diff --git a/Utilities/CMakeLists.txt b/Utilities/CMakeLists.txt
index ecae7b0c9..4aa87196a 100644
--- a/Utilities/CMakeLists.txt
+++ b/Utilities/CMakeLists.txt
@@ -138,8 +138,16 @@ if(BUILD_TESTING)
   endif()
   mark_as_advanced(LIBXML2_XMLLINT_EXECUTABLE)
   if(LIBXML2_XMLLINT_EXECUTABLE)
+    # We provide the XHTML DTD and its dependencies in the 'xml'
+    # directory so that xmllint can run without network access.
+    # However, it's --path option accepts a space-separated list of
+    # paths so it cannot handle spaces in the path to the source tree.
+    # Therefore we run the tool with the current work directory set to
+    # the 'xml' directory and use '.' as the path.
     add_test(CMake.HTML
-      ${LIBXML2_XMLLINT_EXECUTABLE} --valid --noout ${HTML_FILES}
+      ${CMAKE_CMAKE_COMMAND} -E chdir ${CMAKE_CURRENT_SOURCE_DIR}/xml
+      ${LIBXML2_XMLLINT_EXECUTABLE} --valid --noout --nonet --path .
+      ${HTML_FILES}
       )
   endif()
 endif()
diff --git a/Utilities/xml/xhtml-lat1.ent b/Utilities/xml/xhtml-lat1.ent
new file mode 100644
index 000000000..ffee223eb
--- /dev/null
+++ b/Utilities/xml/xhtml-lat1.ent
@@ -0,0 +1,196 @@
+<!-- Portions (C) 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 for XHTML//EN"
+       "http://www.w3.org/TR/xhtml1/DTD/xhtml-lat1.ent">
+    %HTMLlat1;
+-->
+
+<!ENTITY nbsp   "&#160;"> <!-- no-break space = non-breaking space,
+                                  U+00A0 ISOnum -->
+<!ENTITY iexcl  "&#161;"> <!-- inverted exclamation mark, U+00A1 ISOnum -->
+<!ENTITY cent   "&#162;"> <!-- cent sign, U+00A2 ISOnum -->
+<!ENTITY pound  "&#163;"> <!-- pound sign, U+00A3 ISOnum -->
+<!ENTITY curren "&#164;"> <!-- currency sign, U+00A4 ISOnum -->
+<!ENTITY yen    "&#165;"> <!-- yen sign = yuan sign, U+00A5 ISOnum -->
+<!ENTITY brvbar "&#166;"> <!-- broken bar = broken vertical bar,
+                                  U+00A6 ISOnum -->
+<!ENTITY sect   "&#167;"> <!-- section sign, U+00A7 ISOnum -->
+<!ENTITY uml    "&#168;"> <!-- diaeresis = spacing diaeresis,
+                                  U+00A8 ISOdia -->
+<!ENTITY copy   "&#169;"> <!-- copyright sign, U+00A9 ISOnum -->
+<!ENTITY ordf   "&#170;"> <!-- feminine ordinal indicator, U+00AA ISOnum -->
+<!ENTITY laquo  "&#171;"> <!-- left-pointing double angle quotation mark
+                                  = left pointing guillemet, U+00AB ISOnum -->
+<!ENTITY not    "&#172;"> <!-- not sign = angled dash,
+                                  U+00AC ISOnum -->
+<!ENTITY shy    "&#173;"> <!-- soft hyphen = discretionary hyphen,
+                                  U+00AD ISOnum -->
+<!ENTITY reg    "&#174;"> <!-- registered sign = registered trade mark sign,
+                                  U+00AE ISOnum -->
+<!ENTITY macr   "&#175;"> <!-- macron = spacing macron = overline
+                                  = APL overbar, U+00AF ISOdia -->
+<!ENTITY deg    "&#176;"> <!-- degree sign, U+00B0 ISOnum -->
+<!ENTITY plusmn "&#177;"> <!-- plus-minus sign = plus-or-minus sign,
+                                  U+00B1 ISOnum -->
+<!ENTITY sup2   "&#178;"> <!-- superscript two = superscript digit two
+                                  = squared, U+00B2 ISOnum -->
+<!ENTITY sup3   "&#179;"> <!-- superscript three = superscript digit three
+                                  = cubed, U+00B3 ISOnum -->
+<!ENTITY acute  "&#180;"> <!-- acute accent = spacing acute,
+                                  U+00B4 ISOdia -->
+<!ENTITY micro  "&#181;"> <!-- micro sign, U+00B5 ISOnum -->
+<!ENTITY para   "&#182;"> <!-- pilcrow sign = paragraph sign,
+                                  U+00B6 ISOnum -->
+<!ENTITY middot "&#183;"> <!-- middle dot = Georgian comma
+                                  = Greek middle dot, U+00B7 ISOnum -->
+<!ENTITY cedil  "&#184;"> <!-- cedilla = spacing cedilla, U+00B8 ISOdia -->
+<!ENTITY sup1   "&#185;"> <!-- superscript one = superscript digit one,
+                                  U+00B9 ISOnum -->
+<!ENTITY ordm   "&#186;"> <!-- masculine ordinal indicator,
+                                  U+00BA ISOnum -->
+<!ENTITY raquo  "&#187;"> <!-- right-pointing double angle quotation mark
+                                  = right pointing guillemet, U+00BB ISOnum -->
+<!ENTITY frac14 "&#188;"> <!-- vulgar fraction one quarter
+                                  = fraction one quarter, U+00BC ISOnum -->
+<!ENTITY frac12 "&#189;"> <!-- vulgar fraction one half
+                                  = fraction one half, U+00BD ISOnum -->
+<!ENTITY frac34 "&#190;"> <!-- vulgar fraction three quarters
+                                  = fraction three quarters, U+00BE ISOnum -->
+<!ENTITY iquest "&#191;"> <!-- inverted question mark
+                                  = turned question mark, U+00BF ISOnum -->
+<!ENTITY Agrave "&#192;"> <!-- latin capital letter A with grave
+                                  = latin capital letter A grave,
+                                  U+00C0 ISOlat1 -->
+<!ENTITY Aacute "&#193;"> <!-- latin capital letter A with acute,
+                                  U+00C1 ISOlat1 -->
+<!ENTITY Acirc  "&#194;"> <!-- latin capital letter A with circumflex,
+                                  U+00C2 ISOlat1 -->
+<!ENTITY Atilde "&#195;"> <!-- latin capital letter A with tilde,
+                                  U+00C3 ISOlat1 -->
+<!ENTITY Auml   "&#196;"> <!-- latin capital letter A with diaeresis,
+                                  U+00C4 ISOlat1 -->
+<!ENTITY Aring  "&#197;"> <!-- latin capital letter A with ring above
+                                  = latin capital letter A ring,
+                                  U+00C5 ISOlat1 -->
+<!ENTITY AElig  "&#198;"> <!-- latin capital letter AE
+                                  = latin capital ligature AE,
+                                  U+00C6 ISOlat1 -->
+<!ENTITY Ccedil "&#199;"> <!-- latin capital letter C with cedilla,
+                                  U+00C7 ISOlat1 -->
+<!ENTITY Egrave "&#200;"> <!-- latin capital letter E with grave,
+                                  U+00C8 ISOlat1 -->
+<!ENTITY Eacute "&#201;"> <!-- latin capital letter E with acute,
+                                  U+00C9 ISOlat1 -->
+<!ENTITY Ecirc  "&#202;"> <!-- latin capital letter E with circumflex,
+                                  U+00CA ISOlat1 -->
+<!ENTITY Euml   "&#203;"> <!-- latin capital letter E with diaeresis,
+                                  U+00CB ISOlat1 -->
+<!ENTITY Igrave "&#204;"> <!-- latin capital letter I with grave,
+                                  U+00CC ISOlat1 -->
+<!ENTITY Iacute "&#205;"> <!-- latin capital letter I with acute,
+                                  U+00CD ISOlat1 -->
+<!ENTITY Icirc  "&#206;"> <!-- latin capital letter I with circumflex,
