diff --git a/draft/application/cms/src/kernel/form/cms_form.e b/draft/application/cms/src/kernel/form/cms_form.e
index c6fb0354..988c522d 100644
--- a/draft/application/cms/src/kernel/form/cms_form.e
+++ b/draft/application/cms/src/kernel/form/cms_form.e
@@ -210,11 +210,11 @@ feature -- Change
 
 feature -- Conversion
 
-	to_html (a_theme: CMS_THEME): STRING_8
+	append_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		local
-			s: STRING
+			s: STRING_8
 		do
-			Result := "<form action=%""+ action +"%" id=%""+ id +"%" method=%""+ method +"%" "
+			a_html.append ("<form action=%""+ action +"%" id=%""+ id +"%" method=%""+ method +"%" ")
 			if not html_classes.is_empty then
 				create s.make_empty
 				across
@@ -225,15 +225,21 @@ feature -- Conversion
 					end
 					s.append (cl.item)
 				end
-				Result.append (" class=%"" + s + "%" ")
+				a_html.append (" class=%"" + s + "%" ")
 			end
-			Result.append (">%N")
+			a_html.append (">%N")
 			across
 				items as c
 			loop
-				Result.append (c.item.to_html (a_theme))
+				c.item.append_to_html (a_theme, a_html)
 			end
-			Result.append ("</form>%N")
+			a_html.append ("</form>%N")
+		end
+
+	to_html (a_theme: CMS_THEME): STRING_8
+		do
+			create Result.make_empty
+			append_to_html (a_theme, Result)
 		end
 
 feature {NONE} -- Implementation
diff --git a/draft/application/cms/src/kernel/form/cms_form_checkbox_input.e b/draft/application/cms/src/kernel/form/cms_form_checkbox_input.e
index 7bea1bcc..83ba26ea 100644
--- a/draft/application/cms/src/kernel/form/cms_form_checkbox_input.e
+++ b/draft/application/cms/src/kernel/form/cms_form_checkbox_input.e
@@ -14,7 +14,7 @@ inherit
 		redefine
 			set_value,
 			specific_input_attributes_string,
-			child_to_html
+			append_child_to_html
 		end
 
 	CMS_FORM_SELECTABLE_ITEM
@@ -83,16 +83,16 @@ feature -- Change
 
 feature {NONE} -- Implementation
 
-	child_to_html (a_theme: CMS_THEME): detachable READABLE_STRING_8
+	append_child_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 			-- Specific child element if any.	
 			--| To redefine if needed
 		do
 			if attached raw_text as t then
-				Result := t
+				a_html.append (t)
 			elseif attached text as t then
-				Result := a_theme.html_encoded (t)
+				a_html.append (a_theme.html_encoded (t))
 			elseif attached value as v then
-				Result := a_theme.html_encoded (v)
+				a_html.append (a_theme.html_encoded (v))
 			end
 		end
 
diff --git a/draft/application/cms/src/kernel/form/cms_form_div.e b/draft/application/cms/src/kernel/form/cms_form_div.e
index ead7d3aa..65dec274 100644
--- a/draft/application/cms/src/kernel/form/cms_form_div.e
+++ b/draft/application/cms/src/kernel/form/cms_form_div.e
@@ -66,20 +66,20 @@ feature -- Change
 
 feature -- Conversion
 
-	to_html (a_theme: CMS_THEME): STRING_8
+	append_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		do
-			Result := "<div"
-			append_css_class_to (Result, Void)
-			append_css_id_to (Result)
-			append_css_style_to (Result)
+			a_html.append ("<div")
+			append_css_class_to (a_html, Void)
+			append_css_id_to (a_html)
+			append_css_style_to (a_html)
 
-			Result.append (">%N")
+			a_html.append (">%N")
 			across
 				items as c
 			loop
-				Result.append (c.item.to_html (a_theme))
+				c.item.append_to_html (a_theme, a_html)
 			end
-			Result.append ("%N</div>%N")
+			a_html.append ("%N</div>%N")
 		end
 
 feature {NONE} -- Implementation
diff --git a/draft/application/cms/src/kernel/form/cms_form_field.e b/draft/application/cms/src/kernel/form/cms_form_field.e
index d2b43d39..a1179905 100644
--- a/draft/application/cms/src/kernel/form/cms_form_field.e
+++ b/draft/application/cms/src/kernel/form/cms_form_field.e
@@ -102,7 +102,7 @@ feature -- Element change
 
 feature -- Conversion
 
-	to_html (a_theme: CMS_THEME): STRING_8
+	append_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		local
 			l_class_items: detachable ARRAYED_LIST [READABLE_STRING_8]
 		do
@@ -117,28 +117,28 @@ feature -- Conversion
 				l_class_items := Void
 			end
 
