--- loncom/build/lpml.dtd	2002/04/14 20:15:02	1.15
+++ loncom/build/lpml.dtd	2002/10/13 17:24:05	1.16
@@ -75,7 +75,7 @@ to only have one of two possible values:
   "always run", or
   "run if dependencies change"
 
-Note that you must type this text exactly in for the
+Note that you must type the trigger text values exactly for the
 attribute value to be understood and processed correctly
 by the lpml "make build" parser.
 -->
@@ -129,11 +129,19 @@ by the lpml "make build" parser.
 <!ELEMENT status (#PCDATA)>
 <!ELEMENT linkto (#PCDATA)>
 
-<!ELEMENT directory (targetdir+,categoryname,description?)>
+<!ELEMENT directory (protectionlevel,targetdir+,categoryname,description?)>
 <!ATTLIST directory
     dist CDATA #REQUIRED
     >
 
+<!ELEMENT protectionlevel (#PCDATA)>
+<!-- correct PCDATA values are:
+     "never_delete"
+     "weak_delete"
+     "modest_delete"
+     "strong_delete"
+     "absolute_delete"
+-->
 <!ELEMENT file (source,target+,categoryname,description?,buildlink?,
                 note?,build?,status?,dependencies?)>
 <!ELEMENT link (linkto,target,categoryname,description?,