+                                  U+00CE ISOlat1 -->
+<!ENTITY Iuml   "&#207;"> <!-- latin capital letter I with diaeresis,
+                                  U+00CF ISOlat1 -->
+<!ENTITY ETH    "&#208;"> <!-- latin capital letter ETH, U+00D0 ISOlat1 -->
+<!ENTITY Ntilde "&#209;"> <!-- latin capital letter N with tilde,
+                                  U+00D1 ISOlat1 -->
+<!ENTITY Ograve "&#210;"> <!-- latin capital letter O with grave,
+                                  U+00D2 ISOlat1 -->
+<!ENTITY Oacute "&#211;"> <!-- latin capital letter O with acute,
+                                  U+00D3 ISOlat1 -->
+<!ENTITY Ocirc  "&#212;"> <!-- latin capital letter O with circumflex,
+                                  U+00D4 ISOlat1 -->
+<!ENTITY Otilde "&#213;"> <!-- latin capital letter O with tilde,
+                                  U+00D5 ISOlat1 -->
+<!ENTITY Ouml   "&#214;"> <!-- latin capital letter O with diaeresis,
+                                  U+00D6 ISOlat1 -->
+<!ENTITY times  "&#215;"> <!-- multiplication sign, U+00D7 ISOnum -->
+<!ENTITY Oslash "&#216;"> <!-- latin capital letter O with stroke
+                                  = latin capital letter O slash,
+                                  U+00D8 ISOlat1 -->
+<!ENTITY Ugrave "&#217;"> <!-- latin capital letter U with grave,
+                                  U+00D9 ISOlat1 -->
+<!ENTITY Uacute "&#218;"> <!-- latin capital letter U with acute,
+                                  U+00DA ISOlat1 -->
+<!ENTITY Ucirc  "&#219;"> <!-- latin capital letter U with circumflex,
+                                  U+00DB ISOlat1 -->
+<!ENTITY Uuml   "&#220;"> <!-- latin capital letter U with diaeresis,
+                                  U+00DC ISOlat1 -->
+<!ENTITY Yacute "&#221;"> <!-- latin capital letter Y with acute,
+                                  U+00DD ISOlat1 -->
+<!ENTITY THORN  "&#222;"> <!-- latin capital letter THORN,
+                                  U+00DE ISOlat1 -->
+<!ENTITY szlig  "&#223;"> <!-- latin small letter sharp s = ess-zed,
+                                  U+00DF ISOlat1 -->
+<!ENTITY agrave "&#224;"> <!-- latin small letter a with grave
+                                  = latin small letter a grave,
+                                  U+00E0 ISOlat1 -->
+<!ENTITY aacute "&#225;"> <!-- latin small letter a with acute,
+                                  U+00E1 ISOlat1 -->
+<!ENTITY acirc  "&#226;"> <!-- latin small letter a with circumflex,
+                                  U+00E2 ISOlat1 -->
+<!ENTITY atilde "&#227;"> <!-- latin small letter a with tilde,
+                                  U+00E3 ISOlat1 -->
+<!ENTITY auml   "&#228;"> <!-- latin small letter a with diaeresis,
+                                  U+00E4 ISOlat1 -->
+<!ENTITY aring  "&#229;"> <!-- latin small letter a with ring above
+                                  = latin small letter a ring,
+                                  U+00E5 ISOlat1 -->
+<!ENTITY aelig  "&#230;"> <!-- latin small letter ae
+                                  = latin small ligature ae, U+00E6 ISOlat1 -->
+<!ENTITY ccedil "&#231;"> <!-- latin small letter c with cedilla,
+                                  U+00E7 ISOlat1 -->
+<!ENTITY egrave "&#232;"> <!-- latin small letter e with grave,
+                                  U+00E8 ISOlat1 -->
+<!ENTITY eacute "&#233;"> <!-- latin small letter e with acute,
+                                  U+00E9 ISOlat1 -->
+<!ENTITY ecirc  "&#234;"> <!-- latin small letter e with circumflex,
+                                  U+00EA ISOlat1 -->
+<!ENTITY euml   "&#235;"> <!-- latin small letter e with diaeresis,
+                                  U+00EB ISOlat1 -->
+<!ENTITY igrave "&#236;"> <!-- latin small letter i with grave,
+                                  U+00EC ISOlat1 -->
+<!ENTITY iacute "&#237;"> <!-- latin small letter i with acute,
+                                  U+00ED ISOlat1 -->
+<!ENTITY icirc  "&#238;"> <!-- latin small letter i with circumflex,
+                                  U+00EE ISOlat1 -->
+<!ENTITY iuml   "&#239;"> <!-- latin small letter i with diaeresis,
+                                  U+00EF ISOlat1 -->
+<!ENTITY eth    "&#240;"> <!-- latin small letter eth, U+00F0 ISOlat1 -->
+<!ENTITY ntilde "&#241;"> <!-- latin small letter n with tilde,
+                                  U+00F1 ISOlat1 -->
+<!ENTITY ograve "&#242;"> <!-- latin small letter o with grave,
+                                  U+00F2 ISOlat1 -->
+<!ENTITY oacute "&#243;"> <!-- latin small letter o with acute,
+                                  U+00F3 ISOlat1 -->
+<!ENTITY ocirc  "&#244;"> <!-- latin small letter o with circumflex,
+                                  U+00F4 ISOlat1 -->
+<!ENTITY otilde "&#245;"> <!-- latin small letter o with tilde,
+                                  U+00F5 ISOlat1 -->
+<!ENTITY ouml   "&#246;"> <!-- latin small letter o with diaeresis,
+                                  U+00F6 ISOlat1 -->
+<!ENTITY divide "&#247;"> <!-- division sign, U+00F7 ISOnum -->
+<!ENTITY oslash "&#248;"> <!-- latin small letter o with stroke,
+                                  = latin small letter o slash,
+                                  U+00F8 ISOlat1 -->
+<!ENTITY ugrave "&#249;"> <!-- latin small letter u with grave,
+                                  U+00F9 ISOlat1 -->
+<!ENTITY uacute "&#250;"> <!-- latin small letter u with acute,
+                                  U+00FA ISOlat1 -->
+<!ENTITY ucirc  "&#251;"> <!-- latin small letter u with circumflex,
+                                  U+00FB ISOlat1 -->
+<!ENTITY uuml   "&#252;"> <!-- latin small letter u with diaeresis,
+                                  U+00FC ISOlat1 -->
+<!ENTITY yacute "&#253;"> <!-- latin small letter y with acute,
+                                  U+00FD ISOlat1 -->
+<!ENTITY thorn  "&#254;"> <!-- latin small letter thorn,
+                                  U+00FE ISOlat1 -->
+<!ENTITY yuml   "&#255;"> <!-- latin small letter y with diaeresis,
+                                  U+00FF ISOlat1 -->
diff --git a/Utilities/xml/xhtml-special.ent b/Utilities/xml/xhtml-special.ent
new file mode 100644
index 000000000..3a83fb656
--- /dev/null
+++ b/Utilities/xml/xhtml-special.ent
@@ -0,0 +1,80 @@
+<!-- Special characters for XHTML -->
+
+<!-- Character entity set. Typical invocation:
+     <!ENTITY % HTMLspecial PUBLIC
+        "-//W3C//ENTITIES Special for XHTML//EN"
+        "http://www.w3.org/TR/xhtml1/DTD/xhtml-special.ent">
+     %HTMLspecial;
+-->
+
+<!-- Portions (C) 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. values are decimal
+     conversions of the ISO 10646 values and refer to the document
+     character set. Names are Unicode names.
