diff --git a/Changes b/Changes
index 06cc8b4..43009a8 100644
--- a/Changes
+++ b/Changes
@@ -3,7 +3,8 @@
 - Add institution & landingPage to the resource web-service (#777)
 - Make URL mandatory for plugin registration (#573)
 - Remove hidden group from test database
-- Implemented QueryContextRewrite (#755)  
+- Implemented QueryContextRewrite (#755)
+- Replace operation:insertion with operation:injection (#778) 
 
 
 # version 0.75
diff --git a/src/main/java/de/ids_mannheim/korap/rewrite/CollectionRewrite.java b/src/main/java/de/ids_mannheim/korap/rewrite/CollectionRewrite.java
index 56b0092..970efdd 100644
--- a/src/main/java/de/ids_mannheim/korap/rewrite/CollectionRewrite.java
+++ b/src/main/java/de/ids_mannheim/korap/rewrite/CollectionRewrite.java
@@ -24,8 +24,7 @@
 
 /**
  * CollectionRewrite determines which availability field values are
- * possible for a user with respect to his mean and location of
- * access.
+ * possible for a user with respect to login and location of access.
  * 
  * <br/><br/>
  * KorAP differentiates 3 kinds of access:
@@ -36,14 +35,12 @@
  * </ul>
  * 
  * Each of these accesses corresponds to a regular expression of
- * license
- * formats defined in kustvakt.conf. For a given access, only those
+ * license formats defined in kustvakt.conf. For a given access, only those
  * resources whose availability field matches its regular expression
  * are allowed to be retrieved.
  * 
  * 
  * @author margaretha
- * @last-update 21 Nov 2017
  * @see CorpusAccess
  */
 public class CollectionRewrite implements RewriteTask.RewriteQuery {
diff --git a/src/main/java/de/ids_mannheim/korap/rewrite/KoralNode.java b/src/main/java/de/ids_mannheim/korap/rewrite/KoralNode.java
index 0893820..52eb5dc 100644
--- a/src/main/java/de/ids_mannheim/korap/rewrite/KoralNode.java
+++ b/src/main/java/de/ids_mannheim/korap/rewrite/KoralNode.java
@@ -114,6 +114,10 @@
         }
     }
 
+    // EM: we agree to use injection instead because it has been introduced to
+    // public in several occasions.
+    // This method is similar to put
+    @Deprecated
     public void set (String name, Object value, RewriteIdentifier ident) {
         if (this.node.isObject()) {
             ObjectNode n = (ObjectNode) this.node;
@@ -127,7 +131,7 @@
             if (ident != null)
                 name = ident.toString();
 
-            this.rewrites.add("insertion", name);
+            this.rewrites.add("injection", name);
         }
     }
 
@@ -136,7 +140,7 @@
             ObjectNode n = (ObjectNode) this.node;
             n.setAll(other);
         }
-        this.rewrites.add("insertion", null);
+        this.rewrites.add("injection", null);
     }
 
     public String get (String name) {
@@ -173,6 +177,11 @@
         private String scope, value;
         private Object source;
 
+        public RewriteIdentifier (String scope) {
+            this.scope = scope;
+        }
+        
+        @Deprecated
         public RewriteIdentifier (String scope, String value) {
             this.scope = scope;
             this.value = value;
diff --git a/src/main/java/de/ids_mannheim/korap/rewrite/VirtualCorpusRewrite.java b/src/main/java/de/ids_mannheim/korap/rewrite/VirtualCorpusRewrite.java
index 3a64df9..2fe7502 100644
--- a/src/main/java/de/ids_mannheim/korap/rewrite/VirtualCorpusRewrite.java
+++ b/src/main/java/de/ids_mannheim/korap/rewrite/VirtualCorpusRewrite.java
@@ -102,7 +102,8 @@
         koralNode.remove("ref", new RewriteIdentifier("ref", ref));
 
         ref = ref.substring(vcOwner.length() + 1, ref.length());
-        koralNode.set("ref", ref, new RewriteIdentifier("ref", ref));
+        koralNode.put("ref", ref);
+//        koralNode.set("ref", ref, new RewriteIdentifier("ref", ref));
     }
 
