Code: 
Box:~/xhtml/xhtml1-20020801/DTD$ diff xhtml1-strict.dtd xhtml1-transitional.dtd
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<    Extensible HTML version 1.0 Strict DTD
---
>    Extensible HTML version 1.0 Transitional DTD
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<    This is the same as HTML 4 Strict except for
---
>    This is the same as HTML 4 Transitional except for
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<    PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
<    SYSTEM "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
---
>    PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
>    SYSTEM "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
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<    $Revision: 1.24 $
<    $Date: 2002/07/31 19:34:51 $
---
>    $Revision: 1.27 $
>    $Date: 2002/08/01 18:16:48 $
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> <!ENTITY % FrameTarget "NMTOKEN">
>     <!-- render in this frame -->
>
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> <!-- used for object, applet, img, input and iframe -->
> <!ENTITY % ImgAlign "(top|middle|bottom|left|right)">
>
> <!-- a color using sRGB: #RRGGBB as Hex values -->
> <!ENTITY % Color "CDATA">
>
> <!-- There are also 16 widely known color names with their sRGB values:
>
>     Black  = #000000    Green  = #008000
>     Silver = #C0C0C0    Lime   = #00FF00
>     Gray   = #808080    Olive  = #808000
>     White  = #FFFFFF    Yellow = #FFFF00
>     Maroon = #800000    Navy   = #000080
>     Red    = #FF0000    Blue   = #0000FF
>     Purple = #800080    Teal   = #008080
>     Fuchsia= #FF00FF    Aqua   = #00FFFF
> -->
>
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< <!--=================== Text Elements ====================================-->
---
> <!-- text alignment for p, div, h1-h6. The default is
>      align="left" for ltr headings, "right" for rtl -->
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< <!ENTITY % special.pre
<    "br | span | bdo | map">
---
> <!ENTITY % TextAlign "align (left|center|right|justify) #IMPLIED">
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> <!--=================== Text Elements ====================================-->
>
> <!ENTITY % special.extra
>    "object | applet | img | map | iframe">
>
> <!ENTITY % special.basic
>       "br | span | bdo">
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<    "%special.pre; | object | img ">
---
>    "%special.basic; | %special.extra;">
>
> <!ENTITY % fontstyle.extra "big | small | font | basefont">
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< <!ENTITY % fontstyle "tt | i | b | big | small ">
---
> <!ENTITY % fontstyle.basic "tt | i | b | u
>                       | s | strike ">
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< <!ENTITY % phrase "em | strong | dfn | code | q |
<                    samp | kbd | var | cite | abbr | acronym | sub | sup ">
---
> <!ENTITY % fontstyle "%fontstyle.basic; | %fontstyle.extra;">
>
> <!ENTITY % phrase.extra "sub | sup">
> <!ENTITY % phrase.basic "em | strong | dfn | code | q |
>                    samp | kbd | var | cite | abbr | acronym">
>
> <!ENTITY % phrase "%phrase.basic; | %phrase.extra;">
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< <!ENTITY % lists "ul | ol | dl">
< <!ENTITY % blocktext "pre | hr | blockquote | address">
---
> <!ENTITY % lists "ul | ol | dl | menu | dir">
> <!ENTITY % blocktext "pre | hr | blockquote | address | center | noframes">
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<      "p | %heading; | div | %lists; | %blocktext; | fieldset | table">
<
< <!ENTITY % Block "(%block; | form | %misc;)*">
---
>     "p | %heading; | div | %lists; | %blocktext; | isindex |fieldset | table">
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< <!-- pre uses %Inline excluding big, small, sup or sup -->
---
> <!-- pre uses %Inline excluding img, object, applet, big, small,
>      font, or basefont -->
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<    "(#PCDATA | a | %fontstyle; | %phrase; | %special.pre; | %misc.inline;
<       | %inline.forms;)*">
---
>    "(#PCDATA | a | %special.basic; | %fontstyle.basic; | %phrase.basic; |
>          %inline.forms; | %misc.inline;)*">
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< <!-- form uses %Block; excluding form -->
---
> <!-- form uses %Flow; excluding form -->
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< <!ENTITY % form.content "(%block; | %misc;)*">
---
> <!ENTITY % form.content "(#PCDATA | %block; | %inline; | %misc;)*">
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< <!-- button uses %Flow; but excludes a, form and form controls -->
---
> <!-- button uses %Flow; but excludes a, form, form controls, iframe -->
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<     table | %special; | %fontstyle; | %phrase; | %misc;)*">
---
>       table | br | span | bdo | object | applet | img | map |
>       %fontstyle; | %phrase; | %misc;)*">
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< <!ENTITY % head.misc "(script|style|meta|link|object)*">
---
