diff --git a/b2/HIERARCHY b/b2/HIERARCHY
index 4a01230..6304f12 100644
--- a/b2/HIERARCHY
+++ b/b2/HIERARCHY
@@ -1,5 +1,9 @@
-<comp> = R<C<L<D;
-<diode> = D<SCH<Z<TVS;
+/*
+ * Example hierarchy
+ */
+
+<comp> = R<C<L<D;	// order doesn't really matter
+<diode> = D<SCH<Z<TVS;	// D < SCH may make sense, the rest doesn't
 
 T=<comp> {
 	R:	{ R=#R TOL=%R };
diff --git a/b2/lang.l b/b2/lang.l
index ebbe5f8..907ffdb 100644
--- a/b2/lang.l
+++ b/b2/lang.l
@@ -31,6 +31,9 @@ static int lineno = 1;
 "<="				return TOK_LE;
 ">="				return TOK_GE;
 
+"//"[^\n]*			;
+"/*"([^*]|("*"+([^*/])))*"*"+"/" ;
+
 [ \t]				;
 \n				lineno++;
 ^#[^n]*\n			lineno++;