diff --git a/artifacts/src/main/resources/presentation/presentation-query-message-schema.json b/artifacts/src/main/resources/presentation/presentation-query-message-schema.json
index 99c38e6..d5ab541 100644
--- a/artifacts/src/main/resources/presentation/presentation-query-message-schema.json
+++ b/artifacts/src/main/resources/presentation/presentation-query-message-schema.json
@@ -14,41 +14,65 @@
       "properties": {
         "@context": {
           "$ref": "https://w3id.org/dspace-dcp/v0.8/common/context-schema.json"
-        },
-        "scope": {
-          "type": "array",
-          "items": {
-            "type": "string"
-          }
         }
       },
-      "oneOf": [
+      "allOf": [
         {
-          "properties": {
-            "@type": {
-              "type": "string",
-              "const": "PresentationQueryMessage"
+          "oneOf": [
+            {
+              "properties": {
+                "scope": {
+                  "type": "array",
+                  "items": {
+                    "type": "string"
+                  }
+                }
+              },
+              "required": [
+                "scope"
+              ]
+            },
+            {
+              "properties": {
+                "presentationDefinition": {
+                  "type": "object"
+                }
+              },
+              "required": [
+                "presentationDefinition"
+              ]
             }
-          },
-          "required": [
-            "@type"
           ]
         },
         {
-          "properties": {
-            "type": {
-              "type": "string",
-              "const": "PresentationQueryMessage"
+          "oneOf": [
+            {
+              "properties": {
+                "@type": {
+                  "type": "string",
+                  "const": "PresentationQueryMessage"
+                }
+              },
+              "required": [
+                "@type"
+              ]
+            },
+            {
+              "properties": {
+                "type": {
+                  "type": "string",
+                  "const": "PresentationQueryMessage"
+                }
+              },
+              "required": [
+                "type"
+              ]
             }
-          },
-          "required": [
-            "type"
           ]
         }
       ],
       "required": [
-        "@context",
-        "scope"
+        "@context"
       ]
     }
   }
diff --git a/artifacts/src/test/java/org/eclipse/dcp/schema/presentation/PresentationQueryMessageSchemaTest.java b/artifacts/src/test/java/org/eclipse/dcp/schema/presentation/PresentationQueryMessageSchemaTest.java
index f6f96dc..0437ecd 100644
--- a/artifacts/src/test/java/org/eclipse/dcp/schema/presentation/PresentationQueryMessageSchemaTest.java
+++ b/artifacts/src/test/java/org/eclipse/dcp/schema/presentation/PresentationQueryMessageSchemaTest.java
@@ -30,6 +30,13 @@ public class PresentationQueryMessageSchemaTest extends AbstractSchemaTest {
               "scope": ["scope1", "scope2"]
             }""";
 
+    private static final String PRESENTATION_QUERY_MESSAGE_WITH_PRESENTATION_DEF = """
+            {
+              "@context": ["https://w3id.org/dspace-dcp/v0.8"],
+              "@type": "PresentationQueryMessage",
+              "presentationDefinition": {}
+            }""";
+
     private static final String INVALID_PRESENTATION_QUERY_MESSAGE_NO_SCOPE = """
             {
               "@context": ["https://w3id.org/dspace-dcp/v0.8"],
@@ -45,10 +52,13 @@ public class PresentationQueryMessageSchemaTest extends AbstractSchemaTest {
     @Test
     void verifySchema() {
         assertThat(schema.validate(PRESENTATION_QUERY_MESSAGE, JSON)).isEmpty();
+        assertThat(schema.validate(PRESENTATION_QUERY_MESSAGE_WITH_PRESENTATION_DEF, JSON)).isEmpty();
 
         assertThat(schema.validate(INVALID_PRESENTATION_QUERY_MESSAGE_NO_SCOPE, JSON))
                 .extracting(this::errorExtractor)
-                .containsExactly(error("scope", REQUIRED));
+                .contains(error("scope", REQUIRED), error("presentationDefinition", REQUIRED));
+
+
         assertThat(schema.validate(INVALID_PRESENTATION_QUERY_MESSAGE_NO_TYPE_AND_CONTEXT, JSON))
                 .hasSize(4)
                 .extracting(this::errorExtractor)