extension PureXML.HTML.Tokenizer {
    /// The HTML 4.01 named character references (the `lat1`, `special`, and
    /// `symbol` entity sets), keyed by the bare entity name. This is the stable,
    /// fully-specified set (the same coverage libxml2 ships); the much larger
    /// WHATWG superset of mostly-astral mathematical references is not included.
    /// The decoder treats the trailing semicolon as optional (lenient tag soup).
    static let namedEntities: [String: Character] = [
        // ISO-8859-1 (Latin-1) supplement.
        "nbsp": "\u{00A0}", "iexcl": "\u{00A1}", "cent": "\u{00A2}", "pound": "\u{00A3}",
        "curren": "\u{00A4}", "yen": "\u{00A5}", "brvbar": "\u{00A6}", "sect": "\u{00A7}",
        "uml": "\u{00A8}", "copy": "\u{00A9}", "ordf": "\u{00AA}", "laquo": "\u{00AB}",
        "not": "\u{00AC}", "shy": "\u{00AD}", "reg": "\u{00AE}", "macr": "\u{00AF}",
        "deg": "\u{00B0}", "plusmn": "\u{00B1}", "sup2": "\u{00B2}", "sup3": "\u{00B3}",
        "acute": "\u{00B4}", "micro": "\u{00B5}", "para": "\u{00B6}", "middot": "\u{00B7}",
        "cedil": "\u{00B8}", "sup1": "\u{00B9}", "ordm": "\u{00BA}", "raquo": "\u{00BB}",
        "frac14": "\u{00BC}", "frac12": "\u{00BD}", "frac34": "\u{00BE}", "iquest": "\u{00BF}",
        "Agrave": "\u{00C0}", "Aacute": "\u{00C1}", "Acirc": "\u{00C2}", "Atilde": "\u{00C3}",
        "Auml": "\u{00C4}", "Aring": "\u{00C5}", "AElig": "\u{00C6}", "Ccedil": "\u{00C7}",
        "Egrave": "\u{00C8}", "Eacute": "\u{00C9}", "Ecirc": "\u{00CA}", "Euml": "\u{00CB}",
        "Igrave": "\u{00CC}", "Iacute": "\u{00CD}", "Icirc": "\u{00CE}", "Iuml": "\u{00CF}",
        "ETH": "\u{00D0}", "Ntilde": "\u{00D1}", "Ograve": "\u{00D2}", "Oacute": "\u{00D3}",
        "Ocirc": "\u{00D4}", "Otilde": "\u{00D5}", "Ouml": "\u{00D6}", "times": "\u{00D7}",
        "Oslash": "\u{00D8}", "Ugrave": "\u{00D9}", "Uacute": "\u{00DA}", "Ucirc": "\u{00DB}",
        "Uuml": "\u{00DC}", "Yacute": "\u{00DD}", "THORN": "\u{00DE}", "szlig": "\u{00DF}",
        "agrave": "\u{00E0}", "aacute": "\u{00E1}", "acirc": "\u{00E2}", "atilde": "\u{00E3}",
        "auml": "\u{00E4}", "aring": "\u{00E5}", "aelig": "\u{00E6}", "ccedil": "\u{00E7}",
        "egrave": "\u{00E8}", "eacute": "\u{00E9}", "ecirc": "\u{00EA}", "euml": "\u{00EB}",
        "igrave": "\u{00EC}", "iacute": "\u{00ED}", "icirc": "\u{00EE}", "iuml": "\u{00EF}",
        "eth": "\u{00F0}", "ntilde": "\u{00F1}", "ograve": "\u{00F2}", "oacute": "\u{00F3}",
        "ocirc": "\u{00F4}", "otilde": "\u{00F5}", "ouml": "\u{00F6}", "divide": "\u{00F7}",
        "oslash": "\u{00F8}", "ugrave": "\u{00F9}", "uacute": "\u{00FA}", "ucirc": "\u{00FB}",
        "uuml": "\u{00FC}", "yacute": "\u{00FD}", "thorn": "\u{00FE}", "yuml": "\u{00FF}",
        // Special: markup-significant, quotes, dashes, and spacing.
        "quot": "\u{0022}", "amp": "\u{0026}", "apos": "\u{0027}", "lt": "\u{003C}", "gt": "\u{003E}",
        "OElig": "\u{0152}", "oelig": "\u{0153}", "Scaron": "\u{0160}", "scaron": "\u{0161}",
        "Yuml": "\u{0178}", "circ": "\u{02C6}", "tilde": "\u{02DC}", "ensp": "\u{2002}",
        "emsp": "\u{2003}", "thinsp": "\u{2009}", "zwnj": "\u{200C}", "zwj": "\u{200D}",
        "lrm": "\u{200E}", "rlm": "\u{200F}", "ndash": "\u{2013}", "mdash": "\u{2014}",
        "lsquo": "\u{2018}", "rsquo": "\u{2019}", "sbquo": "\u{201A}", "ldquo": "\u{201C}",
        "rdquo": "\u{201D}", "bdquo": "\u{201E}", "dagger": "\u{2020}", "Dagger": "\u{2021}",
        "permil": "\u{2030}", "lsaquo": "\u{2039}", "rsaquo": "\u{203A}", "euro": "\u{20AC}",
        // Symbols: Greek letters, mathematical operators, arrows, and card suits.