+-->
+
+<!-- C0 Controls and Basic Latin -->
+<!ENTITY quot    "&#34;"> <!--  quotation mark, U+0022 ISOnum -->
+<!ENTITY amp     "&#38;#38;"> <!--  ampersand, U+0026 ISOnum -->
+<!ENTITY lt      "&#38;#60;"> <!--  less-than sign, U+003C ISOnum -->
+<!ENTITY gt      "&#62;"> <!--  greater-than sign, U+003E ISOnum -->
+<!ENTITY apos	 "&#39;"> <!--  apostrophe = APL quote, U+0027 ISOnum -->
+
+<!-- Latin Extended-A -->
+<!ENTITY OElig   "&#338;"> <!--  latin capital ligature OE,
+                                    U+0152 ISOlat2 -->
+<!ENTITY oelig   "&#339;"> <!--  latin small ligature oe, U+0153 ISOlat2 -->
+<!-- ligature is a misnomer, this is a separate character in some languages -->
+<!ENTITY Scaron  "&#352;"> <!--  latin capital letter S with caron,
+                                    U+0160 ISOlat2 -->
+<!ENTITY scaron  "&#353;"> <!--  latin small letter s with caron,
+                                    U+0161 ISOlat2 -->
+<!ENTITY Yuml    "&#376;"> <!--  latin capital letter Y with diaeresis,
+                                    U+0178 ISOlat2 -->
+
+<!-- Spacing Modifier Letters -->
+<!ENTITY circ    "&#710;"> <!--  modifier letter circumflex accent,
+                                    U+02C6 ISOpub -->
+<!ENTITY tilde   "&#732;"> <!--  small tilde, U+02DC ISOdia -->
+
+<!-- General Punctuation -->
+<!ENTITY ensp    "&#8194;"> <!-- en space, U+2002 ISOpub -->
+<!ENTITY emsp    "&#8195;"> <!-- em space, U+2003 ISOpub -->
+<!ENTITY thinsp  "&#8201;"> <!-- thin space, U+2009 ISOpub -->
+<!ENTITY zwnj    "&#8204;"> <!-- zero width non-joiner,
+                                    U+200C NEW RFC 2070 -->
+<!ENTITY zwj     "&#8205;"> <!-- zero width joiner, U+200D NEW RFC 2070 -->
+<!ENTITY lrm     "&#8206;"> <!-- left-to-right mark, U+200E NEW RFC 2070 -->
+<!ENTITY rlm     "&#8207;"> <!-- right-to-left mark, U+200F NEW RFC 2070 -->
+<!ENTITY ndash   "&#8211;"> <!-- en dash, U+2013 ISOpub -->
+<!ENTITY mdash   "&#8212;"> <!-- em dash, U+2014 ISOpub -->
+<!ENTITY lsquo   "&#8216;"> <!-- left single quotation mark,
+                                    U+2018 ISOnum -->
+<!ENTITY rsquo   "&#8217;"> <!-- right single quotation mark,
+                                    U+2019 ISOnum -->
+<!ENTITY sbquo   "&#8218;"> <!-- single low-9 quotation mark, U+201A NEW -->
+<!ENTITY ldquo   "&#8220;"> <!-- left double quotation mark,
+                                    U+201C ISOnum -->
+<!ENTITY rdquo   "&#8221;"> <!-- right double quotation mark,
+                                    U+201D ISOnum -->
+<!ENTITY bdquo   "&#8222;"> <!-- double low-9 quotation mark, U+201E NEW -->
+<!ENTITY dagger  "&#8224;"> <!-- dagger, U+2020 ISOpub -->
+<!ENTITY Dagger  "&#8225;"> <!-- double dagger, U+2021 ISOpub -->
+<!ENTITY permil  "&#8240;"> <!-- per mille sign, U+2030 ISOtech -->
+<!ENTITY lsaquo  "&#8249;"> <!-- single left-pointing angle quotation mark,
+                                    U+2039 ISO proposed -->
+<!-- lsaquo is proposed but not yet ISO standardized -->
+<!ENTITY rsaquo  "&#8250;"> <!-- single right-pointing angle quotation mark,
+                                    U+203A ISO proposed -->
+<!-- rsaquo is proposed but not yet ISO standardized -->
+
+<!-- Currency Symbols -->
+<!ENTITY euro   "&#8364;"> <!--  euro sign, U+20AC NEW -->
diff --git a/Utilities/xml/xhtml-symbol.ent b/Utilities/xml/xhtml-symbol.ent
new file mode 100644
index 000000000..d0c77eebc
--- /dev/null
+++ b/Utilities/xml/xhtml-symbol.ent
@@ -0,0 +1,237 @@
+<!-- Mathematical, Greek and Symbolic characters for XHTML -->
+
+<!-- Character entity set. Typical invocation:
+     <!ENTITY % HTMLsymbol PUBLIC
+        "-//W3C//ENTITIES Symbols for XHTML//EN"
+        "http://www.w3.org/TR/xhtml1/DTD/xhtml-symbol.ent">
+     %HTMLsymbol;
+-->
+
+<!-- Portions (C) 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. values are decimal
+     conversions of the ISO 10646 values and refer to the document
+     character set. Names are Unicode names.
+-->
+
+<!-- Latin Extended-B -->
+<!ENTITY fnof     "&#402;"> <!-- latin small letter f with hook = function
+                                    = florin, U+0192 ISOtech -->
+
+<!-- Greek -->
+<!ENTITY Alpha    "&#913;"> <!-- greek capital letter alpha, U+0391 -->
+<!ENTITY Beta     "&#914;"> <!-- greek capital letter beta, U+0392 -->
+<!ENTITY Gamma    "&#915;"> <!-- greek capital letter gamma,
+                                    U+0393 ISOgrk3 -->
+<!ENTITY Delta    "&#916;"> <!-- greek capital letter delta,
+                                    U+0394 ISOgrk3 -->
+<!ENTITY Epsilon  "&#917;"> <!-- greek capital letter epsilon, U+0395 -->
+<!ENTITY Zeta     "&#918;"> <!-- greek capital letter zeta, U+0396 -->
+<!ENTITY Eta      "&#919;"> <!-- greek capital letter eta, U+0397 -->
+<!ENTITY Theta    "&#920;"> <!-- greek capital letter theta,
+                                    U+0398 ISOgrk3 -->
+<!ENTITY Iota     "&#921;"> <!-- greek capital letter iota, U+0399 -->
+<!ENTITY Kappa    "&#922;"> <!-- greek capital letter kappa, U+039A -->
+<!ENTITY Lambda   "&#923;"> <!-- greek capital letter lamda,
+                                    U+039B ISOgrk3 -->
+<!ENTITY Mu       "&#924;"> <!-- greek capital letter mu, U+039C -->
+<!ENTITY Nu       "&#925;"> <!-- greek capital letter nu, U+039D -->
+<!ENTITY Xi       "&#926;"> <!-- greek capital letter xi, U+039E ISOgrk3 -->
+<!ENTITY Omicron  "&#927;"> <!-- greek capital letter omicron, U+039F -->
+<!ENTITY Pi       "&#928;"> <!-- greek capital letter pi, U+03A0 ISOgrk3 -->
+<!ENTITY Rho      "&#929;"> <!-- greek capital letter rho, U+03A1 -->
+<!-- there is no Sigmaf, and no U+03A2 character either -->
+<!ENTITY Sigma    "&#931;"> <!-- greek capital letter sigma,
+                                    U+03A3 ISOgrk3 -->
+<!ENTITY Tau      "&#932;"> <!-- greek capital letter tau, U+03A4 -->
+<!ENTITY Upsilon  "&#933;"> <!-- greek capital letter upsilon,
+                                    U+03A5 ISOgrk3 -->
+<!ENTITY Phi      "&#934;"> <!-- greek capital letter phi,
+                                    U+03A6 ISOgrk3 -->
+<!ENTITY Chi      "&#935;"> <!-- greek capital letter chi, U+03A7 -->
+<!ENTITY Psi      "&#936;"> <!-- greek capital letter psi,
+                                    U+03A8 ISOgrk3 -->
+<!ENTITY Omega    "&#937;"> <!-- greek capital letter omega,
+                                    U+03A9 ISOgrk3 -->
+
+<!ENTITY alpha    "&#945;"> <!-- greek small letter alpha,
+                                    U+03B1 ISOgrk3 -->
+<!ENTITY beta     "&#946;"> <!-- greek small letter beta, U+03B2 ISOgrk3 -->
+<!ENTITY gamma    "&#947;"> <!-- greek small letter gamma,
+                                    U+03B3 ISOgrk3 -->
+<!ENTITY delta    "&#948;"> <!-- greek small letter delta,
+                                    U+03B4 ISOgrk3 -->
+<!ENTITY epsilon  "&#949;"> <!-- greek small letter epsilon,
+                                    U+03B5 ISOgrk3 -->
+<!ENTITY zeta     "&#950;"> <!-- greek small letter zeta, U+03B6 ISOgrk3 -->
+<!ENTITY eta      "&#951;"> <!-- greek small letter eta, U+03B7 ISOgrk3 -->
+<!ENTITY theta    "&#952;"> <!-- greek small letter theta,
+                                    U+03B8 ISOgrk3 -->
+<!ENTITY iota     "&#953;"> <!-- greek small letter iota, U+03B9 ISOgrk3 -->
+<!ENTITY kappa    "&#954;"> <!-- greek small letter kappa,
+                                    U+03BA ISOgrk3 -->
+<!ENTITY lambda   "&#955;"> <!-- greek small letter lamda,
+                                    U+03BB ISOgrk3 -->
+<!ENTITY mu       "&#956;"> <!-- greek small letter mu, U+03BC ISOgrk3 -->
+<!ENTITY nu       "&#957;"> <!-- greek small letter nu, U+03BD ISOgrk3 -->
+<!ENTITY xi       "&#958;"> <!-- greek small letter xi, U+03BE ISOgrk3 -->
+<!ENTITY omicron  "&#959;"> <!-- greek small letter omicron, U+03BF NEW -->
+<!ENTITY pi       "&#960;"> <!-- greek small letter pi, U+03C0 ISOgrk3 -->
+<!ENTITY rho      "&#961;"> <!-- greek small letter rho, U+03C1 ISOgrk3 -->
+<!ENTITY sigmaf   "&#962;"> <!-- greek small letter final sigma,
+                                    U+03C2 ISOgrk3 -->
+<!ENTITY sigma    "&#963;"> <!-- greek small letter sigma,
