SPR-8694 HTML5 updates to the "type" attribute of the Spring Form tags.

Since dynamic attributes were allowed in Spring 3, it raised the 
possibility to specify a type attribute on a number of the form tags.
Where it makes sense (see below) that attribute is now rejected
and reversely where it makes sense it is accepted.

InputTag allows types other than "text" but rejects type="radio" or 
type="checkbox" since there is a good reason for those to be used 
only in conjunction with the appropriate form library tags.

Other HTML input tags such as PasswordTag, HiddenInputTag, 
Checkbox(es)Tag and RadioBox(es)Tag check the dynamic attributes 
and reject them if they contain a type attribute since.

spring-framework-reference/src/view.xml

@@ -231,9 +231,11 @@ productList.url=/WEB-INF/jsp/productlist.jsp</programlisting>
       <section id="view-jsp-formtaglib-inputtag">
         <title>The <literal>input</literal> tag</title>
 
-        <para>This tag renders an HTML 'input' tag with type 'text' using the
-        bound value. For an example of this tag, see <xref
-        linkend="view-jsp-formtaglib-formtag" />.</para>
+        <para>This tag renders an HTML 'input' tag using the bound value
+        and type='text' by default. For an example of this tag, see <xref
+        linkend="view-jsp-formtaglib-formtag" />. Starting with Spring 3.1
+        you can use other types such HTML5-specific types like 'email', 
+        'tel', 'date', and others.</para>
       </section>
 
       <section id="view-jsp-formtaglib-checkboxtag">
@@ -805,6 +807,22 @@ public String deletePet(@PathVariable int ownerId, @PathVariable int petId) {
   return "redirect:/owners/" + ownerId;
 }</programlisting>
       </section>
+
+      <section id="view-jsp-formtaglib-html5">
+        <title>HTML5 Tags</title>
+			
+        <para>Starting with Spring 3, the Spring form tag library allows entering
+		dynamic attributes, which means you can enter any HTML5 specific attributes.
+		</para>
+
+        <para>In Spring 3.1, the form input tag supports entering a type attribute
+		other than 'text'. This is intended to allow rendering new HTML5 specific
+        input types such as 'email', 'date', 'range', and others. Note that 
+        entering type='text' is not required since 'text' is the default type.    
+		</para>
+
+      </section>
+
     </section>
   </section>