     private void rewriteVC (QueryDO vc, KoralNode koralNode)
diff --git a/src/test/java/de/ids_mannheim/korap/config/TestVariables.java b/src/test/java/de/ids_mannheim/korap/config/TestVariables.java
index e4658ce..b29d947 100644
--- a/src/test/java/de/ids_mannheim/korap/config/TestVariables.java
+++ b/src/test/java/de/ids_mannheim/korap/config/TestVariables.java
@@ -44,7 +44,7 @@
             + "\t\t}],\n" + "\t\t\"rewrites\": [{\n"
             + "\t\t\t\"@type\": \"koral:rewrite\",\n"
             + "\t\t\t\"src\": \"Kustvakt\",\n"
-            + "\t\t\t\"operation\": \"operation:insertion\",\n"
+            + "\t\t\t\"operation\": \"operation:injection\",\n"
             + "\t\t\t\"scope\": \"corpusSigle\"\n" + "\t\t}]\n" + "\t},\n"
             + "\t\"matches\": [{\n" + "\t\t\"field\": \"tokens\",\n"
             + "\t\t\"textClass\": \"wissenschaft populaerwissenschaft\",\n"
diff --git a/src/test/java/de/ids_mannheim/korap/rewrite/VirtualCorpusRewriteTest.java b/src/test/java/de/ids_mannheim/korap/rewrite/VirtualCorpusRewriteTest.java
index f35096c..b3a308f 100644
--- a/src/test/java/de/ids_mannheim/korap/rewrite/VirtualCorpusRewriteTest.java
+++ b/src/test/java/de/ids_mannheim/korap/rewrite/VirtualCorpusRewriteTest.java
@@ -70,7 +70,7 @@
         node = node.at("/operands/1/rewrites");
         assertEquals(2, node.size());
         assertEquals(node.at("/0/operation").asText(), "operation:deletion");
-        assertEquals(node.at("/1/operation").asText(), "operation:insertion");
+        assertEquals(node.at("/1/operation").asText(), "operation:injection");
     }
 
     @Test
@@ -91,7 +91,7 @@
         assertEquals(3, node.size());
         assertEquals(node.at("/0/operation").asText(), "operation:deletion");
         assertEquals(node.at("/1/operation").asText(), "operation:deletion");
-        assertEquals(node.at("/2/operation").asText(), "operation:insertion");
+        assertEquals(node.at("/2/operation").asText(), "operation:injection");
     }
 
     @Test
@@ -111,7 +111,7 @@
         assertEquals(3, node.size());
         assertEquals(node.at("/0/operation").asText(), "operation:deletion");
         assertEquals(node.at("/1/operation").asText(), "operation:deletion");
-        assertEquals(node.at("/2/operation").asText(), "operation:insertion");
+        assertEquals(node.at("/2/operation").asText(), "operation:injection");
     }
 
     @Test
diff --git a/src/test/java/de/ids_mannheim/korap/web/controller/AvailabilityTest.java b/src/test/java/de/ids_mannheim/korap/web/controller/AvailabilityTest.java
index 4ad3ba3..4cc98b0 100644
--- a/src/test/java/de/ids_mannheim/korap/web/controller/AvailabilityTest.java
+++ b/src/test/java/de/ids_mannheim/korap/web/controller/AvailabilityTest.java
@@ -26,7 +26,7 @@
         assertEquals(node.at("/collection/operands/0/value").asText(),
                 "CC.*");
         assertEquals(node.at("/collection/rewrites/0/operation").asText(),
-                "operation:insertion");
+                "operation:injection");
         assertEquals(node.at("/collection/rewrites/0/scope").asText(),
                 "availability(FREE)");
     }
@@ -63,7 +63,7 @@
                         .asText(),
                 "QAO-NC");
         assertEquals(node.at("/collection/rewrites/0/operation").asText(),
-                "operation:insertion");
+                "operation:injection");
         assertEquals(node.at("/collection/rewrites/0/scope").asText(),
                 "availability(PUB)");
     }
@@ -74,7 +74,7 @@
         assertEquals(node.at("/collection/operation").asText(),
                 "operation:and");
         assertEquals(node.at("/collection/rewrites/0/operation").asText(),
-                "operation:insertion");
+                "operation:injection");
         assertEquals(node.at("/collection/rewrites/0/scope").asText(),
                 "availability(PUB)");
         assertEquals(node.at("/collection/operands/1/match").asText(),
@@ -104,7 +104,7 @@
         assertEquals(node.at("/collection/operation").asText(),
                 "operation:and");
         assertEquals(node.at("/collection/rewrites/0/operation").asText(),
-                "operation:insertion");
+                "operation:injection");
         assertEquals(node.at("/collection/rewrites/0/scope").asText(),
                 "availability(ALL)");
         assertEquals(node.at("/collection/operands/1/match").asText(),
diff --git a/src/test/java/de/ids_mannheim/korap/web/controller/SearchControllerTest.java b/src/test/java/de/ids_mannheim/korap/web/controller/SearchControllerTest.java
index 181ec65..132f6b0 100644
--- a/src/test/java/de/ids_mannheim/korap/web/controller/SearchControllerTest.java
+++ b/src/test/java/de/ids_mannheim/korap/web/controller/SearchControllerTest.java
@@ -120,7 +120,7 @@
         assertEquals("CC.*", node.at("/collection/value").asText());
         assertEquals("availability(FREE)",
                 node.at("/collection/rewrites/0/scope").asText());
-        assertEquals("operation:insertion",
+        assertEquals("operation:injection",
                 node.at("/collection/rewrites/0/operation").asText());
     }
 