+                                    U+03C3 ISOgrk3 -->
+<!ENTITY tau      "&#964;"> <!-- greek small letter tau, U+03C4 ISOgrk3 -->
+<!ENTITY upsilon  "&#965;"> <!-- greek small letter upsilon,
+                                    U+03C5 ISOgrk3 -->
+<!ENTITY phi      "&#966;"> <!-- greek small letter phi, U+03C6 ISOgrk3 -->
+<!ENTITY chi      "&#967;"> <!-- greek small letter chi, U+03C7 ISOgrk3 -->
+<!ENTITY psi      "&#968;"> <!-- greek small letter psi, U+03C8 ISOgrk3 -->
+<!ENTITY omega    "&#969;"> <!-- greek small letter omega,
+                                    U+03C9 ISOgrk3 -->
+<!ENTITY thetasym "&#977;"> <!-- greek theta symbol,
+                                    U+03D1 NEW -->
+<!ENTITY upsih    "&#978;"> <!-- greek upsilon with hook symbol,
+                                    U+03D2 NEW -->
+<!ENTITY piv      "&#982;"> <!-- greek pi symbol, U+03D6 ISOgrk3 -->
+
+<!-- General Punctuation -->
+<!ENTITY bull     "&#8226;"> <!-- bullet = black small circle,
+                                     U+2022 ISOpub  -->
+<!-- bullet is NOT the same as bullet operator, U+2219 -->
+<!ENTITY hellip   "&#8230;"> <!-- horizontal ellipsis = three dot leader,
+                                     U+2026 ISOpub  -->
+<!ENTITY prime    "&#8242;"> <!-- prime = minutes = feet, U+2032 ISOtech -->
+<!ENTITY Prime    "&#8243;"> <!-- double prime = seconds = inches,
+                                     U+2033 ISOtech -->
+<!ENTITY oline    "&#8254;"> <!-- overline = spacing overscore,
+                                     U+203E NEW -->
+<!ENTITY frasl    "&#8260;"> <!-- fraction slash, U+2044 NEW -->
+
+<!-- Letterlike Symbols -->
+<!ENTITY weierp   "&#8472;"> <!-- script capital P = power set
+                                     = Weierstrass p, U+2118 ISOamso -->
+<!ENTITY image    "&#8465;"> <!-- black-letter capital I = imaginary part,
+                                     U+2111 ISOamso -->
+<!ENTITY real     "&#8476;"> <!-- black-letter capital R = real part symbol,
+                                     U+211C ISOamso -->
+<!ENTITY trade    "&#8482;"> <!-- trade mark sign, U+2122 ISOnum -->
+<!ENTITY alefsym  "&#8501;"> <!-- 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     "&#8592;"> <!-- leftwards arrow, U+2190 ISOnum -->
+<!ENTITY uarr     "&#8593;"> <!-- upwards arrow, U+2191 ISOnum-->
+<!ENTITY rarr     "&#8594;"> <!-- rightwards arrow, U+2192 ISOnum -->
+<!ENTITY darr     "&#8595;"> <!-- downwards arrow, U+2193 ISOnum -->
+<!ENTITY harr     "&#8596;"> <!-- left right arrow, U+2194 ISOamsa -->
+<!ENTITY crarr    "&#8629;"> <!-- downwards arrow with corner leftwards
+                                     = carriage return, U+21B5 NEW -->
+<!ENTITY lArr     "&#8656;"> <!-- 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     "&#8657;"> <!-- upwards double arrow, U+21D1 ISOamsa -->
+<!ENTITY rArr     "&#8658;"> <!-- 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     "&#8659;"> <!-- downwards double arrow, U+21D3 ISOamsa -->
+<!ENTITY hArr     "&#8660;"> <!-- left right double arrow,
+                                     U+21D4 ISOamsa -->
+
+<!-- Mathematical Operators -->
+<!ENTITY forall   "&#8704;"> <!-- for all, U+2200 ISOtech -->
+<!ENTITY part     "&#8706;"> <!-- partial differential, U+2202 ISOtech  -->
+<!ENTITY exist    "&#8707;"> <!-- there exists, U+2203 ISOtech -->
+<!ENTITY empty    "&#8709;"> <!-- empty set = null set, U+2205 ISOamso -->
+<!ENTITY nabla    "&#8711;"> <!-- nabla = backward difference,
+                                     U+2207 ISOtech -->
+<!ENTITY isin     "&#8712;"> <!-- element of, U+2208 ISOtech -->
+<!ENTITY notin    "&#8713;"> <!-- not an element of, U+2209 ISOtech -->
+<!ENTITY ni       "&#8715;"> <!-- contains as member, U+220B ISOtech -->
+<!ENTITY prod     "&#8719;"> <!-- 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      "&#8721;"> <!-- n-ary summation, 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    "&#8722;"> <!-- minus sign, U+2212 ISOtech -->
+<!ENTITY lowast   "&#8727;"> <!-- asterisk operator, U+2217 ISOtech -->
+<!ENTITY radic    "&#8730;"> <!-- square root = radical sign,
+                                     U+221A ISOtech -->
+<!ENTITY prop     "&#8733;"> <!-- proportional to, U+221D ISOtech -->
+<!ENTITY infin    "&#8734;"> <!-- infinity, U+221E ISOtech -->
+<!ENTITY ang      "&#8736;"> <!-- angle, U+2220 ISOamso -->
+<!ENTITY and      "&#8743;"> <!-- logical and = wedge, U+2227 ISOtech -->
+<!ENTITY or       "&#8744;"> <!-- logical or = vee, U+2228 ISOtech -->
+<!ENTITY cap      "&#8745;"> <!-- intersection = cap, U+2229 ISOtech -->
+<!ENTITY cup      "&#8746;"> <!-- union = cup, U+222A ISOtech -->
+<!ENTITY int      "&#8747;"> <!-- integral, U+222B ISOtech -->
+<!ENTITY there4   "&#8756;"> <!-- therefore, U+2234 ISOtech -->
+<!ENTITY sim      "&#8764;"> <!-- 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     "&#8773;"> <!-- approximately equal to, U+2245 ISOtech -->
+<!ENTITY asymp    "&#8776;"> <!-- almost equal to = asymptotic to,
+                                     U+2248 ISOamsr -->
+<!ENTITY ne       "&#8800;"> <!-- not equal to, U+2260 ISOtech -->
+<!ENTITY equiv    "&#8801;"> <!-- identical to, U+2261 ISOtech -->
+<!ENTITY le       "&#8804;"> <!-- less-than or equal to, U+2264 ISOtech -->
+<!ENTITY ge       "&#8805;"> <!-- greater-than or equal to,
+                                     U+2265 ISOtech -->
+<!ENTITY sub      "&#8834;"> <!-- subset of, U+2282 ISOtech -->
+<!ENTITY sup      "&#8835;"> <!-- superset of, U+2283 ISOtech -->
+<!ENTITY nsub     "&#8836;"> <!-- not a subset of, U+2284 ISOamsn -->
+<!ENTITY sube     "&#8838;"> <!-- subset of or equal to, U+2286 ISOtech -->
+<!ENTITY supe     "&#8839;"> <!-- superset of or equal to,
+                                     U+2287 ISOtech -->
+<!ENTITY oplus    "&#8853;"> <!-- circled plus = direct sum,
+                                     U+2295 ISOamsb -->
+<!ENTITY otimes   "&#8855;"> <!-- circled times = vector product,
+                                     U+2297 ISOamsb -->
+<!ENTITY perp     "&#8869;"> <!-- up tack = orthogonal to = perpendicular,
+                                     U+22A5 ISOtech -->
+<!ENTITY sdot     "&#8901;"> <!-- dot operator, U+22C5 ISOamsb -->
+<!-- dot operator is NOT the same character as U+00B7 middle dot -->
+
+<!-- Miscellaneous Technical -->
+<!ENTITY lceil    "&#8968;"> <!-- left ceiling = APL upstile,
+                                     U+2308 ISOamsc  -->
+<!ENTITY rceil    "&#8969;"> <!-- right ceiling, U+2309 ISOamsc  -->
+<!ENTITY lfloor   "&#8970;"> <!-- left floor = APL downstile,
+                                     U+230A ISOamsc  -->
+<!ENTITY rfloor   "&#8971;"> <!-- right floor, U+230B ISOamsc  -->
+<!ENTITY lang     "&#9001;"> <!-- left-pointing angle bracket = bra,
+                                     U+2329 ISOtech -->
+<!-- lang is NOT the same character as U+003C 'less than sign'
+     or U+2039 'single left-pointing angle quotation mark' -->
+<!ENTITY rang     "&#9002;"> <!-- right-pointing angle bracket = ket,
+                                     U+232A ISOtech -->
+<!-- rang is NOT the same character as U+003E 'greater than sign'
+     or U+203A 'single right-pointing angle quotation mark' -->
+
+<!-- Geometric Shapes -->
+<!ENTITY loz      "&#9674;"> <!-- lozenge, U+25CA ISOpub -->
+
+<!-- Miscellaneous Symbols -->
+<!ENTITY spades   "&#9824;"> <!-- black spade suit, U+2660 ISOpub -->
+<!-- black here seems to mean filled as opposed to hollow -->
+<!ENTITY clubs    "&#9827;"> <!-- black club suit = shamrock,
+                                     U+2663 ISOpub -->
+<!ENTITY hearts   "&#9829;"> <!-- black heart suit = valentine,
+                                     U+2665 ISOpub -->
+<!ENTITY diams    "&#9830;"> <!-- black diamond suit, U+2666 ISOpub -->
diff --git a/Utilities/xml/xhtml1-strict.dtd b/Utilities/xml/xhtml1-strict.dtd
new file mode 100644
index 000000000..e48fbea6e
--- /dev/null
+++ b/Utilities/xml/xhtml1-strict.dtd
@@ -0,0 +1,977 @@
+<!--
+   Extensible HTML version 1.0 Strict DTD
+
+   This is the same as HTML 4 Strict except for
+   changes due to the differences between XML and SGML.
