diff --git a/api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/Annotation.java b/api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/Annotation.java
index f7e2ae47..0404c174 100644
--- a/api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/Annotation.java
+++ b/api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/Annotation.java
@@ -38,5 +38,5 @@ default Collection<KeywordCategory> categories() {
         return Set.of(KeywordCategory.ANNOTATION);
     }
 
-    JsonValue value();
+    JsonValue valueFor(JsonValue value);
 }
diff --git a/api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/DefaultAnnotation.java b/api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/StaticAnnotation.java
similarity index 90%
rename from api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/DefaultAnnotation.java
rename to api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/StaticAnnotation.java
index 52ba76c3..fa8b7559 100644
--- a/api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/DefaultAnnotation.java
+++ b/api/src/main/java/io/github/sebastiantoepfer/jsonschema/keyword/StaticAnnotation.java
@@ -32,12 +32,12 @@
  *
  * see: https://json-schema.org/draft/2020-12/json-schema-core.html#name-json-schema-objects-and-key
  */
-public final class DefaultAnnotation implements Annotation {
+public final class StaticAnnotation implements Annotation {
 
     private final String name;
     private final JsonValue value;
 
-    public DefaultAnnotation(final String name, final JsonValue value) {
+    public StaticAnnotation(final String name, final JsonValue value) {
         this.name = Objects.requireNonNull(name);
         this.value = Objects.requireNonNullElse(value, JsonValue.NULL);
     }
@@ -48,7 +48,7 @@ public boolean hasName(final String name) {
     }
 
     @Override
-    public JsonValue value() {
+    public JsonValue valueFor(final JsonValue instance) {
         return value;
     }
 }
diff --git a/api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/AnnotationTest.java b/api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/AnnotationTest.java
index a1998142..c9479d12 100644
--- a/api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/AnnotationTest.java
+++ b/api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/AnnotationTest.java
@@ -52,7 +52,7 @@ void should_return_this_as_annotation() {
     private static class TestAnnotation implements Annotation {
 
         @Override
-        public JsonValue value() {
+        public JsonValue valueFor(JsonValue value) {
             throw new UnsupportedOperationException("Not supported yet.");
         }
 
diff --git a/api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/DefaultAnnotationTest.java b/api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/StaticAnnotationTest.java
similarity index 77%
rename from api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/DefaultAnnotationTest.java
rename to api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/StaticAnnotationTest.java
index 775cbb66..89206c70 100644
--- a/api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/DefaultAnnotationTest.java
+++ b/api/src/test/java/io/github/sebastiantoepfer/jsonschema/keyword/StaticAnnotationTest.java
@@ -27,22 +27,26 @@
 import static org.hamcrest.Matchers.is;
 
 import jakarta.json.Json;
+import jakarta.json.JsonValue;
 import org.junit.jupiter.api.Test;
 
-class DefaultAnnotationTest {
+class StaticAnnotationTest {
 
     @Test
     void should_know_his_name() {
-        assertThat(new DefaultAnnotation("myname", Json.createValue("string")).hasName("myname"), is(true));
+        assertThat(new StaticAnnotation("myname", Json.createValue("string")).hasName("myname"), is(true));
     }
 
     @Test
     void should_know_other_names() {
-        assertThat(new DefaultAnnotation("myname", Json.createValue("string")).hasName("id"), is(false));
+        assertThat(new StaticAnnotation("myname", Json.createValue("string")).hasName("id"), is(false));
     }
 
     @Test
     void should_return_his_value() {
-        assertThat(new DefaultAnnotation("myname", Json.createValue("string")).value(), is(Json.createValue("string")));
+        assertThat(
+            new StaticAnnotation("myname", Json.createValue("string")).valueFor(JsonValue.FALSE),
+            is(Json.createValue("string"))
+        );
     }
 }
diff --git a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/UnknowKeywordType.java b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/UnknowKeywordType.java
index a23d3541..26d02923 100644
--- a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/UnknowKeywordType.java
+++ b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/UnknowKeywordType.java
@@ -24,9 +24,9 @@
 package io.github.sebastiantoepfer.jsonschema.core;
 
 import io.github.sebastiantoepfer.jsonschema.JsonSchema;
-import io.github.sebastiantoepfer.jsonschema.keyword.DefaultAnnotation;
 import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
 import io.github.sebastiantoepfer.jsonschema.keyword.KeywordType;
+import io.github.sebastiantoepfer.jsonschema.keyword.StaticAnnotation;
 import jakarta.json.JsonValue;
 import java.util.Objects;
 
