diff --git a/examples/eg_protocols.pdl b/examples/eg_protocols.pdl
index 20d134b9ef3ab7725484093bb04a050455a75b0e..3536ee88602ff2f20ade4989e1f0ffc3144facfa 100644
--- a/examples/eg_protocols.pdl
+++ b/examples/eg_protocols.pdl
@@ -1,33 +1 @@
-
-primitive forward(in i, out o) {
-	while(true) synchronous {
-		put(o, get(i));
-	}
-}
-composite dynamic(in i, out o) {
-	new forward(i, o);
-}
-primitive sync(in i, out o) {
-	while(true) synchronous {
-		if(fires(i)) {
-			put(o, get(i));
-		}
-	}
-}
-
-primitive sync_two(in ia, in ib, out oa, out ob) {
-	while(true) synchronous {
-		if (fires(ia)) {
-			put(oa, get(ia));
-			put(ob, get(ib));
-		}
-	}
-}
-
-primitive xor_three(in ai, out ao, in bi, out bo, in ci, out co) {
-	synchronous {
-		if      (fires(ai)) put(ao, get(ai));
-		else if (fires(bi)) put(bo, get(bi));
-		else                put(co, get(ci)); 
-	}
-}
\ No newline at end of file
+primitive foo(){}
\ No newline at end of file