+
+   Namespace = http://www.w3.org/1999/xhtml
+
+   For further information, see: http://www.w3.org/TR/xhtml1
+
+   Copyright (c) 1998-2002 W3C (MIT, INRIA, Keio),
+   All Rights Reserved.
+
+   This DTD module is identified by the PUBLIC and SYSTEM identifiers:
+
+   PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+   SYSTEM "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
+
+   $Revision: 1.1 $
+   $Date: 2002/08/01 13:56:03 $
+
+-->
+
+<!--================ Character mnemonic entities =========================-->
+
+<!ENTITY % HTMLlat1 PUBLIC
+   "-//W3C//ENTITIES Latin 1 for XHTML//EN"
+   "xhtml-lat1.ent">
+%HTMLlat1;
+
+<!ENTITY % HTMLsymbol PUBLIC
+   "-//W3C//ENTITIES Symbols for XHTML//EN"
+   "xhtml-symbol.ent">
+%HTMLsymbol;
+
+<!ENTITY % HTMLspecial PUBLIC
+   "-//W3C//ENTITIES Special for XHTML//EN"
+   "xhtml-special.ent">
+%HTMLspecial;
+
+<!--================== Imported Names ====================================-->
+
+<!ENTITY % ContentType "CDATA">
+    <!-- media type, as per [RFC2045] -->
+
+<!ENTITY % ContentTypes "CDATA">
+    <!-- comma-separated list of media types, as per [RFC2045] -->
+
+<!ENTITY % Charset "CDATA">
+    <!-- a character encoding, as per [RFC2045] -->
+
+<!ENTITY % Charsets "CDATA">
+    <!-- a space separated list of character encodings, as per [RFC2045] -->
+
+<!ENTITY % LanguageCode "NMTOKEN">
+    <!-- a language code, as per [RFC3066] -->
+
+<!ENTITY % Character "CDATA">
+    <!-- a single character, as per section 2.2 of [XML] -->
+
+<!ENTITY % Number "CDATA">
+    <!-- one or more digits -->
+
+<!ENTITY % LinkTypes "CDATA">
+    <!-- space-separated list of link types -->
+
+<!ENTITY % MediaDesc "CDATA">
+    <!-- single or comma-separated list of media descriptors -->
+
+<!ENTITY % URI "CDATA">
+    <!-- a Uniform Resource Identifier, see [RFC2396] -->
+
+<!ENTITY % UriList "CDATA">
+    <!-- a space separated list of Uniform Resource Identifiers -->
+
+<!ENTITY % Datetime "CDATA">
+    <!-- date and time information. ISO date format -->
+
+<!ENTITY % Script "CDATA">
+    <!-- script expression -->
+
+<!ENTITY % StyleSheet "CDATA">
+    <!-- style sheet data -->
+
+<!ENTITY % Text "CDATA">
+    <!-- used for titles etc. -->
+
+<!ENTITY % Length "CDATA">
+    <!-- nn for pixels or nn% for percentage length -->
+
+<!ENTITY % MultiLength "CDATA">
+    <!-- pixel, percentage, or relative -->
+
+<!ENTITY % Pixels "CDATA">
+    <!-- integer representing length in pixels -->
+
+<!-- these are used for image maps -->
+
+<!ENTITY % Shape "(rect|circle|poly|default)">
+
+<!ENTITY % Coords "CDATA">
+    <!-- comma separated list of lengths -->
+
+<!--=================== Generic Attributes ===============================-->
+
+<!-- core attributes common to most elements
+  id       document-wide unique id
+  class    space separated list of classes
+  style    associated style info
+  title    advisory title/amplification
+-->
+<!ENTITY % coreattrs
+ "id          ID             #IMPLIED
+  class       CDATA          #IMPLIED
+  style       %StyleSheet;   #IMPLIED
+  title       %Text;         #IMPLIED"
+  >
+
+<!-- internationalization attributes
+  lang        language code (backwards compatible)
+  xml:lang    language code (as per XML 1.0 spec)
+  dir         direction for weak/neutral text
+-->
+<!ENTITY % i18n
+ "lang        %LanguageCode; #IMPLIED
+  xml:lang    %LanguageCode; #IMPLIED
+  dir         (ltr|rtl)      #IMPLIED"
+  >
+
+<!-- attributes for common UI events
+  onclick     a pointer button was clicked
+  ondblclick  a pointer button was double clicked
+  onmousedown a pointer button was pressed down
+  onmouseup   a pointer button was released
+  onmousemove a pointer was moved onto the element
+  onmouseout  a pointer was moved away from the element
+  onkeypress  a key was pressed and released
+  onkeydown   a key was pressed down
+  onkeyup     a key was released
+-->
+<!ENTITY % events
+ "onclick     %Script;       #IMPLIED
+  ondblclick  %Script;       #IMPLIED
+  onmousedown %Script;       #IMPLIED
+  onmouseup   %Script;       #IMPLIED
+  onmouseover %Script;       #IMPLIED
+  onmousemove %Script;       #IMPLIED
+  onmouseout  %Script;       #IMPLIED
+  onkeypress  %Script;       #IMPLIED
+  onkeydown   %Script;       #IMPLIED
+  onkeyup     %Script;       #IMPLIED"
+  >
+
+<!-- attributes for elements that can get the focus
+  accesskey   accessibility key character
+  tabindex    position in tabbing order
+  onfocus     the element got the focus
+  onblur      the element lost the focus
+-->
+<!ENTITY % focus
+ "accesskey   %Character;    #IMPLIED
+  tabindex    %Number;       #IMPLIED
+  onfocus     %Script;       #IMPLIED
+  onblur      %Script;       #IMPLIED"
+  >
+
+<!ENTITY % attrs "%coreattrs; %i18n; %events;">
+
+<!--=================== Text Elements ====================================-->
+
+<!ENTITY % special.pre
+   "br | span | bdo | map">
+
+
+<!ENTITY % special
+   "%special.pre; | object | img ">
+
+<!ENTITY % fontstyle "tt | i | b | big | small ">
+
+<!ENTITY % phrase "em | strong | dfn | code | q |
+                   samp | kbd | var | cite | abbr | acronym | sub | sup ">
+
+<!ENTITY % inline.forms "input | select | textarea | label | button">
+
+<!-- these can occur at block or inline level -->
+<!ENTITY % misc.inline "ins | del | script">
+
+<!-- these can only occur at block level -->
+<!ENTITY % misc "noscript | %misc.inline;">
+
+<!ENTITY % inline "a | %special; | %fontstyle; | %phrase; | %inline.forms;">
+
+<!-- %Inline; covers inline or "text-level" elements -->
+<!ENTITY % Inline "(#PCDATA | %inline; | %misc.inline;)*">
+
+<!--================== Block level elements ==============================-->
+
+<!ENTITY % heading "h1|h2|h3|h4|h5|h6">
+<!ENTITY % lists "ul | ol | dl">
+<!ENTITY % blocktext "pre | hr | blockquote | address">
+
+<!ENTITY % block
+     "p | %heading; | div | %lists; | %blocktext; | fieldset | table">
+
+<!ENTITY % Block "(%block; | form | %misc;)*">
+
+<!-- %Flow; mixes block and inline and is used for list items etc. -->
+<!ENTITY % Flow "(#PCDATA | %block; | form | %inline; | %misc;)*">
+
+<!--================== Content models for exclusions =====================-->
+
+<!-- a elements use %Inline; excluding a -->
+
+<!ENTITY % a.content
+   "(#PCDATA | %special; | %fontstyle; | %phrase; | %inline.forms; | %misc.inline;)*">