-			create Result.make_from_string ("<div")
-			append_css_class_to (Result, l_class_items)
-			Result.append_character ('>')
+			a_html.append ("<div")
+			append_css_class_to (a_html, l_class_items)
+			a_html.append_character ('>')
 			if attached label as lab then
-				Result.append ("<strong><label for=%"" + name + "%">" + lab + "</label></strong>")
+				a_html.append ("<strong><label for=%"" + name + "%">" + lab + "</label></strong>")
 				if is_required then
-					Result.append (" (<em>required</em>)")
+					a_html.append (" (<em>required</em>)")
 				end
-				Result.append ("<br/>%N")
+				a_html.append ("<br/>%N")
 			end
-			Result.append (item_to_html (a_theme))
+			append_item_to_html (a_theme, a_html)
 			if attached description as desc then
 				if is_description_collapsible then
-					Result.append ("<div class=%"description collapsible%"><div>Description ...</div><div>" + desc + "</div></div>")
+					a_html.append ("<div class=%"description collapsible%"><div>Description ...</div><div>" + desc + "</div></div>")
 				else
-					Result.append ("<div class=%"description%">" + desc + "</div>")
+					a_html.append ("<div class=%"description%">" + desc + "</div>")
 				end
 			end
-			Result.append ("</div>")
+			a_html.append ("</div>")
 		end
 
-	item_to_html (a_theme: CMS_THEME): STRING_8
+	append_item_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		deferred
 		end
 
diff --git a/draft/application/cms/src/kernel/form/cms_form_field_set.e b/draft/application/cms/src/kernel/form/cms_form_field_set.e
index 9e18693d..2a9af0a5 100644
--- a/draft/application/cms/src/kernel/form/cms_form_field_set.e
+++ b/draft/application/cms/src/kernel/form/cms_form_field_set.e
@@ -82,23 +82,23 @@ feature -- Change
 
 feature -- Conversion
 
-	to_html (a_theme: CMS_THEME): STRING_8
+	append_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		do
-			Result := "<fieldset"
-			append_css_class_to (Result, Void)
-			append_css_id_to (Result)
-			append_css_style_to (Result)
+			a_html.append ("<fieldset")
+			append_css_class_to (a_html, Void)
+			append_css_id_to (a_html)
+			append_css_style_to (a_html)
 
-			Result.append (">%N")
+			a_html.append (">%N")
 			if attached legend as leg then
-				Result.append ("<legend>" + leg + "</legend>%N")
+				a_html.append ("<legend>" + leg + "</legend>%N")
 			end
 			across
 				items as c
 			loop
-				Result.append (c.item.to_html (a_theme))
+				c.item.append_to_html (a_theme, a_html)
 			end
-			Result.append ("%N</fieldset>%N")
+			a_html.append ("%N</fieldset>%N")
 		end
 
 feature {NONE} -- Implementation
diff --git a/draft/application/cms/src/kernel/form/cms_form_hidden_input.e b/draft/application/cms/src/kernel/form/cms_form_hidden_input.e
index 8422a9fe..7056cdc2 100644
--- a/draft/application/cms/src/kernel/form/cms_form_hidden_input.e
+++ b/draft/application/cms/src/kernel/form/cms_form_hidden_input.e
@@ -11,7 +11,7 @@ inherit
 	CMS_FORM_INPUT
 		redefine
 			input_type,
-			item_to_html
+			append_item_to_html
 		end
 
 create
@@ -27,11 +27,11 @@ feature -- Access
 
 feature -- Conversion
 
-	item_to_html (a_theme: CMS_THEME): STRING_8
+	append_item_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		do
-			Result := "<div style=%"display:none%">"
-			Result.append (Precursor (a_theme))
-			Result.append ("</div>")
+			a_html.append ("<div style=%"display:none%">")
+			Precursor (a_theme, a_html)
+			a_html.append ("</div>")
 		end
 