@@ -45,6 +45,6 @@ public String name() {
 
     @Override
     public Keyword createKeyword(final JsonSchema schema, final JsonValue value) {
-        return new DefaultAnnotation(name(), value);
+        return new StaticAnnotation(name(), value);
     }
 }
diff --git a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ItemsKeywordType.java b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ItemsKeywordType.java
index 7635198b..cf404f16 100644
--- a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ItemsKeywordType.java
+++ b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ItemsKeywordType.java
@@ -93,9 +93,9 @@ public Collection<KeywordCategory> categories() {
         }
 
         @Override
-        public JsonValue value() {
+        public JsonValue valueFor(final JsonValue value) {
             final JsonValue result;
-            if (appliesToAny()) {
+            if (appliesToAnyFor(value.asJsonArray())) {
                 result = JsonValue.TRUE;
             } else {
                 result = JsonValue.FALSE;
@@ -103,8 +103,8 @@ public JsonValue value() {
             return result;
         }
 
-        private boolean appliesToAny() {
-            return startIndex() < 0;
+        private boolean appliesToAnyFor(final JsonArray value) {
+            return startIndexFor(value) == -1;
         }
 
         @Override
@@ -114,18 +114,42 @@ public boolean applyTo(final JsonValue instance) {
 
         private boolean matchesSchema(final JsonArray items) {
             final Validator itemValidator = validator();
-            return items.stream().skip(startIndex() + 1).map(itemValidator::validate).allMatch(Collection::isEmpty);
+            return items
+                .stream()
+                .skip(startIndexFor(items) + 1L)
+                .map(itemValidator::validate)
+                .allMatch(Collection::isEmpty);
         }
 
-        private long startIndex() {
+        private int startIndexFor(final JsonArray value) {
             return owner()
                 .keywordByName("prefixItems")
                 .map(Keyword::asAnnotation)
-                .map(Annotation::value)
-                .filter(InstanceType.INTEGER::isInstance)
-                .map(JsonNumber.class::cast)
-                .map(JsonNumber::longValue)
-                .orElse(-1L);
+                .map(anno -> anno.valueFor(value))
+                .map(v -> new MaxIndexCalculator(value, v))
+                .map(MaxIndexCalculator::maxIndex)
+                .orElse(-1);
+        }
+
+        private static class MaxIndexCalculator {
+
+            private final JsonArray array;
+            private final JsonValue index;
+
+            public MaxIndexCalculator(final JsonArray array, final JsonValue index) {
+                this.array = array;
+                this.index = index;
+            }
+
+            int maxIndex() {
+                final int result;
+                if (index == JsonValue.TRUE) {
+                    result = array.size();
+                } else {
+                    result = ((JsonNumber) index).intValue();
+                }
+                return result;
+            }
         }
     }
 }
diff --git a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PrefixItemsKeywordType.java b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PrefixItemsKeywordType.java
index 303e752c..fcb028c9 100644
--- a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PrefixItemsKeywordType.java
+++ b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PrefixItemsKeywordType.java
@@ -76,8 +76,14 @@ public boolean hasName(final String name) {
         }
 
         @Override
-        public JsonValue value() {
-            return Json.createValue(schemas.size() - 1);
+        public JsonValue valueFor(final JsonValue value) {
+            final JsonValue result;
+            if (value.asJsonArray().size() == schemas.size()) {
+                result = JsonValue.TRUE;
+            } else {
+                result = Json.createValue(Math.min(value.asJsonArray().size(), schemas.size()) - 1);
+            }
+            return result;
         }
 
         @Override
diff --git a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/core/CommentKeywordType.java b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/core/CommentKeywordType.java
index bcace34a..ce060338 100644
--- a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/core/CommentKeywordType.java
+++ b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/core/CommentKeywordType.java
@@ -24,9 +24,9 @@
 package io.github.sebastiantoepfer.jsonschema.core.vocab.core;
 
 import io.github.sebastiantoepfer.jsonschema.JsonSchema;
-import io.github.sebastiantoepfer.jsonschema.keyword.DefaultAnnotation;
 import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
 import io.github.sebastiantoepfer.jsonschema.keyword.KeywordType;
+import io.github.sebastiantoepfer.jsonschema.keyword.StaticAnnotation;
 import jakarta.json.JsonValue;
 