+
+<!-- pre uses %Inline excluding big, small, sup or sup -->
+
+<!ENTITY % pre.content
+   "(#PCDATA | a | %fontstyle; | %phrase; | %special.pre; | %misc.inline;
+      | %inline.forms;)*">
+
+<!-- form uses %Block; excluding form -->
+
+<!ENTITY % form.content "(%block; | %misc;)*">
+
+<!-- button uses %Flow; but excludes a, form and form controls -->
+
+<!ENTITY % button.content
+   "(#PCDATA | p | %heading; | div | %lists; | %blocktext; |
+    table | %special; | %fontstyle; | %phrase; | %misc;)*">
+
+<!--================ Document Structure ==================================-->
+
+<!-- the namespace URI designates the document profile -->
+
+<!ELEMENT html (head, body)>
+<!ATTLIST html
+  %i18n;
+  id          ID             #IMPLIED
+  xmlns       %URI;          #FIXED 'http://www.w3.org/1999/xhtml'
+  >
+
+<!--================ Document Head =======================================-->
+
+<!ENTITY % head.misc "(script|style|meta|link|object)*">
+
+<!-- content model is %head.misc; combined with a single
+     title and an optional base element in any order -->
+
+<!ELEMENT head (%head.misc;,
+     ((title, %head.misc;, (base, %head.misc;)?) |
+      (base, %head.misc;, (title, %head.misc;))))>
+
+<!ATTLIST head
+  %i18n;
+  id          ID             #IMPLIED
+  profile     %URI;          #IMPLIED
+  >
+
+<!-- The title element is not considered part of the flow of text.
+       It should be displayed, for example as the page header or
+       window title. Exactly one title is required per document.
+    -->
+<!ELEMENT title (#PCDATA)>
+<!ATTLIST title
+  %i18n;
+  id          ID             #IMPLIED
+  >
+
+<!-- document base URI -->
+
+<!ELEMENT base EMPTY>
+<!ATTLIST base
+  href        %URI;          #REQUIRED
+  id          ID             #IMPLIED
+  >
+
+<!-- generic metainformation -->
+<!ELEMENT meta EMPTY>
+<!ATTLIST meta
+  %i18n;
+  id          ID             #IMPLIED
+  http-equiv  CDATA          #IMPLIED
+  name        CDATA          #IMPLIED
+  content     CDATA          #REQUIRED
+  scheme      CDATA          #IMPLIED
+  >
+
+<!--
+  Relationship values can be used in principle:
+
+   a) for document specific toolbars/menus when used
+      with the link element in document head e.g.
+        start, contents, previous, next, index, end, help
+   b) to link to a separate style sheet (rel="stylesheet")
+   c) to make a link to a script (rel="script")
+   d) by stylesheets to control how collections of
+      html nodes are rendered into printed documents
+   e) to make a link to a printable version of this document
+      e.g. a PostScript or PDF version (rel="alternate" media="print")
+-->
+
+<!ELEMENT link EMPTY>
+<!ATTLIST link
+  %attrs;
+  charset     %Charset;      #IMPLIED
+  href        %URI;          #IMPLIED
+  hreflang    %LanguageCode; #IMPLIED
+  type        %ContentType;  #IMPLIED
+  rel         %LinkTypes;    #IMPLIED
+  rev         %LinkTypes;    #IMPLIED
+  media       %MediaDesc;    #IMPLIED
+  >
+
+<!-- style info, which may include CDATA sections -->
+<!ELEMENT style (#PCDATA)>
+<!ATTLIST style
+  %i18n;
+  id          ID             #IMPLIED
+  type        %ContentType;  #REQUIRED
+  media       %MediaDesc;    #IMPLIED
+  title       %Text;         #IMPLIED
+  xml:space   (preserve)     #FIXED 'preserve'
+  >
+
+<!-- script statements, which may include CDATA sections -->
+<!ELEMENT script (#PCDATA)>
+<!ATTLIST script
+  id          ID             #IMPLIED
+  charset     %Charset;      #IMPLIED
+  type        %ContentType;  #REQUIRED
+  src         %URI;          #IMPLIED
+  defer       (defer)        #IMPLIED
+  xml:space   (preserve)     #FIXED 'preserve'
+  >
+
+<!-- alternate content container for non script-based rendering -->
+
+<!ELEMENT noscript %Block;>
+<!ATTLIST noscript
+  %attrs;
+  >
+
+<!--=================== Document Body ====================================-->
+
+<!ELEMENT body %Block;>
+<!ATTLIST body
+  %attrs;
+  onload          %Script;   #IMPLIED
+  onunload        %Script;   #IMPLIED
+  >
+
+<!ELEMENT div %Flow;>  <!-- generic language/style container -->
+<!ATTLIST div
+  %attrs;
+  >
+
+<!--=================== Paragraphs =======================================-->
+
+<!ELEMENT p %Inline;>
+<!ATTLIST p
+  %attrs;
+  >
+
+<!--=================== Headings =========================================-->
+
+<!--
+  There are six levels of headings from h1 (the most important)
+  to h6 (the least important).
+-->
+
+<!ELEMENT h1  %Inline;>
+<!ATTLIST h1
+   %attrs;
+   >
+
+<!ELEMENT h2 %Inline;>
+<!ATTLIST h2
+   %attrs;
+   >
+
+<!ELEMENT h3 %Inline;>
+<!ATTLIST h3
+   %attrs;
+   >
+
+<!ELEMENT h4 %Inline;>
+<!ATTLIST h4
+   %attrs;
+   >
+
+<!ELEMENT h5 %Inline;>
+<!ATTLIST h5
+   %attrs;
+   >
+
+<!ELEMENT h6 %Inline;>
+<!ATTLIST h6
+   %attrs;
+   >
+
+<!--=================== Lists ============================================-->
+
+<!-- Unordered list -->
+
+<!ELEMENT ul (li)+>
+<!ATTLIST ul
+  %attrs;
+  >
+
+<!-- Ordered (numbered) list -->
+
+<!ELEMENT ol (li)+>
+<!ATTLIST ol
+  %attrs;
+  >
+
+<!-- list item -->
+
+<!ELEMENT li %Flow;>
+<!ATTLIST li
+  %attrs;
+  >
+
+<!-- definition lists - dt for term, dd for its definition -->
+
+<!ELEMENT dl (dt|dd)+>
+<!ATTLIST dl
+  %attrs;
+  >
+
+<!ELEMENT dt %Inline;>
+<!ATTLIST dt
+  %attrs;
+  >
+
+<!ELEMENT dd %Flow;>
+<!ATTLIST dd
+  %attrs;
+  >
+
+<!--=================== Address ==========================================-->
+
+<!-- information on author -->
+
+<!ELEMENT address %Inline;>
+<!ATTLIST address
+  %attrs;
+  >
+
+<!--=================== Horizontal Rule ==================================-->
+
+<!ELEMENT hr EMPTY>
+<!ATTLIST hr
+  %attrs;
+  >
+
+<!--=================== Preformatted Text ================================-->
+
+<!-- content is %Inline; excluding "img|object|big|small|sub|sup" -->
+
+<!ELEMENT pre %pre.content;>
+<!ATTLIST pre
+  %attrs;
+  xml:space (preserve) #FIXED 'preserve'
+  >
+
+<!--=================== Block-like Quotes ================================-->
+
+<!ELEMENT blockquote %Block;>
+<!ATTLIST blockquote
+  %attrs;
+  cite        %URI;          #IMPLIED
+  >
+
+<!--=================== Inserted/Deleted Text ============================-->
+
+<!--
+  ins/del are allowed in block and inline content, but its
+  inappropriate to include block content within an ins element
+  occurring in inline content.