 end
diff --git a/draft/application/cms/src/kernel/form/cms_form_input.e b/draft/application/cms/src/kernel/form/cms_form_input.e
index f1dfca1c..ae74f5c1 100644
--- a/draft/application/cms/src/kernel/form/cms_form_input.e
+++ b/draft/application/cms/src/kernel/form/cms_form_input.e
@@ -78,45 +78,50 @@ feature -- Element change
 
 feature -- Conversion
 
-	item_to_html (a_theme: CMS_THEME): STRING_8
+	append_item_to_html (a_theme: CMS_THEME; a_html: STRING_8)
+		local
+			old_count: INTEGER
 		do
-			Result := "<input type=%""+ input_type +"%" name=%""+ name +"%""
-			append_css_class_to (Result, Void)
-			append_css_id_to (Result)
-			append_css_style_to (Result)
+			a_html.append ("<input type=%""+ input_type +"%" name=%""+ name +"%"")
+			append_css_class_to (a_html, Void)
+			append_css_id_to (a_html)
+			append_css_style_to (a_html)
 
 			if is_readonly then
-				Result.append (" readonly=%"readonly%"")
+				a_html.append (" readonly=%"readonly%"")
 			end
 			if attached default_value as dft then
-				Result.append (" value=%"" + a_theme.html_encoded (dft) + "%"")
+				a_html.append (" value=%"" + a_theme.html_encoded (dft) + "%"")
 			end
 			if disabled then
-				Result.append (" disabled=%"disabled%"")
+				a_html.append (" disabled=%"disabled%"")
 			end
 			if size > 0 then
-				Result.append (" size=%"" + size.out + "%"")
+				a_html.append (" size=%"" + size.out + "%"")
 			end
 			if maxlength > 0 then
-				Result.append (" maxlength=%"" + maxlength.out + "%"")
+				a_html.append (" maxlength=%"" + maxlength.out + "%"")
 			end
 
 			if attached specific_input_attributes_string as s then
-				Result.append_character (' ')
-				Result.append (s)
+				a_html.append_character (' ')
+				a_html.append (s)
 			end
-			if attached child_to_html (a_theme) as s then
-				Result.append (">")
-				Result.append (s)
-				Result.append ("</input>")
+			a_html.append (">")
+			old_count := a_html.count
+			append_child_to_html (a_theme, a_html)
+			if a_html.count > old_count then
+				a_html.append ("</input>")
 			else
-				Result.append ("/>")
+				check a_html.item (a_html.count) = '>' end
+				a_html.put ('/', a_html.count) -- replace previous '>'
+				a_html.append (">")
 			end
 		end
 
 feature {NONE} -- Implementation
 
-	child_to_html (a_theme: CMS_THEME): detachable READABLE_STRING_8
+	append_child_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 			-- Specific child element if any.	
 			--| To redefine if needed
 		do
diff --git a/draft/application/cms/src/kernel/form/cms_form_item.e b/draft/application/cms/src/kernel/form/cms_form_item.e
index 2718568d..7b7f908f 100644
--- a/draft/application/cms/src/kernel/form/cms_form_item.e
+++ b/draft/application/cms/src/kernel/form/cms_form_item.e
@@ -14,8 +14,14 @@ inherit
 
 feature -- Conversion
 
-	to_html (a_theme: CMS_THEME): STRING_8
+	append_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		deferred
 		end
 
+	to_html (a_theme: CMS_THEME): STRING_8
+		do
+			create Result.make_empty
+			append_to_html (a_theme, Result)
+		end
+
 end
diff --git a/draft/application/cms/src/kernel/form/cms_form_raw_text.e b/draft/application/cms/src/kernel/form/cms_form_raw_text.e
index bd5df16f..915dace7 100644
--- a/draft/application/cms/src/kernel/form/cms_form_raw_text.e
+++ b/draft/application/cms/src/kernel/form/cms_form_raw_text.e
@@ -10,7 +10,7 @@ class
 inherit
 	CMS_FORM_ITEM
 		redefine
-			to_html
+			append_to_html
 		end
 
 create
@@ -36,14 +36,14 @@ feature -- Element change
 
 feature -- Conversion
 
-	to_html (a_theme: CMS_THEME): STRING_8
+	append_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		do
-			Result := item_to_html (a_theme)
+			append_item_html_to (a_theme, a_html)
 		end
 