        "fnof": "\u{0192}", "Alpha": "\u{0391}", "Beta": "\u{0392}", "Gamma": "\u{0393}",
        "Delta": "\u{0394}", "Epsilon": "\u{0395}", "Zeta": "\u{0396}", "Eta": "\u{0397}",
        "Theta": "\u{0398}", "Iota": "\u{0399}", "Kappa": "\u{039A}", "Lambda": "\u{039B}",
        "Mu": "\u{039C}", "Nu": "\u{039D}", "Xi": "\u{039E}", "Omicron": "\u{039F}",
        "Pi": "\u{03A0}", "Rho": "\u{03A1}", "Sigma": "\u{03A3}", "Tau": "\u{03A4}",
        "Upsilon": "\u{03A5}", "Phi": "\u{03A6}", "Chi": "\u{03A7}", "Psi": "\u{03A8}",
        "Omega": "\u{03A9}", "alpha": "\u{03B1}", "beta": "\u{03B2}", "gamma": "\u{03B3}",
        "delta": "\u{03B4}", "epsilon": "\u{03B5}", "zeta": "\u{03B6}", "eta": "\u{03B7}",
        "theta": "\u{03B8}", "iota": "\u{03B9}", "kappa": "\u{03BA}", "lambda": "\u{03BB}",
        "mu": "\u{03BC}", "nu": "\u{03BD}", "xi": "\u{03BE}", "omicron": "\u{03BF}",
        "pi": "\u{03C0}", "rho": "\u{03C1}", "sigmaf": "\u{03C2}", "sigma": "\u{03C3}",
        "tau": "\u{03C4}", "upsilon": "\u{03C5}", "phi": "\u{03C6}", "chi": "\u{03C7}",
        "psi": "\u{03C8}", "omega": "\u{03C9}", "thetasym": "\u{03D1}", "upsih": "\u{03D2}",
        "piv": "\u{03D6}", "bull": "\u{2022}", "hellip": "\u{2026}", "prime": "\u{2032}",
        "Prime": "\u{2033}", "oline": "\u{203E}", "frasl": "\u{2044}", "weierp": "\u{2118}",
        "image": "\u{2111}", "real": "\u{211C}", "trade": "\u{2122}", "alefsym": "\u{2135}",
        "larr": "\u{2190}", "uarr": "\u{2191}", "rarr": "\u{2192}", "darr": "\u{2193}",
        "harr": "\u{2194}", "crarr": "\u{21B5}", "lArr": "\u{21D0}", "uArr": "\u{21D1}",
        "rArr": "\u{21D2}", "dArr": "\u{21D3}", "hArr": "\u{21D4}", "forall": "\u{2200}",
        "part": "\u{2202}", "exist": "\u{2203}", "empty": "\u{2205}", "nabla": "\u{2207}",
        "isin": "\u{2208}", "notin": "\u{2209}", "ni": "\u{220B}", "prod": "\u{220F}",
        "sum": "\u{2211}", "minus": "\u{2212}", "lowast": "\u{2217}", "radic": "\u{221A}",
        "prop": "\u{221D}", "infin": "\u{221E}", "ang": "\u{2220}", "and": "\u{2227}",
        "or": "\u{2228}", "cap": "\u{2229}", "cup": "\u{222A}", "int": "\u{222B}",
        "there4": "\u{2234}", "sim": "\u{223C}", "cong": "\u{2245}", "asymp": "\u{2248}",
        "ne": "\u{2260}", "equiv": "\u{2261}", "le": "\u{2264}", "ge": "\u{2265}",
        "sub": "\u{2282}", "sup": "\u{2283}", "nsub": "\u{2284}", "sube": "\u{2286}",
        "supe": "\u{2287}", "oplus": "\u{2295}", "otimes": "\u{2297}", "perp": "\u{22A5}",
        "sdot": "\u{22C5}", "lceil": "\u{2308}", "rceil": "\u{2309}", "lfloor": "\u{230A}",
        "rfloor": "\u{230B}", "lang": "\u{2329}", "rang": "\u{232A}", "loz": "\u{25CA}",
        "spades": "\u{2660}", "clubs": "\u{2663}", "hearts": "\u{2665}", "diams": "\u{2666}",
    ]
}