> <!ENTITY % head.misc "(script|style|meta|link|object|isindex)*">
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<   href        %URI;          #REQUIRED
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>   href        %URI;          #IMPLIED
>   target      %FrameTarget;  #IMPLIED
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>   target      %FrameTarget;  #IMPLIED
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>   language    CDATA          #IMPLIED
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< <!ELEMENT noscript %Block;>
---
> <!ELEMENT noscript %Flow;>
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> <!--======================= Frames =======================================-->
>
> <!-- inline subwindow -->
>
> <!ELEMENT iframe %Flow;>
> <!ATTLIST iframe
>   %coreattrs;
>   longdesc    %URI;          #IMPLIED
>   name        NMTOKEN        #IMPLIED
>   src         %URI;          #IMPLIED
>   frameborder (1|0)          "1"
>   marginwidth %Pixels;       #IMPLIED
>   marginheight %Pixels;      #IMPLIED
>   scrolling   (yes|no|auto)  "auto"
>   align       %ImgAlign;     #IMPLIED
>   height      %Length;       #IMPLIED
>   width       %Length;       #IMPLIED
>   >
>
> <!-- alternate content container for non frame-based rendering -->
>
> <!ELEMENT noframes %Flow;>
> <!ATTLIST noframes
>   %attrs;
>   >
>
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< <!ELEMENT body %Block;>
---
> <!ELEMENT body %Flow;>
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<   onload          %Script;   #IMPLIED
<   onunload        %Script;   #IMPLIED
---
>   onload      %Script;       #IMPLIED
>   onunload    %Script;       #IMPLIED
>   background  %URI;          #IMPLIED
>   bgcolor     %Color;        #IMPLIED
>   text        %Color;        #IMPLIED
>   link        %Color;        #IMPLIED
>   vlink       %Color;        #IMPLIED
>   alink       %Color;        #IMPLIED
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>   %TextAlign;
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>   %TextAlign;
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<    %attrs;
<    >
---
>   %attrs;
>   %TextAlign;
>   >
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<    %attrs;
<    >
---
>   %attrs;
>   %TextAlign;
>   >
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<    %attrs;
<    >
---
>   %attrs;
>   %TextAlign;
>   >
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<    %attrs;
<    >
---
>   %attrs;
>   %TextAlign;
>   >
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<    %attrs;
<    >
---
>   %attrs;
>   %TextAlign;
>   >
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<    %attrs;
<    >
---
>   %attrs;
>   %TextAlign;
>   >
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> <!-- Unordered list bullet styles -->
>
> <!ENTITY % ULStyle "(disc|square|circle)">
>
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>   type        %ULStyle;     #IMPLIED
>   compact     (compact)     #IMPLIED
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> <!-- Ordered list numbering style
>
>     1   arabic numbers      1, 2, 3, ...
>     a   lower alpha         a, b, c, ...
>     A   upper alpha         A, B, C, ...
>     i   lower roman         i, ii, iii, ...
>     I   upper roman         I, II, III, ...
>
>     The style is applied to the sequence number which by default
>     is reset to 1 for the first list item in an ordered list.
> -->
> <!ENTITY % OLStyle "CDATA">
>
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>   type        %OLStyle;      #IMPLIED
>   compact     (compact)      #IMPLIED
>   start       %Number;       #IMPLIED
>   >
>
> <!-- single column list (DEPRECATED) -->
> <!ELEMENT menu (li)+>
> <!ATTLIST menu
>   %attrs;
>   compact     (compact)     #IMPLIED
>   >
>
> <!-- multiple column list (DEPRECATED) -->
> <!ELEMENT dir (li)+>
> <!ATTLIST dir
>   %attrs;
>   compact     (compact)     #IMPLIED
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> <!-- LIStyle is constrained to: "(%ULStyle;|%OLStyle;)" -->
> <!ENTITY % LIStyle "CDATA">
>
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>   type        %LIStyle;      #IMPLIED
>   value       %Number;       #IMPLIED
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>   compact     (compact)      #IMPLIED
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< <!ELEMENT address %Inline;>
---
> <!ELEMENT address (#PCDATA | %inline; | %misc.inline; | p)*>
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>   align       (left|center|right) #IMPLIED
>   noshade     (noshade)      #IMPLIED
>   size        %Pixels;       #IMPLIED
>   width       %Length;       #IMPLIED
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< <!-- content is %Inline; excluding "img|object|big|small|sub|sup" -->
---
> <!-- content is %Inline; excluding
>         "img|object|applet|big|small|sub|sup|font|basefont" -->
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<   xml:space (preserve) #FIXED 'preserve'
---
>   width       %Number;      #IMPLIED
>   xml:space   (preserve)    #FIXED 'preserve'
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< <!ELEMENT blockquote %Block;>