-	item_to_html (a_theme: CMS_THEME): STRING_8
+	append_item_html_to (a_theme: CMS_THEME; a_html: STRING_8)
 		do
-			Result := text
+			a_html.append (text)
 		end
 
 end
diff --git a/draft/application/cms/src/kernel/form/cms_form_select.e b/draft/application/cms/src/kernel/form/cms_form_select.e
index b793df82..acdd6db6 100644
--- a/draft/application/cms/src/kernel/form/cms_form_select.e
+++ b/draft/application/cms/src/kernel/form/cms_form_select.e
@@ -103,38 +103,38 @@ feature -- Element change
 
 feature -- Conversion
 
-	item_to_html (a_theme: CMS_THEME): STRING_8
+	append_item_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		local
 			l_is_already_selected: BOOLEAN
 			h: detachable STRING_8
 		do
-			Result := "<select name=%""+ name +"%" "
+			a_html.append ("<select name=%""+ name +"%" ")
 			if css_id = Void then
-				set_css_id (name +"-select")
+				set_css_id (name + "-select")
 			end
-			append_css_class_to (Result, Void)
-			append_css_id_to (Result)
-			append_css_style_to (Result)
+			append_css_class_to (a_html, Void)
+			append_css_id_to (a_html)
+			append_css_style_to (a_html)
 
 			if is_readonly then
-				Result.append (" readonly=%"readonly%" />")
+				a_html.append (" readonly=%"readonly%" />")
 			else
-				Result.append ("/>")
+				a_html.append ("/>")
 			end
 
 			across
 				options as o
 			loop
-				Result.append ("<option value=%"" + o.item.value + "%" ")
+				a_html.append ("<option value=%"" + o.item.value + "%" ")
 --				if not l_is_already_selected then
 					if
 						o.item.is_selected
 					then
 						l_is_already_selected := True
-						Result.append (" selected=%"selected%"")
+						a_html.append (" selected=%"selected%"")
 					end
 --				end
-				Result.append (">" + o.item.text + "</option>%N")
+				a_html.append (">" + o.item.text + "</option>%N")
 				if attached o.item.description as d then
 					if h = Void then
 						create h.make_empty
@@ -142,9 +142,9 @@ feature -- Conversion
 					h.append ("<div id=%"" + name + "-" + o.item.value + "%" class=%"option%"><strong>"+ o.item.text +"</strong>:"+ d + "</div>")
 				end
 			end
-			Result.append ("</select>%N")
+			a_html.append ("</select>%N")
 			if h /= Void then
-				Result.append ("<div class=%"select help collapsible%" id=%"" + name + "-help%">" + h + "</div>%N")
+				a_html.append ("<div class=%"select help collapsible%" id=%"" + name + "-help%">" + h + "</div>%N")
 			end
 		end
 
diff --git a/draft/application/cms/src/kernel/form/cms_form_textarea.e b/draft/application/cms/src/kernel/form/cms_form_textarea.e
index dd6f37fe..b71bb5ba 100644
--- a/draft/application/cms/src/kernel/form/cms_form_textarea.e
+++ b/draft/application/cms/src/kernel/form/cms_form_textarea.e
@@ -61,30 +61,29 @@ feature -- Element change
 
 feature -- Conversion
 
-	item_to_html (a_theme: CMS_THEME): STRING_8
+	append_item_to_html (a_theme: CMS_THEME; a_html: STRING_8)
 		do
-			Result := "<textarea name=%""+ name +"%""
+			a_html.append ("<textarea name=%""+ name +"%"")
 			if rows > 0 then
-				Result.append (" rows=%"" + rows.out + "%"")
+				a_html.append (" rows=%"" + rows.out + "%"")
 			end
 			if cols > 0 then
-				Result.append (" cols=%"" + cols.out + "%"")
+				a_html.append (" cols=%"" + cols.out + "%"")
 			end
 