 /**
@@ -42,6 +42,6 @@ public String name() {
 
     @Override
     public Keyword createKeyword(final JsonSchema schema, final JsonValue value) {
-        return new DefaultAnnotation(name(), value);
+        return new StaticAnnotation(name(), value);
     }
 }
diff --git a/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ItemsKeywordTypeTest.java b/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ItemsKeywordTypeTest.java
index c224d091..af44eb12 100644
--- a/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ItemsKeywordTypeTest.java
+++ b/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ItemsKeywordTypeTest.java
@@ -114,7 +114,7 @@ void should_produces_true_if_is_applied_to_any_instance() {
             new ItemsKeywordType()
                 .createKeyword(new DefaultJsonSchemaFactory().create(JsonValue.TRUE), JsonValue.EMPTY_JSON_OBJECT)
                 .asAnnotation()
-                .value(),
+                .valueFor(Json.createArrayBuilder().add(1).build()),
             is(JsonValue.TRUE)
         );
     }
@@ -155,7 +155,7 @@ void should_return_false_if_not_applies_to_any_item() {
                     JsonValue.FALSE
                 )
                 .asAnnotation()
-                .value(),
+                .valueFor(Json.createArrayBuilder().add(1).build()),
             is(JsonValue.FALSE)
         );
     }
@@ -167,12 +167,15 @@ void should_be_valid_if_invaliditem_is_already_checked_by_prefixItems() {
                 .createKeyword(
                     new DefaultJsonSchemaFactory()
                         .create(
-                            Json.createObjectBuilder().add("prefixItems", Json.createArrayBuilder().add(true)).build()
+                            Json
+                                .createObjectBuilder()
+                                .add("prefixItems", Json.createArrayBuilder().add(true).add(true))
+                                .build()
                         ),
-                    JsonValue.FALSE
+                    Json.createObjectBuilder().add("type", "integer").build()
                 )
                 .asApplicator()
-                .applyTo(Json.createArrayBuilder().add("1").build()),
+                .applyTo(Json.createArrayBuilder().add("1").add("2").add(1).build()),
             is(true)
         );
     }
@@ -186,10 +189,10 @@ void should_be_invalid_if_invaliditem_is_not_already_checked_by_prefixItems() {
                         .create(
                             Json.createObjectBuilder().add("prefixItems", Json.createArrayBuilder().add(true)).build()
                         ),
-                    JsonValue.FALSE
+                    Json.createObjectBuilder().add("type", "integer").build()
                 )
                 .asApplicator()
-                .applyTo(Json.createArrayBuilder().add("1").add("2").build()),
+                .applyTo(Json.createArrayBuilder().add("1").add("2").add(1).build()),
             is(false)
         );
     }
diff --git a/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PrefixItemsKeywordTypeTest.java b/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PrefixItemsKeywordTypeTest.java
index c1c2855f..4dc81dfd 100644
--- a/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PrefixItemsKeywordTypeTest.java
+++ b/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/PrefixItemsKeywordTypeTest.java
@@ -62,7 +62,7 @@ void should_not_be_createbale_from_non_array() {
     }
 
     @Test
-    void should_return_one_as_value() {
+    void should_return_zero_as_value() {
         assertThat(
             new PrefixItemsKeywordType()
                 .createKeyword(
@@ -70,11 +70,25 @@ void should_return_one_as_value() {
                     Json.createArrayBuilder().add(JsonValue.TRUE).build()
                 )
                 .asAnnotation()
-                .value(),
+                .valueFor(Json.createArrayBuilder().add(1).add(2).build()),
             is(Json.createValue(0))
         );
     }
 
+    @Test
+    void should_retrun_true_if_is_applies_to_all_values() {
+        assertThat(
+            new PrefixItemsKeywordType()
+                .createKeyword(
+                    new DefaultJsonSchemaFactory().create(JsonValue.TRUE),
+                    Json.createArrayBuilder().add(JsonValue.TRUE).add(JsonValue.TRUE).build()
+                )
+                .asAnnotation()
+                .valueFor(Json.createArrayBuilder().add(1).add(2).build()),
+            is(JsonValue.TRUE)
+        );
+    }
+
     @Test
     void should_be_valid_for_non_arrays() {
         assertThat(