diff --git a/src/main/java/de/ids_mannheim/korap/query/serialize/AbstractSyntaxTree.java b/src/main/java/de/ids_mannheim/korap/query/serialize/AbstractSyntaxTree.java
index feeb503..a5418eb 100644
--- a/src/main/java/de/ids_mannheim/korap/query/serialize/AbstractSyntaxTree.java
+++ b/src/main/java/de/ids_mannheim/korap/query/serialize/AbstractSyntaxTree.java
@@ -101,8 +101,7 @@
 	
 	protected LinkedHashMap<String, Object> makeRepetition(int min, int max) {
 		LinkedHashMap<String, Object> group = makeGroup("repetition");
-		group.put("min", min);
-		group.put("max", max);
+		group.put("repetition", makeBoundary(min, max));
 		return group;
 	}
 	
diff --git a/src/main/java/de/ids_mannheim/korap/query/serialize/PoliqarpPlusTree.java b/src/main/java/de/ids_mannheim/korap/query/serialize/PoliqarpPlusTree.java
index 046f625..776009c 100644
--- a/src/main/java/de/ids_mannheim/korap/query/serialize/PoliqarpPlusTree.java
+++ b/src/main/java/de/ids_mannheim/korap/query/serialize/PoliqarpPlusTree.java
@@ -93,8 +93,7 @@
 			if (quantification != null) {
 				LinkedHashMap<String,Object> quantGroup = makeGroup("repetition");
 				int[] minmax = parseRepetition(quantification);
-				quantGroup.put("min", minmax[0]);
-				quantGroup.put("max", minmax[1]);
+				quantGroup.put("repetition", makeBoundary(minmax[0], minmax[1]));
 				putIntoSuperObject(quantGroup);
 				objectStack.push(quantGroup);
 				stackedObjects++;
diff --git a/src/test/java/PoliqarpPlusTreeTest.java b/src/test/java/PoliqarpPlusTreeTest.java
index 43da3a1..b7f6796 100644
--- a/src/test/java/PoliqarpPlusTreeTest.java
+++ b/src/test/java/PoliqarpPlusTreeTest.java
@@ -222,6 +222,18 @@
 		ppt = new PoliqarpPlusTree(query);
 		map = ppt.getRequestMap().get("query").toString();
 		assertEquals(expected.replaceAll(" ", ""), map.replaceAll(" ", ""));
+		
+		query = "<cnx/c!=vp (foundry/class=header&id=7)>";
+		expected = 
+			"{@type=korap:span, foundry=cnx, layer=c, key=vp, match=match:ne, attr=" +
+				"{@type=korap:termGroup, relation=relation:and, operands=[" +
+					"{@type=korap:term, foundry=foundry, key=class, value=header, match=match:eq}," +
+					"{@type=korap:term, key=id, value=7, match=match:eq}" +
+				"]}" +
+			"}";
+		ppt = new PoliqarpPlusTree(query);
+		map = ppt.getRequestMap().get("query").toString();
+		assertEquals(expected.replaceAll(" ", ""), map.replaceAll(" ", ""));
 	}
 	
 	@Test
@@ -411,7 +423,7 @@
 				"{@type=korap:group, operation=operation:sequence, operands=[" +
 					"{@type=korap:group, operation=operation:repetition, operands=[" +
 						"{@type=korap:token}" +
-					"], min=2, max=2}," +
+					"], repetition={@type=korap:boundary, min=2, max=2}}," +
 					"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=Mann, match=match:eq}}" +
 				"]}";
 		ppt = new PoliqarpPlusTree(query);
@@ -423,7 +435,7 @@
 				"{@type=korap:group, operation=operation:sequence, operands=[" +
 					"{@type=korap:group, operation=operation:repetition, operands=[" +
 						"{@type=korap:token}" +
-					"], min=1, max=100}," +
+					"], repetition={@type=korap:boundary, min=1, max=100}}," +
 					"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=Mann, match=match:eq}}" +
 				"]}";
 		ppt = new PoliqarpPlusTree(query);
@@ -435,11 +447,11 @@
 				"{@type=korap:group, operation=operation:sequence, operands=[" +
 					"{@type=korap:group, operation=operation:repetition, operands=[" +
 						"{@type=korap:token}" +
-					"], min=1, max=100}," +
+					"], repetition={@type=korap:boundary, min=1, max=100}}," +
 					"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=Mann, match=match:eq}}," +
 					"{@type=korap:group, operation=operation:repetition, operands=[" +
 						"{@type=korap:token}" +
-					"], min=2, max=2}" +
+					"], repetition={@type=korap:boundary, min=2, max=2}}" +
 				"]}";
 		ppt = new PoliqarpPlusTree(query);
 		map = ppt.getRequestMap().get("query").toString();
@@ -450,14 +462,14 @@
 				"{@type=korap:group, operation=operation:sequence, operands=[" +
 					"{@type=korap:group, operation=operation:repetition, operands=[" +
 						"{@type=korap:token}" +
-					"], min=1, max=100}," +
+					"], repetition={@type=korap:boundary, min=1, max=100}}," +
 					"{@type=korap:group, operation=operation:position, frame=frame:contains, operands=[" +
 					  "{@type=korap:span, key=s}," +
 					  "{@type=korap:span, key=np}" +
