diff --git a/api/src/main/java/io/github/sebastiantoepfer/jsonschema/JsonSchema.java b/api/src/main/java/io/github/sebastiantoepfer/jsonschema/JsonSchema.java
index 98ffbcb4..5d559418 100644
--- a/api/src/main/java/io/github/sebastiantoepfer/jsonschema/JsonSchema.java
+++ b/api/src/main/java/io/github/sebastiantoepfer/jsonschema/JsonSchema.java
@@ -23,8 +23,12 @@
  */
 package io.github.sebastiantoepfer.jsonschema;
 
+import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
 import jakarta.json.JsonValue;
+import java.util.Optional;
 
 public interface JsonSchema extends JsonValue {
     public Validator validator();
+
+    Optional<Keyword> keywordByName(String name);
 }
diff --git a/api/src/test/java/io/github/sebastiantoepfer/jsonschema/FakeJsonSchemaFactory.java b/api/src/test/java/io/github/sebastiantoepfer/jsonschema/FakeJsonSchemaFactory.java
index c294fd20..f909b7ae 100644
--- a/api/src/test/java/io/github/sebastiantoepfer/jsonschema/FakeJsonSchemaFactory.java
+++ b/api/src/test/java/io/github/sebastiantoepfer/jsonschema/FakeJsonSchemaFactory.java
@@ -23,8 +23,10 @@
  */
 package io.github.sebastiantoepfer.jsonschema;
 
+import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
 import io.github.sebastiantoepfer.jsonschema.spi.JsonSchemaFactory;
 import jakarta.json.JsonValue;
+import java.util.Optional;
 
 public final class FakeJsonSchemaFactory implements JsonSchemaFactory {
 
@@ -40,6 +42,11 @@ public Validator validator() {
             public JsonValue.ValueType getValueType() {
                 throw new UnsupportedOperationException("Not supported yet.");
             }
+
+            @Override
+            public Optional<Keyword> keywordByName(String name) {
+                throw new UnsupportedOperationException("Not supported yet.");
+            }
         };
     }
 }
diff --git a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/DefaultJsonSchema.java b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/DefaultJsonSchema.java
index b211f356..8160a61f 100644
--- a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/DefaultJsonSchema.java
+++ b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/DefaultJsonSchema.java
@@ -40,9 +40,9 @@
 import jakarta.json.JsonValue;
 import java.util.Collection;
 import java.util.List;
-import java.util.Map.Entry;
 import java.util.Objects;
 import java.util.Optional;
+import java.util.stream.Stream;
 
 final class DefaultJsonSchema extends AbstractJsonValueSchema {
 
@@ -55,9 +55,7 @@ public DefaultJsonSchema(final JsonObject value) {
 
     @Override
     public Validator validator() {
-        return asJsonObject()
-            .entrySet()
-            .stream()
+        return keywords()
             .map(this::asContraint)
             .flatMap(Optional::stream)
             .collect(
@@ -65,6 +63,11 @@ public Validator validator() {
             );
     }
 
+    @Override
+    public Optional<Keyword> keywordByName(final String name) {
+        return keywords().filter(k -> k.hasName(name)).findFirst();
+    }
+
     private Collection<VocabularyDefinition> vocabulary() {
         return new KeywordSearch(new VocabularyKeywordType())
             .searchForKeywordIn(this)
@@ -75,8 +78,11 @@ private Collection<VocabularyDefinition> vocabulary() {
             .toList();
     }
 
-    private Optional<Constraint<JsonValue>> asContraint(final Entry<String, JsonValue> property) {
-        final Keyword keyword = keywords.createKeywordFor(this, property);
+    private Stream<Keyword> keywords() {
+        return asJsonObject().entrySet().stream().map(property -> keywords.createKeywordFor(this, property));
+    }
+
+    private Optional<Constraint<JsonValue>> asContraint(final Keyword keyword) {
         final Constraint<JsonValue> result;
         if (keyword.hasCategory(Keyword.KeywordCategory.ASSERTION)) {
             result = new AssertionConstraint(keyword.asAssertion());
diff --git a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/EmptyJsonSchema.java b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/EmptyJsonSchema.java
index 17a2e73b..59d4a79b 100644
--- a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/EmptyJsonSchema.java
+++ b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/EmptyJsonSchema.java
@@ -25,7 +25,9 @@
 
