Added new hook for working with extensible vs non-extensible

property sheets.

lib/python/OFS/properties.dtml

@@ -14,9 +14,13 @@
 <form action="." method="POST">
 <!--#if propertyMap-->
 <p>
-The following properties are defined for this item. To <a href="#addpropform">
+The following properties are defined for this item. 
+<!--#if property_extensible_schema__-->
+To <a href="#addpropform">
 add a new property</a>, enter a name, type and value for the new property 
-and click the &quot;Add&quot; button. To change property values, edit the 
+and click the &quot;Add&quot; button. 
+<!--#/if-->
+To change property values, edit the 
 values and click "Save Changes". 
 </p>
 <table border="0" cellspacing="0" cellpadding="2">
@@ -35,10 +39,10 @@ values and click "Save Changes".
   <!--#if "'w' in _['sequence-item'].get('mode', 'awd')"-->
   <!--#if "type in ('int', 'long', 'float', 'date')"-->
   <input type="text" name="<!--#var id-->:<!--#var type-->" size="35"
-   value="<!--#var "_[id]"-->">
+   value="<!--#var "getProperty(id)"-->">
   <!--#elif "type=='string'"-->
   <input type="text" name="<!--#var id-->:string" size="35"
-   value="<!--#var "_[id]" html_quote-->">
+   value="<!--#var "getProperty(id)" html_quote-->">
   <!--#elif "type=='boolean'"-->
   <input type="checkbox" name="<!--#var id-->:boolean" size="35"
    <!--#if "_[id]"-->CHECKED<!--#/if-->>
@@ -79,12 +83,15 @@ values and click "Save Changes".
 <!--#else-->
 <p>
 There are currently no properties defined for this item. 
+<!--#if property_extensible_schema__-->
 To add a property, click the &quot;Add...&quot; button.
+<!--#/if-->
 </p>
 
 <!--#endif-->
 </form>
 
+<!--#if property_extensible_schema__-->
 <a name="addpropform">
 <form action="<!--#var URL1-->/manage_addProperty" method="POST">
 <p>
@@ -122,6 +129,7 @@ button.
 </tr>
 </table>
 </form>
+<!--#/if-->
 <br><br><br><br><br><br><br><br>
 <br><br><br><br><br><br><br><br>
 <br><br><br><br><br><br><br><br>