 					"]}," +
 					"{@type=korap:group, operation=operation:repetition, operands=[" +
 						"{@type=korap:token}" +
-					"], min=2, max=2}" +
+					"], repetition={@type=korap:boundary, min=2, max=2}}" +
 				"]}";
 		ppt = new PoliqarpPlusTree(query);
 		map = ppt.getRequestMap().get("query").toString();
@@ -508,7 +520,7 @@
 		// [base=foo]*
 		String occ1 = "{@type=korap:group, operation=operation:repetition, operands=[" +
 					     "{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
-					  "], min=0, max=100}"; 
+					  "], repetition={@type=korap:boundary, min=0, max=100}}"; 
 		ppt = new PoliqarpPlusTree("[base=foo]*");
 		map = ppt.getRequestMap().get("query").toString();
 		assertEquals(occ1.replaceAll(" ", ""), map.replaceAll(" ", ""));
@@ -518,7 +530,7 @@
 				"{@type=korap:group, operation=operation:sequence, operands=[" +
 					"{@type=korap:group, operation=operation:repetition, operands=[" +
 					     "{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
-					"], min=0, max=100 }," +
+					"], repetition={@type=korap:boundary, min=0, max=100} }," +
 					"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=bar, match=match:eq}}" +
 				"]}"; 
 		ppt = new PoliqarpPlusTree("[base=foo]*[base=bar]");
@@ -531,7 +543,7 @@
 					"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=bar, match=match:eq}}," +
 					"{@type=korap:group, operation=operation:repetition, operands=[" +
 					     "{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
-					"], min=0, max=100 }" +
+					"], repetition={@type=korap:boundary, min=0, max=100} }" +
 				"]}"; 
 		ppt = new PoliqarpPlusTree("[base=bar][base=foo]*");
 		map = ppt.getRequestMap().get("query").toString();
@@ -544,7 +556,7 @@
 						"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=bar, match=match:eq}}," +
 						"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
 					"]}" +
-				"], min=0, max=100}" ;
+				"], repetition={@type=korap:boundary, min=0, max=100}}" ;
 		ppt = new PoliqarpPlusTree("([base=bar][base=foo])*");
 		map = ppt.getRequestMap().get("query").toString();
 		assertEquals(occ4.replaceAll(" ", ""), map.replaceAll(" ", ""));
@@ -558,7 +570,7 @@
 							"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=bar, match=match:eq}}," +
 							"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
 						"]}" +
-					"], min=0, max=100 }" +
+					"], repetition={@type=korap:boundary, min=0, max=100} }" +
 				"]}" ;
 		ppt = new PoliqarpPlusTree("<s>([base=bar][base=foo])*");
 		map = ppt.getRequestMap().get("query").toString();
@@ -574,7 +586,7 @@
 							"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=bar, match=match:eq}}," +
 							"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
 						"]}" +
-					"], min=0, max=100 }" +
+					"], repetition={@type=korap:boundary, min=0, max=100} }" +
 				"]}" ;
 		ppt = new PoliqarpPlusTree("<s><np>([base=bar][base=foo])*");
 		map = ppt.getRequestMap().get("query").toString();
@@ -592,7 +604,7 @@
 							"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=bar, match=match:eq}}," +
 							"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
 						"]}" +
-					"], min=0, max=100 }," +
+					"], repetition={@type=korap:boundary, min=0, max=100} }," +
 					"{@type=korap:token, wrap={@type=korap:term, layer=p, key=NN, match=match:eq}}" +
 				"]}" ;
 		ppt = new PoliqarpPlusTree("<s><np>([base=bar][base=foo])*[p=NN]");
@@ -607,7 +619,7 @@
 							"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=bar, match=match:eq}}," +
 							"{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
 						"]}" +
-					"], min=0, max=100 }," +
+					"], repetition={@type=korap:boundary, min=0, max=100} }," +
 					"{@type=korap:token, wrap={@type=korap:term, layer=p, key=NN, match=match:eq}}" +
 				"]}" ;
 		ppt = new PoliqarpPlusTree("([base=bar][base=foo])*[p=NN]");
@@ -617,7 +629,7 @@
 		// [base=foo]+
 		String occ9 = "{@type=korap:group, operation=operation:repetition, operands=[" +
 					     "{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
-					  "], min=1, max=100}"; 
+					  "], repetition={@type=korap:boundary, min=1, max=100}}"; 
 		ppt = new PoliqarpPlusTree("[base=foo]+");
 		map = ppt.getRequestMap().get("query").toString();
 		assertEquals(occ9.replaceAll(" ", ""), map.replaceAll(" ", ""));
@@ -625,7 +637,7 @@
 		// [base=foo]?