+-->
+<!ELEMENT ins %Flow;>
+<!ATTLIST ins
+  %attrs;
+  cite        %URI;          #IMPLIED
+  datetime    %Datetime;     #IMPLIED
+  >
+
+<!ELEMENT del %Flow;>
+<!ATTLIST del
+  %attrs;
+  cite        %URI;          #IMPLIED
+  datetime    %Datetime;     #IMPLIED
+  >
+
+<!--================== The Anchor Element ================================-->
+
+<!-- content is %Inline; except that anchors shouldn't be nested -->
+
+<!ELEMENT a %a.content;>
+<!ATTLIST a
+  %attrs;
+  %focus;
+  charset     %Charset;      #IMPLIED
+  type        %ContentType;  #IMPLIED
+  name        NMTOKEN        #IMPLIED
+  href        %URI;          #IMPLIED
+  hreflang    %LanguageCode; #IMPLIED
+  rel         %LinkTypes;    #IMPLIED
+  rev         %LinkTypes;    #IMPLIED
+  shape       %Shape;        "rect"
+  coords      %Coords;       #IMPLIED
+  >
+
+<!--===================== Inline Elements ================================-->
+
+<!ELEMENT span %Inline;> <!-- generic language/style container -->
+<!ATTLIST span
+  %attrs;
+  >
+
+<!ELEMENT bdo %Inline;>  <!-- I18N BiDi over-ride -->
+<!ATTLIST bdo
+  %coreattrs;
+  %events;
+  lang        %LanguageCode; #IMPLIED
+  xml:lang    %LanguageCode; #IMPLIED
+  dir         (ltr|rtl)      #REQUIRED
+  >
+
+<!ELEMENT br EMPTY>   <!-- forced line break -->
+<!ATTLIST br
+  %coreattrs;
+  >
+
+<!ELEMENT em %Inline;>   <!-- emphasis -->
+<!ATTLIST em %attrs;>
+
+<!ELEMENT strong %Inline;>   <!-- strong emphasis -->
+<!ATTLIST strong %attrs;>
+
+<!ELEMENT dfn %Inline;>   <!-- definitional -->
+<!ATTLIST dfn %attrs;>
+
+<!ELEMENT code %Inline;>   <!-- program code -->
+<!ATTLIST code %attrs;>
+
+<!ELEMENT samp %Inline;>   <!-- sample -->
+<!ATTLIST samp %attrs;>
+
+<!ELEMENT kbd %Inline;>  <!-- something user would type -->
+<!ATTLIST kbd %attrs;>
+
+<!ELEMENT var %Inline;>   <!-- variable -->
+<!ATTLIST var %attrs;>
+
+<!ELEMENT cite %Inline;>   <!-- citation -->
+<!ATTLIST cite %attrs;>
+
+<!ELEMENT abbr %Inline;>   <!-- abbreviation -->
+<!ATTLIST abbr %attrs;>
+
+<!ELEMENT acronym %Inline;>   <!-- acronym -->
+<!ATTLIST acronym %attrs;>
+
+<!ELEMENT q %Inline;>   <!-- inlined quote -->
+<!ATTLIST q
+  %attrs;
+  cite        %URI;          #IMPLIED
+  >
+
+<!ELEMENT sub %Inline;> <!-- subscript -->
+<!ATTLIST sub %attrs;>
+
+<!ELEMENT sup %Inline;> <!-- superscript -->
+<!ATTLIST sup %attrs;>
+
+<!ELEMENT tt %Inline;>   <!-- fixed pitch font -->
+<!ATTLIST tt %attrs;>
+
+<!ELEMENT i %Inline;>   <!-- italic font -->
+<!ATTLIST i %attrs;>
+
+<!ELEMENT b %Inline;>   <!-- bold font -->
+<!ATTLIST b %attrs;>
+
+<!ELEMENT big %Inline;>   <!-- bigger font -->
+<!ATTLIST big %attrs;>
+
+<!ELEMENT small %Inline;>   <!-- smaller font -->
+<!ATTLIST small %attrs;>
+
+<!--==================== Object ======================================-->
+<!--
+  object is used to embed objects as part of HTML pages.
+  param elements should precede other content. Parameters
+  can also be expressed as attribute/value pairs on the
+  object element itself when brevity is desired.
+-->
+
+<!ELEMENT object (#PCDATA | param | %block; | form | %inline; | %misc;)*>
+<!ATTLIST object
+  %attrs;
+  declare     (declare)      #IMPLIED
+  classid     %URI;          #IMPLIED
+  codebase    %URI;          #IMPLIED
+  data        %URI;          #IMPLIED
+  type        %ContentType;  #IMPLIED
+  codetype    %ContentType;  #IMPLIED
+  archive     %UriList;      #IMPLIED
+  standby     %Text;         #IMPLIED
+  height      %Length;       #IMPLIED
+  width       %Length;       #IMPLIED
+  usemap      %URI;          #IMPLIED
+  name        NMTOKEN        #IMPLIED
+  tabindex    %Number;       #IMPLIED
+  >
+
+<!--
+  param is used to supply a named property value.
+  In XML it would seem natural to follow RDF and support an
+  abbreviated syntax where the param elements are replaced
+  by attribute value pairs on the object start tag.
+-->
+<!ELEMENT param EMPTY>
+<!ATTLIST param
+  id          ID             #IMPLIED
+  name        CDATA          #IMPLIED
+  value       CDATA          #IMPLIED
+  valuetype   (data|ref|object) "data"
+  type        %ContentType;  #IMPLIED
+  >
+
+<!--=================== Images ===========================================-->
+
+<!--
+   To avoid accessibility problems for people who aren't
+   able to see the image, you should provide a text
+   description using the alt and longdesc attributes.
+   In addition, avoid the use of server-side image maps.
+   Note that in this DTD there is no name attribute. That
+   is only available in the transitional and frameset DTD.
+-->
+
+<!ELEMENT img EMPTY>
+<!ATTLIST img
+  %attrs;
+  src         %URI;          #REQUIRED
+  alt         %Text;         #REQUIRED
+  longdesc    %URI;          #IMPLIED
+  height      %Length;       #IMPLIED
+  width       %Length;       #IMPLIED
+  usemap      %URI;          #IMPLIED
+  ismap       (ismap)        #IMPLIED
+  >
+
+<!-- usemap points to a map element which may be in this document
+  or an external document, although the latter is not widely supported -->
+
+<!--================== Client-side image maps ============================-->
+
+<!-- These can be placed in the same document or grouped in a
+     separate document although this isn't yet widely supported -->
+
+<!ELEMENT map ((%block; | form | %misc;)+ | area+)>
+<!ATTLIST map
+  %i18n;
+  %events;
+  id          ID             #REQUIRED
+  class       CDATA          #IMPLIED
+  style       %StyleSheet;   #IMPLIED
+  title       %Text;         #IMPLIED
+  name        NMTOKEN        #IMPLIED
+  >
+
+<!ELEMENT area EMPTY>
+<!ATTLIST area
+  %attrs;
+  %focus;
+  shape       %Shape;        "rect"
+  coords      %Coords;       #IMPLIED
+  href        %URI;          #IMPLIED
+  nohref      (nohref)       #IMPLIED
+  alt         %Text;         #REQUIRED
+  >
+
+<!--================ Forms ===============================================-->
+<!ELEMENT form %form.content;>   <!-- forms shouldn't be nested -->
+
+<!ATTLIST form
+  %attrs;
+  action      %URI;          #REQUIRED
+  method      (get|post)     "get"
+  enctype     %ContentType;  "application/x-www-form-urlencoded"
+  onsubmit    %Script;       #IMPLIED
+  onreset     %Script;       #IMPLIED
+  accept      %ContentTypes; #IMPLIED
+  accept-charset %Charsets;  #IMPLIED
+  >
+
+<!--
+  Each label must not contain more than ONE field
+  Label elements shouldn't be nested.