-			append_css_class_to (Result, Void)
-			append_css_id_to (Result)
-			append_css_style_to (Result)
-
+			append_css_class_to (a_html, Void)
+			append_css_id_to (a_html)
+			append_css_style_to (a_html)
 
 			if is_readonly then
-				Result.append (" readonly=%"readonly%">")
+				a_html.append (" readonly=%"readonly%">")
 			else
-				Result.append (">")
+				a_html.append (">")
 			end
 			if attached default_value as dft then
-				Result.append (a_theme.html_encoded (dft))
+				a_html.append (a_theme.html_encoded (dft))
 			end
-			Result.append ("</textarea>")
+			a_html.append ("</textarea>")
 		end
 
 end
diff --git a/draft/application/cms/src/modules/node/node_add_cms_execution.e b/draft/application/cms/src/modules/node/node_add_cms_execution.e
index 0176576b..bfe43dba 100644
--- a/draft/application/cms/src/modules/node/node_add_cms_execution.e
+++ b/draft/application/cms/src/modules/node/node_add_cms_execution.e
@@ -82,7 +82,7 @@ feature -- Execution
 								end
 								fd.apply_to_associated_form
 							end
-							b.append (f.to_html (theme))
+							f.append_to_html (theme, b)
 						end
 					else
 						set_title ("Access denied")
diff --git a/draft/application/cms/src/modules/node/node_edit_cms_execution.e b/draft/application/cms/src/modules/node/node_edit_cms_execution.e
index 778c12d1..3153c177 100644
--- a/draft/application/cms/src/modules/node/node_edit_cms_execution.e
+++ b/draft/application/cms/src/modules/node/node_edit_cms_execution.e
@@ -87,7 +87,7 @@ feature -- Execution
 								end
 								fd.apply_to_associated_form
 							end
-							b.append (f.to_html (theme))
+							f.append_to_html (theme, b)
 						end
 					else
 						b.append ("<h1>Access denied</h1>")
diff --git a/draft/application/cms/src/modules/user/user_cms_execution.e b/draft/application/cms/src/modules/user/user_cms_execution.e
index 6061694d..6f063958 100644
--- a/draft/application/cms/src/modules/user/user_cms_execution.e
+++ b/draft/application/cms/src/modules/user/user_cms_execution.e
@@ -112,7 +112,7 @@ feature -- Execution
 					end
 					fd.apply_to_associated_form
 				end
-				b.append (f.to_html (theme))
+				f.append_to_html (theme, b)
 				set_main_content (b)
 			end
 		end
diff --git a/draft/application/cms/src/modules/user/user_edit_cms_execution.e b/draft/application/cms/src/modules/user/user_edit_cms_execution.e
index b0af2ec5..d4930d69 100644
--- a/draft/application/cms/src/modules/user/user_edit_cms_execution.e
+++ b/draft/application/cms/src/modules/user/user_edit_cms_execution.e
@@ -105,7 +105,7 @@ feature -- Execution
 						end
 						fd.apply_to_associated_form
 					end
-					b.append (f.to_html (theme))
+					f.append_to_html (theme, b)
 				end
 			end
 			set_main_content (b)
diff --git a/draft/application/cms/src/modules/user/user_new_password_cms_execution.e b/draft/application/cms/src/modules/user/user_new_password_cms_execution.e
index 550f0676..00b1af92 100644
--- a/draft/application/cms/src/modules/user/user_new_password_cms_execution.e
+++ b/draft/application/cms/src/modules/user/user_new_password_cms_execution.e
@@ -34,7 +34,7 @@ feature -- Execution
 					if attached u.email as l_email then
 						f := new_password_form (url (request.path_info, Void), "new-password")
 						b.append ("Password reset instructions will be mailed to <em>" + l_email + "</em>. You must " +  link ("log out", "/user/logout", Void)  + " to use the password reset link in the e-mail.")
-						b.append (f.to_html (theme))
+						f.append_to_html (theme, b)
 					else
 						b.append ("Your account does not have any email address set!")
 						set_redirection (url ("/user/"+ u.id.out +"/edit", Void))
@@ -84,7 +84,7 @@ feature -- Execution
 						end
 						fd.apply_to_associated_form
 					end
-					b.append (f.to_html (theme))
+					f.append_to_html (theme, b)
 				end
 			end
 			set_main_content (b)
diff --git a/draft/application/cms/src/modules/user/user_register_cms_execution.e b/draft/application/cms/src/modules/user/user_register_cms_execution.e
index 95395022..b1b4d819 100644
--- a/draft/application/cms/src/modules/user/user_register_cms_execution.e
+++ b/draft/application/cms/src/modules/user/user_register_cms_execution.e
@@ -103,7 +103,7 @@ feature -- Execution
 						end
 						fd.apply_to_associated_form
 					end
-					b.append (f.to_html (theme))
+					f.append_to_html (theme, b)
 				end
 			end
 			set_main_content (b)