 		String occ10 = "{@type=korap:group, operation=operation:repetition, operands=[" +
 					     "{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
-					  "], min=0, max=1}"; 
+					  "], repetition={@type=korap:boundary, min=0, max=1}}"; 
 		ppt = new PoliqarpPlusTree("[base=foo]?");
 		map = ppt.getRequestMap().get("query").toString();
 		assertEquals(occ10.replaceAll(" ", ""), map.replaceAll(" ", ""));
@@ -633,7 +645,7 @@
 		// [base=foo]{2,5}
 		String occ11 = "{@type=korap:group, operation=operation:repetition, operands=[" +
 					     "{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
-					  "], min=2, max=5}"; 
+					  "], repetition={@type=korap:boundary, min=2, max=5}}"; 
 		ppt = new PoliqarpPlusTree("[base=foo]{2,5}");
 		map = ppt.getRequestMap().get("query").toString();
 		assertEquals(occ11.replaceAll(" ", ""), map.replaceAll(" ", ""));
@@ -641,7 +653,7 @@
 		// [base=foo]{2}
 		String occ12 = "{@type=korap:group, operation=operation:repetition, operands=[" +
 					     "{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
-					  "], min=2, max=2}"; 
+					  "], repetition={@type=korap:boundary, min=2, max=2}}"; 
 		ppt = new PoliqarpPlusTree("[base=foo]{2}");
 		map = ppt.getRequestMap().get("query").toString();
 		assertEquals(occ12.replaceAll(" ", ""), map.replaceAll(" ", ""));
@@ -649,7 +661,7 @@
 		// [base=foo]{2}
 		String occ13 = "{@type=korap:group, operation=operation:repetition, operands=[" +
 					     "{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
-					  "], min=2, max=100}"; 
+					  "], repetition={@type=korap:boundary, min=2, max=100}}"; 
 		ppt = new PoliqarpPlusTree("[base=foo]{2,}");
 		map = ppt.getRequestMap().get("query").toString();
 		assertEquals(occ13.replaceAll(" ", ""), map.replaceAll(" ", ""));
@@ -657,7 +669,7 @@
 		// [base=foo]{2}
 		String occ14 = "{@type=korap:group, operation=operation:repetition, operands=[" +
 					     "{@type=korap:token, wrap={@type=korap:term, layer=lemma, key=foo, match=match:eq}}" +
-					  "], min=0, max=2}"; 
+					  "], repetition={@type=korap:boundary, min=0, max=2}}"; 
 		ppt = new PoliqarpPlusTree("[base=foo]{,2}");
 		map = ppt.getRequestMap().get("query").toString();
 		assertEquals(occ14.replaceAll(" ", ""), map.replaceAll(" ", ""));
@@ -935,7 +947,7 @@
 				  		"{@type=korap:span, key=s}," +
 				  		"{@type=korap:group, operation=operation:repetition, " +
 				  			"operands=[{@type=korap:token, wrap={@type=korap:term, layer=pos, key=N, match=match:eq}}" +
-				  			"], min=0, max=100" +
+				  			"], repetition={@type=korap:boundary, min=0, max=100}" +
 				  		"}" +
 				  	"]}";
 		ppt = new PoliqarpPlusTree("contains(<s>,[pos=N]*)");
@@ -950,7 +962,7 @@
 				  		"{@type=korap:span, key=s}," +
 				  		"{@type=korap:group, operation=operation:repetition, " +
 				  			"operands=[{@type=korap:token, wrap={@type=korap:term, layer=pos, key=N, match=match:eq}}" +
-				  			"], min=0, max=100" +
+				  			"], repetition={@type=korap:boundary, min=0, max=100}" +
 				  		"}" +
 				  	"]}" +
 				"]}";