+-->
+<!ELEMENT label %Inline;>
+<!ATTLIST label
+  %attrs;
+  for         IDREF          #IMPLIED
+  accesskey   %Character;    #IMPLIED
+  onfocus     %Script;       #IMPLIED
+  onblur      %Script;       #IMPLIED
+  >
+
+<!ENTITY % InputType
+  "(text | password | checkbox |
+    radio | submit | reset |
+    file | hidden | image | button)"
+   >
+
+<!-- the name attribute is required for all but submit & reset -->
+
+<!ELEMENT input EMPTY>     <!-- form control -->
+<!ATTLIST input
+  %attrs;
+  %focus;
+  type        %InputType;    "text"
+  name        CDATA          #IMPLIED
+  value       CDATA          #IMPLIED
+  checked     (checked)      #IMPLIED
+  disabled    (disabled)     #IMPLIED
+  readonly    (readonly)     #IMPLIED
+  size        CDATA          #IMPLIED
+  maxlength   %Number;       #IMPLIED
+  src         %URI;          #IMPLIED
+  alt         CDATA          #IMPLIED
+  usemap      %URI;          #IMPLIED
+  onselect    %Script;       #IMPLIED
+  onchange    %Script;       #IMPLIED
+  accept      %ContentTypes; #IMPLIED
+  >
+
+<!ELEMENT select (optgroup|option)+>  <!-- option selector -->
+<!ATTLIST select
+  %attrs;
+  name        CDATA          #IMPLIED
+  size        %Number;       #IMPLIED
+  multiple    (multiple)     #IMPLIED
+  disabled    (disabled)     #IMPLIED
+  tabindex    %Number;       #IMPLIED
+  onfocus     %Script;       #IMPLIED
+  onblur      %Script;       #IMPLIED
+  onchange    %Script;       #IMPLIED
+  >
+
+<!ELEMENT optgroup (option)+>   <!-- option group -->
+<!ATTLIST optgroup
+  %attrs;
+  disabled    (disabled)     #IMPLIED
+  label       %Text;         #REQUIRED
+  >
+
+<!ELEMENT option (#PCDATA)>     <!-- selectable choice -->
+<!ATTLIST option
+  %attrs;
+  selected    (selected)     #IMPLIED
+  disabled    (disabled)     #IMPLIED
+  label       %Text;         #IMPLIED
+  value       CDATA          #IMPLIED
+  >
+
+<!ELEMENT textarea (#PCDATA)>     <!-- multi-line text field -->
+<!ATTLIST textarea
+  %attrs;
+  %focus;
+  name        CDATA          #IMPLIED
+  rows        %Number;       #REQUIRED
+  cols        %Number;       #REQUIRED
+  disabled    (disabled)     #IMPLIED
+  readonly    (readonly)     #IMPLIED
+  onselect    %Script;       #IMPLIED
+  onchange    %Script;       #IMPLIED
+  >
+
+<!--
+  The fieldset element is used to group form fields.
+  Only one legend element should occur in the content
+  and if present should only be preceded by whitespace.
+-->
+<!ELEMENT fieldset (#PCDATA | legend | %block; | form | %inline; | %misc;)*>
+<!ATTLIST fieldset
+  %attrs;
+  >
+
+<!ELEMENT legend %Inline;>     <!-- fieldset label -->
+<!ATTLIST legend
+  %attrs;
+  accesskey   %Character;    #IMPLIED
+  >
+
+<!--
+ Content is %Flow; excluding a, form and form controls
+-->
+<!ELEMENT button %button.content;>  <!-- push button -->
+<!ATTLIST button
+  %attrs;
+  %focus;
+  name        CDATA          #IMPLIED
+  value       CDATA          #IMPLIED
+  type        (button|submit|reset) "submit"
+  disabled    (disabled)     #IMPLIED
+  >
+
+<!--======================= Tables =======================================-->
+
+<!-- Derived from IETF HTML table standard, see [RFC1942] -->
+
+<!--
+ The border attribute sets the thickness of the frame around the
+ table. The default units are screen pixels.
+
+ The frame attribute specifies which parts of the frame around
+ the table should be rendered. The values are not the same as
+ CALS to avoid a name clash with the valign attribute.
+-->
+<!ENTITY % TFrame "(void|above|below|hsides|lhs|rhs|vsides|box|border)">
+
+<!--
+ The rules attribute defines which rules to draw between cells:
+
+ If rules is absent then assume:
+     "none" if border is absent or border="0" otherwise "all"
+-->
+
+<!ENTITY % TRules "(none | groups | rows | cols | all)">
+
+<!-- horizontal alignment attributes for cell contents
+
+  char        alignment char, e.g. char=':'
+  charoff     offset for alignment char
+-->
+<!ENTITY % cellhalign
+  "align      (left|center|right|justify|char) #IMPLIED
+   char       %Character;    #IMPLIED
+   charoff    %Length;       #IMPLIED"
+  >
+
+<!-- vertical alignment attributes for cell contents -->
+<!ENTITY % cellvalign
+  "valign     (top|middle|bottom|baseline) #IMPLIED"
+  >
+
+<!ELEMENT table
+     (caption?, (col*|colgroup*), thead?, tfoot?, (tbody+|tr+))>
+<!ELEMENT caption  %Inline;>
+<!ELEMENT thead    (tr)+>
+<!ELEMENT tfoot    (tr)+>
+<!ELEMENT tbody    (tr)+>
+<!ELEMENT colgroup (col)*>
+<!ELEMENT col      EMPTY>
+<!ELEMENT tr       (th|td)+>
+<!ELEMENT th       %Flow;>
+<!ELEMENT td       %Flow;>
+
+<!ATTLIST table
+  %attrs;
+  summary     %Text;         #IMPLIED
+  width       %Length;       #IMPLIED
+  border      %Pixels;       #IMPLIED
+  frame       %TFrame;       #IMPLIED
+  rules       %TRules;       #IMPLIED
+  cellspacing %Length;       #IMPLIED
+  cellpadding %Length;       #IMPLIED
+  >
+
+<!ATTLIST caption
+  %attrs;
+  >
+
+<!--
+colgroup groups a set of col elements. It allows you to group
+several semantically related columns together.
+-->
+<!ATTLIST colgroup
+  %attrs;
+  span        %Number;       "1"
+  width       %MultiLength;  #IMPLIED
+  %cellhalign;
+  %cellvalign;
+  >
+
+<!--
+ col elements define the alignment properties for cells in
+ one or more columns.
+
+ The width attribute specifies the width of the columns, e.g.
+
+     width=64        width in screen pixels
+     width=0.5*      relative width of 0.5
+
+ The span attribute causes the attributes of one
+ col element to apply to more than one column.
+-->
+<!ATTLIST col
+  %attrs;
+  span        %Number;       "1"
+  width       %MultiLength;  #IMPLIED
+  %cellhalign;
+  %cellvalign;
+  >
+
+<!--
+    Use thead to duplicate headers when breaking table
+    across page boundaries, or for static headers when
+    tbody sections are rendered in scrolling panel.
+
+    Use tfoot to duplicate footers when breaking table
+    across page boundaries, or for static footers when
+    tbody sections are rendered in scrolling panel.
+
+    Use multiple tbody sections when rules are needed
+    between groups of table rows.
+-->
+<!ATTLIST thead
+  %attrs;
+  %cellhalign;
+  %cellvalign;
+  >
+
+<!ATTLIST tfoot
+  %attrs;
+  %cellhalign;
+  %cellvalign;
+  >
+
+<!ATTLIST tbody
+  %attrs;
+  %cellhalign;
+  %cellvalign;
+  >
+
+<!ATTLIST tr
+  %attrs;
+  %cellhalign;
+  %cellvalign;
+  >
+
+
+<!-- Scope is simpler than headers attribute for common tables -->
+<!ENTITY % Scope "(row|col|rowgroup|colgroup)">
+
+<!-- th is for headers, td for data and for cells acting as both -->
+
+<!ATTLIST th
+  %attrs;
+  abbr        %Text;         #IMPLIED
+  axis        CDATA          #IMPLIED
+  headers     IDREFS         #IMPLIED
+  scope       %Scope;        #IMPLIED
+  rowspan     %Number;       "1"
+  colspan     %Number;       "1"
+  %cellhalign;
+  %cellvalign;
+  >
+
+<!ATTLIST td
+  %attrs;
+  abbr        %Text;         #IMPLIED
+  axis        CDATA          #IMPLIED
+  headers     IDREFS         #IMPLIED
+  scope       %Scope;        #IMPLIED
+  rowspan     %Number;       "1"
+  colspan     %Number;       "1"
+  %cellhalign;
+  %cellvalign;
+  >