@@ -183,7 +183,7 @@
         assertEquals("CC.*", node.at("/collection/value").asText());
         assertEquals("availability(FREE)",
                 node.at("/collection/rewrites/0/scope").asText());
-        assertEquals("operation:insertion",
+        assertEquals("operation:injection",
                 node.at("/collection/rewrites/0/operation").asText());
     }
 
@@ -203,7 +203,7 @@
         assertEquals("CC.*", node.at("/collection/value").asText());
         assertEquals("availability(FREE)",
                 node.at("/collection/rewrites/0/scope").asText());
-        assertEquals("operation:insertion",
+        assertEquals("operation:injection",
                 node.at("/collection/rewrites/0/operation").asText());
     }
 
@@ -232,7 +232,7 @@
         assertEquals("operation:or", node.at("/collection/operation").asText());
         assertEquals("availability(PUB)",
                 node.at("/collection/rewrites/0/scope").asText());
-        assertEquals("operation:insertion",
+        assertEquals("operation:injection",
                 node.at("/collection/rewrites/0/operation").asText());
     }
 
@@ -264,7 +264,7 @@
         assertEquals("operation:or", node.at("/collection/operation").asText());
         assertEquals("availability(ALL)",
                 node.at("/collection/rewrites/0/scope").asText());
-        assertEquals("operation:insertion",
+        assertEquals("operation:injection",
                 node.at("/collection/rewrites/0/operation").asText());
     }
 
@@ -327,7 +327,7 @@
         assertEquals(Status.OK.getStatusCode(), response.getStatus());
         JsonNode node = JsonUtils.readTree(response.readEntity(String.class));
         assertNotNull(node);
-        assertEquals("operation:insertion",
+        assertEquals("operation:injection",
                 node.at("/collection/rewrites/0/operation").asText());
         assertEquals("availability(FREE)",
                 node.at("/collection/rewrites/0/scope").asText());
diff --git a/src/test/java/de/ids_mannheim/korap/web/controller/SearchPipeTest.java b/src/test/java/de/ids_mannheim/korap/web/controller/SearchPipeTest.java
index 03a019e..39f1cf9 100644
--- a/src/test/java/de/ids_mannheim/korap/web/controller/SearchPipeTest.java
+++ b/src/test/java/de/ids_mannheim/korap/web/controller/SearchPipeTest.java
@@ -117,7 +117,7 @@
         assertEquals(2, node.at("/query/wrap/key").size());
         assertEquals(1, node.at("/collection/rewrites").size());
         assertEquals(node.at("/collection/rewrites/0/operation").asText(),
-                "operation:insertion");
+                "operation:injection");
         assertEquals(node.at("/collection/rewrites/0/scope").asText(),
                 "availability(FREE)");
         node = node.at("/query/wrap/rewrites");
diff --git a/src/test/java/de/ids_mannheim/korap/web/controller/SearchPublicMetadataTest.java b/src/test/java/de/ids_mannheim/korap/web/controller/SearchPublicMetadataTest.java
index aeec05e..cd5e617 100644
--- a/src/test/java/de/ids_mannheim/korap/web/controller/SearchPublicMetadataTest.java
+++ b/src/test/java/de/ids_mannheim/korap/web/controller/SearchPublicMetadataTest.java
@@ -131,7 +131,7 @@
                 "operation:deletion");
         assertEquals(node.at("/rewrites/1/scope").asText(), "ref(system-vc)");
         assertEquals(node.at("/rewrites/2/operation").asText(),
-                "operation:insertion");
+                "operation:injection");
     }
 
     @Test
diff --git a/src/test/java/de/ids_mannheim/korap/web/controller/vc/VirtualCorpusReferenceTest.java b/src/test/java/de/ids_mannheim/korap/web/controller/vc/VirtualCorpusReferenceTest.java
index 6b908e9..76377a2 100644
--- a/src/test/java/de/ids_mannheim/korap/web/controller/vc/VirtualCorpusReferenceTest.java
+++ b/src/test/java/de/ids_mannheim/korap/web/controller/vc/VirtualCorpusReferenceTest.java
@@ -193,7 +193,7 @@
         assertEquals(node.at("/0/scope").asText(), "@type(koral:docGroupRef)");
         assertEquals(node.at("/1/operation").asText(), "operation:deletion");
         assertEquals(node.at("/1/scope").asText(), "ref(marlin/published-vc)");
-        assertEquals(node.at("/2/operation").asText(), "operation:insertion");
+        assertEquals(node.at("/2/operation").asText(), "operation:injection");
     }
 
     @Test
diff --git a/src/test/resources/network-output/search-result.jsonld b/src/test/resources/network-output/search-result.jsonld
index 2c364fd..0dbf855 100644
--- a/src/test/resources/network-output/search-result.jsonld
+++ b/src/test/resources/network-output/search-result.jsonld
@@ -64,7 +64,7 @@
             {
                 "@type": "koral:rewrite",
                 "src": "Kustvakt",
-                "operation": "operation:insertion",
+                "operation": "operation:injection",
                 "scope": "availability(FREE)"
             }
         ]