---
> <!ELEMENT blockquote %Flow;>
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> <!--=================== Text alignment ===================================-->
>
> <!-- center content -->
> <!ELEMENT center %Flow;>
> <!ATTLIST center
>   %attrs;
>   >
>
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>   target      %FrameTarget;  #IMPLIED
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>   clear       (left|all|right|none) "none"
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> <!ELEMENT u %Inline;>   <!-- underline -->
> <!ATTLIST u %attrs;>
>
> <!ELEMENT s %Inline;>   <!-- strike-through -->
> <!ATTLIST s %attrs;>
>
> <!ELEMENT strike %Inline;>   <!-- strike-through -->
> <!ATTLIST strike %attrs;>
>
> <!ELEMENT basefont EMPTY>  <!-- base font size -->
> <!ATTLIST basefont
>   id          ID             #IMPLIED
>   size        CDATA          #REQUIRED
>   color       %Color;        #IMPLIED
>   face        CDATA          #IMPLIED
>   >
>
> <!ELEMENT font %Inline;> <!-- local change to font -->
> <!ATTLIST font
>   %coreattrs;
>   %i18n;
>   size        CDATA          #IMPLIED
>   color       %Color;        #IMPLIED
>   face        CDATA          #IMPLIED
>   >
>
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>   align       %ImgAlign;     #IMPLIED
>   border      %Pixels;       #IMPLIED
>   hspace      %Pixels;       #IMPLIED
>   vspace      %Pixels;       #IMPLIED
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<   name        CDATA          #IMPLIED
---
>   name        CDATA          #REQUIRED
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> <!--=================== Java applet ==================================-->
> <!--
>   One of code or object attributes must be present.
>   Place param elements before other content.
> -->
> <!ELEMENT applet (#PCDATA | param | %block; | form | %inline; | %misc;)*>
> <!ATTLIST applet
>   %coreattrs;
>   codebase    %URI;          #IMPLIED
>   archive     CDATA          #IMPLIED
>   code        CDATA          #IMPLIED
>   object      CDATA          #IMPLIED
>   alt         %Text;         #IMPLIED
>   name        NMTOKEN        #IMPLIED
>   width       %Length;       #REQUIRED
>   height      %Length;       #REQUIRED
>   align       %ImgAlign;     #IMPLIED
>   hspace      %Pixels;       #IMPLIED
>   vspace      %Pixels;       #IMPLIED
>   >
>
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<    Note that in this DTD there is no name attribute. That
<    is only available in the transitional and frameset DTD.
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>   name        NMTOKEN        #IMPLIED
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>   align       %ImgAlign;     #IMPLIED
>   border      %Length;       #IMPLIED
>   hspace      %Pixels;       #IMPLIED
>   vspace      %Pixels;       #IMPLIED
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<   name        NMTOKEN        #IMPLIED
---
>   name        CDATA          #IMPLIED
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>   target      %FrameTarget;  #IMPLIED
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>
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>   name        NMTOKEN        #IMPLIED
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>   target      %FrameTarget;  #IMPLIED
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>   align       %ImgAlign;     #IMPLIED
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> <!ENTITY % LAlign "(top|bottom|left|right)">
>
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>   align       %LAlign;       #IMPLIED
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<  Content is %Flow; excluding a, form and form controls
---
>  Content is %Flow; excluding a, form, form controls, iframe
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> <!-- single-line text input control (DEPRECATED) -->
> <!ELEMENT isindex EMPTY>
> <!ATTLIST isindex
>   %coreattrs;
>   %i18n;
>   prompt      %Text;         #IMPLIED
>   >
>
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> <!-- horizontal placement of table relative to document -->
> <!ENTITY % TAlign "(left|center|right)">
>
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>   align       %TAlign;       #IMPLIED
>   bgcolor     %Color;        #IMPLIED
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> <!ENTITY % CAlign "(top|bottom|left|right)">
>
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>   align       %CAlign;       #IMPLIED
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>   bgcolor     %Color;        #IMPLIED
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<
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>   nowrap      (nowrap)       #IMPLIED
>   bgcolor     %Color;        #IMPLIED
>   width       %Length;       #IMPLIED
>   height      %Length;       #IMPLIED
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>   nowrap      (nowrap)       #IMPLIED
>   bgcolor     %Color;        #IMPLIED
>   width       %Length;       #IMPLIED
>   height      %Length;       #IMPLIED
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