hygene in XHTML 1.0 strict DTD

[Adam Di Carlo <adam@onshore.com>]

The XHTML 1.0 strict DTD as shipped with XHTML 1.0 spec
REC-xhtml1-20000126
 (which also carries this revision info:
   $Revision: 1.14 $
   $Date: 2000/01/25 23:52:20 $)

has some hygenic problems which emit warnings during validation.

To wit, a perfectly valid document will cause it to emit these
warnings:

> onsgmls -wxml -wall -s xhtml-1.0-strict.xml 
onsgmls:/usr/lib/sgml/dtd/xhtml-1.0/xhtml1-strict.dtd:97:0:W: unused parameter entity "MultiLengths"
onsgmls:/usr/lib/sgml/dtd/xhtml-1.0/xhtml1-strict.dtd:166:0:W: unused parameter entity "focus"
onsgmls:/usr/lib/sgml/dtd/xhtml-1.0/xhtml1-strict.dtd:885:0:W: unused parameter entity "CAlign"
onsgmls:/usr/lib/sgml/dtd/xhtml-1.0/xhtml1-strict.dtd:88:0:W: unused parameter entity "FrameTarget"
onsgmls:/usr/lib/sgml/dtd/xhtml-1.0/xhtml1-strict.dtd:844:0:W: unused parameter entity "TAlign"



Proposed remedy:

Apply the attached patch to the DTD, which fixes the problem (and also
actually makes the DTD a bit smaller, by actually taking advantage of
the %focus parameter entity).


Rationale:

It's disorienting to the user who is fastidious enough to check all
warnings against their document to find that the DTD itself has some
hygenic problems.

Please let me know if this information is useful -- I can go through
the rest of the XHTML 1.0 DTDs and correspondingly check and scrub
those as well.

-- 
.....Adam Di Carlo....adam@onShore.com.....<URL:http://www.onShore.com/>

Index: xhtml1-strict.dtd
===================================================================
RCS file: /usr/local/cvs/debian/sgml-data/xml/xhtml-1.0/xhtml1-strict.dtd,v
retrieving revision 1.2
diff -u -u -r1.2 xhtml1-strict.dtd
--- xhtml1-strict.dtd	2000/10/02 21:34:20	1.2
+++ xhtml1-strict.dtd	2001/02/05 03:21:34
@@ -85,18 +85,12 @@
 <!ENTITY % Text "CDATA">
     <!-- used for titles etc. -->
 
-<!ENTITY % FrameTarget "NMTOKEN">
-    <!-- render in this frame -->
-
 <!ENTITY % Length "CDATA">
     <!-- nn for pixels or nn% for percentage length -->
 
 <!ENTITY % MultiLength "CDATA">
     <!-- pixel, percentage, or relative -->
 
-<!ENTITY % MultiLengths "CDATA">
-    <!-- comma-separated list of MultiLength -->
-
 <!ENTITY % Pixels "CDATA">
     <!-- integer representing length in pixels -->
 
@@ -499,12 +493,9 @@
   hreflang    %LanguageCode; #IMPLIED
   rel         %LinkTypes;    #IMPLIED
   rev         %LinkTypes;    #IMPLIED
-  accesskey   %Character;    #IMPLIED
   shape       %Shape;        "rect"
   coords      %Coords;       #IMPLIED
-  tabindex    %Number;       #IMPLIED
-  onfocus     %Script;       #IMPLIED
-  onblur      %Script;       #IMPLIED
+  %focus;
   >
 
 <!--===================== Inline Elements ================================-->
@@ -676,10 +667,7 @@
   href        %URI;          #IMPLIED
   nohref      (nohref)       #IMPLIED
   alt         %Text;         #REQUIRED
-  tabindex    %Number;       #IMPLIED
-  accesskey   %Character;    #IMPLIED
-  onfocus     %Script;       #IMPLIED
-  onblur      %Script;       #IMPLIED
+  %focus;
   >
 
 <!--================ Forms ===============================================-->
@@ -731,13 +719,10 @@
   src         %URI;          #IMPLIED
   alt         CDATA          #IMPLIED
   usemap      %URI;          #IMPLIED
-  tabindex    %Number;       #IMPLIED
-  accesskey   %Character;    #IMPLIED
-  onfocus     %Script;       #IMPLIED
-  onblur      %Script;       #IMPLIED
   onselect    %Script;       #IMPLIED
   onchange    %Script;       #IMPLIED
   accept      %ContentTypes; #IMPLIED
+  %focus;
   >
 
 <!ELEMENT select (optgroup|option)+>  <!-- option selector -->
@@ -777,12 +762,9 @@
   cols        %Number;       #REQUIRED
   disabled    (disabled)     #IMPLIED
   readonly    (readonly)     #IMPLIED
-  tabindex    %Number;       #IMPLIED
-  accesskey   %Character;    #IMPLIED
-  onfocus     %Script;       #IMPLIED
-  onblur      %Script;       #IMPLIED
   onselect    %Script;       #IMPLIED
   onchange    %Script;       #IMPLIED
+  %focus;
   >
 
 <!--
@@ -811,10 +793,7 @@
   value       CDATA          #IMPLIED
   type        (button|submit|reset) "submit"
   disabled    (disabled)     #IMPLIED
-  tabindex    %Number;       #IMPLIED
-  accesskey   %Character;    #IMPLIED
-  onfocus     %Script;       #IMPLIED
-  onblur      %Script;       #IMPLIED
+  %focus;
   >
 
 <!--======================= Tables =======================================-->
@@ -840,9 +819,6 @@
 
 <!ENTITY % TRules "(none | groups | rows | cols | all)">
   
-<!-- horizontal placement of table relative to document -->
-<!ENTITY % TAlign "(left|center|right)">
-
 <!-- horizontal alignment attributes for cell contents
 
   char        alignment char, e.g. char=':'
@@ -881,8 +857,6 @@
   cellspacing %Length;       #IMPLIED
   cellpadding %Length;       #IMPLIED
   >
-
-<!ENTITY % CAlign "(top|bottom|left|right)">
 
 <!ATTLIST caption
   %attrs;