 import io.github.sebastiantoepfer.jsonschema.Validator;
 import io.github.sebastiantoepfer.jsonschema.core.constraint.NoConstraint;
+import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
 import jakarta.json.JsonValue;
+import java.util.Optional;
 
 final class EmptyJsonSchema extends AbstractJsonValueSchema {
 
@@ -37,4 +39,9 @@ public EmptyJsonSchema() {
     public Validator validator() {
         return new DefaultValidator(new NoConstraint<>());
     }
+
+    @Override
+    public Optional<Keyword> keywordByName(final String name) {
+        return Optional.empty();
+    }
 }
diff --git a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/FalseJsonSchema.java b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/FalseJsonSchema.java
index eee71fe6..42b46b2c 100644
--- a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/FalseJsonSchema.java
+++ b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/FalseJsonSchema.java
@@ -25,7 +25,9 @@
 
 import io.github.sebastiantoepfer.jsonschema.Validator;
 import io.github.sebastiantoepfer.jsonschema.core.constraint.UnfulfillableConstraint;
+import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
 import jakarta.json.JsonValue;
+import java.util.Optional;
 
 final class FalseJsonSchema extends AbstractJsonValueSchema {
 
@@ -37,4 +39,9 @@ public FalseJsonSchema() {
     public Validator validator() {
         return new DefaultValidator(new UnfulfillableConstraint<>());
     }
+
+    @Override
+    public Optional<Keyword> keywordByName(final String name) {
+        return Optional.empty();
+    }
 }
diff --git a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/TrueJsonSchema.java b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/TrueJsonSchema.java
index 8cc4b777..525f2154 100644
--- a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/TrueJsonSchema.java
+++ b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/TrueJsonSchema.java
@@ -25,7 +25,9 @@
 
 import io.github.sebastiantoepfer.jsonschema.Validator;
 import io.github.sebastiantoepfer.jsonschema.core.constraint.NoConstraint;
+import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
 import jakarta.json.JsonValue;
+import java.util.Optional;
 
 final class TrueJsonSchema extends AbstractJsonValueSchema {
 
@@ -37,4 +39,9 @@ public TrueJsonSchema() {
     public Validator validator() {
         return new DefaultValidator(new NoConstraint<>());
     }
+
+    @Override
+    public Optional<Keyword> keywordByName(final String name) {
+        return Optional.empty();
+    }
 }
diff --git a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ApplicatorVocabulary.java b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ApplicatorVocabulary.java
index ff10d6ee..856aad95 100644
--- a/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ApplicatorVocabulary.java
+++ b/core/src/main/java/io/github/sebastiantoepfer/jsonschema/core/vocab/applicator/ApplicatorVocabulary.java
@@ -37,6 +37,7 @@ public ApplicatorVocabulary() {
         this.vocab =
             new DefaultVocabulary(
                 URI.create("https://json-schema.org/draft/2020-12/vocab/applicator"),
+                new PrefixItemsKeywordType(),
                 new ItemsKeywordType()
             );
     }
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 52b1a360..7635198b 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
@@ -33,10 +33,12 @@
 import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
 import io.github.sebastiantoepfer.jsonschema.keyword.KeywordType;
 import jakarta.json.JsonArray;
+import jakarta.json.JsonNumber;
 import jakarta.json.JsonValue;
 import java.util.Collection;
 import java.util.List;
 import java.util.Objects;
+import java.util.Optional;
 
 final class ItemsKeywordType implements KeywordType {
 
@@ -75,6 +77,11 @@ public ValueType getValueType() {
             return schema.getValueType();
         }
 
+        @Override
+        public Optional<Keyword> keywordByName(final String name) {
+            return schema.keywordByName(name);
+        }
+
         @Override
         public boolean hasName(final String name) {
             return Objects.equals(name(), name);
@@ -87,7 +94,17 @@ public Collection<KeywordCategory> categories() {
 
         @Override
         public JsonValue value() {
-            return JsonValue.TRUE;
+            final JsonValue result;
+            if (appliesToAny()) {
+                result = JsonValue.TRUE;
+            } else {
+                result = JsonValue.FALSE;
+            }
+            return result;
+        }
+
+        private boolean appliesToAny() {
+            return startIndex() < 0;
         }
 
