文字実体参照というのは、SGMLの概念で、文書文字集合中に含まれる文字をコードで参照する手法です。
HTML4.0は、複数の実体参照セットをサポートしています。
以下では、これら文字実体参照の完全な一覧を示します。[ISO10646]では各文字の名前が大文字で記されていますが、読みやすさを考え、この仕様書では小文字で記します。
この節の文字実体参照が掲げる各文字の数値文字参照による一覧は、既にHTML 2.0準拠のユーザエージェントには実装されているはずです。けれども、例えば割り算の記号「÷」を表そうとする場合、名前による文字実体参照「÷」の方が数値文字参照で「÷」よりも分かりやすいでしょう。
この文字実体参照をサポートしようとするユーザエージェントは、単に実体名を認識しかつ[ISO88591]の文字目録<repertoire>に含まれる文字へと変換する機能さえ持てば十分です。
コード65533（十六進ではFFFD）の文字が、UCS-2で許される最後の文字です。コード65534（十六進でFFFE）は文字の割り振りがなされておらず、また低位バイトと高位バイトが入れ替わった場合の「ZERO WIDTH NON-BREAKING SPACE」がこのように表されてしまうため、バイト順の確認用に予約されているコードポイントとなっています。コード65535（十六進でFFFF）には文字の割り振りはありません。
<!-- Portions © International Organization for Standardization 1986
Permission to copy in any form is granted for use with
conforming SGML systems and applications as defined in
ISO 8879, provided this notice is included in all copies.
-->
<!-- Character entity set. Typical invocation:
<!ENTITY % HTMLlat1 PUBLIC
"-//W3C//ENTITIES Latin 1//EN//HTML">
%HTMLlat1;
-->
<!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 with,
U+00FE ISOlat1 -->
<!ENTITY yuml CDATA "ÿ" -- latin small letter y with diaeresis,
U+00FF ISOlat1 -->
この節の文字実体参照が扱う文字は、例えば主にアドビSymbolフォントに含まれている、ギリシア文字、ブラケット類、そして数学記号の中の、勾配、積、求和などの記号です。
これらの文字実体を扱う場合、ユーザエージェントは、[ISO10646]を完全サポートするか、または代替手段をサポートするか、どちらの方法によってもかまいません。これらの文字実体を目に見える字形として画像表示するには、[ISO10646]文字集合の文字を表示する能力をユーザエージェント自身が持つことにするか、または、下記一覧の実体、数値文字参照と、要求される字形を表現できるフォントとの間の対応付けを行えるようにするか、のどちらかの能力が必要となります。
ギリシア文字について。 この文字実体は現代ギリシア語の表記に使われているアルファベットをすべて含みます。けれども、句読点、アクセント記号をつけられた文字、アクセント付き文字を生成するために必要なアクセント記号（tonoやdialytika）などは含みません。また古代文字、コプト文字、Polytonicなギリシア語表記に必要な合成済み文字、なども含みません。この仕様が定めるギリシア文字は、現代ギリシア語の文章を表記することを目的としてはおらず（また不十分な表記しか行えませんが）、工学系や数学系の文章でギリシア文字が必要となる場合のことを想定して定められています。
<!-- Mathematical, Greek and Symbolic characters for HTML -->
<!-- Character entity set. Typical invocation:
<!ENTITY % HTMLsymbol PUBLIC
"-//W3C//ENTITIES Symbols//EN//HTML">
%HTMLsymbol; -->
<!-- Portions © International Organization for Standardization 1986:
Permission to copy in any form is granted for use with
conforming SGML systems and applications as defined in
ISO 8879, provided this notice is included in all copies.
-->
<!-- Relevant ISO entity set is given unless names are newly introduced.
New names (i.e., not in ISO 8879 list) do not clash with any
existing ISO 8879 entity names. ISO 10646 character numbers
are given for each character, in hex. CDATA values are decimal
conversions of the ISO 10646 values and refer to the document
character set. Names are Unicode 2.0 names.
-->
<!-- 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 "ℑ" -- blackletter capital I = imaginary part,
U+2111 ISOamso -->
<!ENTITY real CDATA "ℜ" -- blackletter capital R = real part symbol,
U+211C ISOamso -->
<!ENTITY trade CDATA "™" -- trade mark sign, U+2122 ISOnum -->
<!ENTITY alefsym CDATA "ℵ" -- 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 -->
<!-- Unicode 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 -->
<!-- Unicode 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 -->
この節で扱う文字実体参照は、マークアップ記号として使われる文字を地の文として使うためのもの（HTML2.0、3.2、からの変更点は無し）と、空白文字、ダッシュを記すためのものです。さらに、双方向書字テキストの方向性を明確化するための制御文字（詳しくは該当の章を参照のこと）などの国際化を考慮した文字が含まれます。
この節の文字実体の残りの部分は、[IBM特殊文字である] CP-1252に含まれていて、HTMLlat1やHTMLsymbol文字集合に含まれていない西欧言語用文字で、CP-1252文字集合のコード128から159に相当する部分です。これらの文字は文字参照によって表記することによって、機種依存を免れる方法で文中に記すことができるようになります。
これらの文字実体を扱う場合、ユーザエージェントは、[ISO10646]を完全サポートするか、または代替手段をサポートするか、どちらの方法によってもかまいません。これらの文字実体を目に見える字形として画像表示するには、[ISO10646]文字集合の文字を表示する能力をユーザエージェント自身が持つことにするか、または、下記一覧の実体、数値文字参照と、要求される字形を表現できるフォントとの間の対応付けを行えるようにするか、のどちらかの能力が必要となります。
<!-- Special characters for HTML -->
<!-- Character entity set. Typical invocation:
<!ENTITY % HTMLspecial PUBLIC
"-//W3C//ENTITIES Special//EN//HTML">
%HTMLspecial; -->
<!-- Portions © International Organization for Standardization 1986:
Permission to copy in any form is granted for use with
conforming SGML systems and applications as defined in
ISO 8879, provided this notice is included in all copies.
-->
<!-- Relevant ISO entity set is given unless names are newly introduced.
New names (i.e., not in ISO 8879 list) do not clash with any
existing ISO 8879 entity names. ISO 10646 character numbers
are given for each character, in hex. CDATA values are decimal
conversions of the ISO 10646 values and refer to the document
character set. Names are Unicode 2.0 names.
-->
<!-- 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 "Œ" -- 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 -->