, U+230B ISOamsc  -->
<!ENTITY  lang     CDATA "" -- left-pointing angle bracket = bra,
                                     U+2329 ISOtech -->
<!-- lang is NOT the same character as U+003C 'less than'
     or U+2039 'single left-pointing angle quotation mark' -->
<!ENTITY  rang     CDATA "" -- right-pointing angle bracket = ket,
                                     U+232A ISOtech -->
<!-- rang is NOT the same character as U+003E 'greater than'
     or U+203A 'single right-pointing angle quotation mark' -->

<!-- Geometric Shapes -->

<!ENTITY  loz      CDATA "" -- lozenge, U+25CA ISOpub -->

<!-- Miscellaneous Symbols -->

<!ENTITY  spades    CDATA "" -- black spade suit, U+2660 ISOpub -->
<!-- black here seems to mean filled as opposed to hollow -->
<!ENTITY  clubs    CDATA "" -- black club suit = shamrock,
                                     U+2663 ISOpub -->
<!ENTITY  hearts    CDATA "" -- black heart suit = valentine,
                                     U+2665 ISOpub -->
<!ENTITY  diams    CDATA "" -- black diamond suit, U+2666 ISOpub -->

4. その他の特殊文字

<!-- C0 Controls and Basic Latin -->

<!ENTITY  quot    CDATA " " "   -- quotation mark = APL quote,
                                    U+0022 ISOnum -->
<!ENTITY  amp     CDATA " & "   -- ampersand, U+0026 ISOnum -->
<!ENTITY  lt      CDATA " < "   -- less-than sign, U+003C ISOnum -->
<!ENTITY  gt      CDATA " > "   -- greater-than sign, U+003E ISOnum -->

<!-- Latin Extended-A -->

<!ENTITY  OElig    CDATA " Π"  -- latin capital ligature OE,
                                    U+0152 ISOlat2 -->
<!ENTITY  oelig    CDATA " œ "  -- latin small ligature oe, U+0153 ISOlat2 -->
<!-- ligature is a misnomer, this is a separate character in some languages -->
<!ENTITY  Scaron   CDATA " Š "  -- latin capital letter S with caron,
                                    U+0160 ISOlat2 -->
<!ENTITY  scaron   CDATA " š "  -- latin small letter s with caron,
                                    U+0161 ISOlat2 -->
<!ENTITY  Yuml    CDATA " Ÿ "  -- latin capital letter Y with diaeresis,
                                    U+0178 ISOlat2 -->

<!-- Spacing Modifier Letters -->

<!ENTITY  circ    CDATA " ˆ "  -- modifier letter circumflex accent,
                                    U+02C6 ISOpub -->
<!ENTITY  tilde    CDATA " ˜ "  -- small tilde, U+02DC ISOdia -->

<!-- General Punctuation -->

<!ENTITY  ensp    CDATA "" -- en space, U+2002 ISOpub -->
<!ENTITY  emsp    CDATA "" -- em space, U+2003 ISOpub -->
<!ENTITY  thinsp   CDATA "" -- thin space, U+2009 ISOpub -->
<!ENTITY  zwnj    CDATA "" -- zero width non-joiner,
                                    U+200C NEW RFC 2070 -->
<!ENTITY  zwj     CDATA "" -- zero width joiner, U+200D NEW RFC 2070 -->
<!ENTITY  lrm     CDATA "" -- left-to-right mark, U+200E NEW RFC 2070 -->
<!ENTITY  rlm     CDATA "" -- right-to-left mark, U+200F NEW RFC 2070 -->
<!ENTITY  ndash    CDATA "" -- en dash, U+2013 ISOpub -->
<!ENTITY  mdash    CDATA "" -- em dash, U+2014 ISOpub -->
<!ENTITY  lsquo    CDATA "" -- left single quotation mark,
                                    U+2018 ISOnum -->
<!ENTITY  rsquo    CDATA "" -- right single quotation mark,
                                    U+2019 ISOnum -->
<!ENTITY  sbquo    CDATA "" -- single low-9 quotation mark, U+201A NEW -->
<!ENTITY  ldquo    CDATA "" -- left double quotation mark,
                                    U+201C ISOnum -->
<!ENTITY  rdquo    CDATA "" -- right double quotation mark,
                                    U+201D ISOnum -->
<!ENTITY  bdquo    CDATA "" -- double low-9 quotation mark, U+201E NEW -->
<!ENTITY  dagger   CDATA "" -- dagger, U+2020 ISOpub -->
<!ENTITY  Dagger   CDATA "" -- double dagger, U+2021 ISOpub -->
<!ENTITY  permil   CDATA "" -- per mille sign, U+2030 ISOtech -->
<!ENTITY  lsaquo   CDATA "" -- single left-pointing angle quotation mark,
                                    U+2039 ISO proposed -->
<!-- lsaquo is proposed but not yet ISO standardized -->
<!ENTITY  rsaquo   CDATA "" -- single right-pointing angle quotation mark,
                                    U+203A ISO proposed -->
<!-- rsaquo is proposed but not yet ISO standardized -->
<!ENTITY  euro     CDATA ""  -- euro sign, U+20AC NEW -->

END

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