Introducing a "supercard" element as to better describe the neb.x

input syntax. A supercard is a section of input that contains at 
least one namelist, card, or lower-level supercard.

An example of the supercard is the following input section of neb.x:

BEGIN_PATH_INPUT
   ... neb specific namelists and cards ...
BEGIN_PATH_INPUT


Here is how this is coded in the iNPUT_NEB.def file:

supercard BEGIN_PATH_INPUT -endtag END_PATH_INPUT {
   namelist PATH {
      ... etc.
   }
}



git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@12686 c92efa57-630b-4861-b058-cf58834340f0

dev-tools/helpdoc.schema

@@ -234,6 +234,39 @@ element optional    { ancestorElements }
 element conditional { ancestorElements }
 element group       { ancestorElements }
 
+element supercard {
+    ident 
+
+    optional {
+	interleave {
+	    attribute starttag { string }
+	    attribute endtag   { string }
+	    attribute remark   { text }
+	}
+    }
+    
+    interleave {
+	+ {
+	    optional {
+		ref supercard
+		ref namelist
+		ref card
+		ref linecard
+	    }
+	}
+
+	* {
+	    optional {
+		ref if
+		ref choose
+		ref label 
+		ref message
+		ref optional
+		ref conditional
+	    }
+	}
+    }
+}
 
 element namelist {
     ident
@@ -287,6 +320,7 @@ element linecard {
     interleave {
 	+ {
 	    optional {
+		ref keyword
 		ref var
 		ref vargroup
 		ref list
@@ -418,4 +452,4 @@ element paragraph {
     attribute title { text }
     ref text
 }
-element text { text } 
+element text { text }