         @Override
@@ -97,7 +114,18 @@ public boolean applyTo(final JsonValue instance) {
 
         private boolean matchesSchema(final JsonArray items) {
             final Validator itemValidator = validator();
-            return items.stream().map(itemValidator::validate).allMatch(Collection::isEmpty);
+            return items.stream().skip(startIndex() + 1).map(itemValidator::validate).allMatch(Collection::isEmpty);
+        }
+
+        private long startIndex() {
+            return owner()
+                .keywordByName("prefixItems")
+                .map(Keyword::asAnnotation)
+                .map(Annotation::value)
+                .filter(InstanceType.INTEGER::isInstance)
+                .map(JsonNumber.class::cast)
+                .map(JsonNumber::longValue)
+                .orElse(-1L);
         }
     }
 }
diff --git a/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/AbstractJsonValueSchemaTest.java b/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/AbstractJsonValueSchemaTest.java
index b660641b..e8744b8c 100644
--- a/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/AbstractJsonValueSchemaTest.java
+++ b/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/AbstractJsonValueSchemaTest.java
@@ -28,9 +28,11 @@
 import static org.hamcrest.Matchers.is;
 
 import io.github.sebastiantoepfer.jsonschema.Validator;
+import io.github.sebastiantoepfer.jsonschema.keyword.Keyword;
 import jakarta.json.JsonArray;
 import jakarta.json.JsonObject;
 import jakarta.json.JsonValue;
+import java.util.Optional;
 import org.junit.jupiter.api.Test;
 
 class AbstractJsonValueSchemaTest {
@@ -65,5 +67,10 @@ public MyJsonValueSchema(JsonValue value) {
         public Validator validator() {
             throw new UnsupportedOperationException("Not supported yet.");
         }
+
+        @Override
+        public Optional<Keyword> keywordByName(final String name) {
+            return Optional.empty();
+        }
     }
 }
diff --git a/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/DefaultJsonSchemaTest.java b/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/DefaultJsonSchemaTest.java
index cd2ec22d..8dec8483 100644
--- a/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/DefaultJsonSchemaTest.java
+++ b/core/src/test/java/io/github/sebastiantoepfer/jsonschema/core/DefaultJsonSchemaTest.java
@@ -23,6 +23,8 @@
  */
 package io.github.sebastiantoepfer.jsonschema.core;
 
+import static com.github.npathai.hamcrestopt.OptionalMatchers.isEmpty;
+import static com.github.npathai.hamcrestopt.OptionalMatchers.isPresent;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.is;
@@ -76,4 +78,38 @@ void should_not_be_loadable_without_mandantory_core_vocabulary() {
 
         Assertions.assertThrows(Exception.class, () -> new DefaultJsonSchema(invalidSchema));
     }
+
+    @Test
+    void should_find_keyword_by_name() {
+        assertThat(
+            new DefaultJsonSchema(
+                Json
+                    .createObjectBuilder()
+                    .add(
+                        "$vocabulary",
+                        Json.createObjectBuilder().add("https://json-schema.org/draft/2020-12/vocab/core", true)
+                    )
+                    .build()
+            )
+                .keywordByName("$vocabulary"),
+            isPresent()
+        );
+    }
+
+    @Test
+    void should_return_empty_for_non_existing_keyword() {
+        assertThat(
+            new DefaultJsonSchema(
+                Json
+                    .createObjectBuilder()
+                    .add(
+                        "$vocabulary",
+                        Json.createObjectBuilder().add("https://json-schema.org/draft/2020-12/vocab/core", true)
+                    )
+                    .build()
+            )
+                .keywordByName("type"),
+            isEmpty()
+        );
+    }
 }
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 eca41eea..c224d091 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
@@ -23,6 +23,8 @@
  */
 package io.github.sebastiantoepfer.jsonschema.core.vocab.applicator;
 
+import static com.github.npathai.hamcrestopt.OptionalMatchers.isEmpty;
+import static com.github.npathai.hamcrestopt.OptionalMatchers.isPresent;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.is;
@@ -116,4 +118,79 @@ void should_produces_true_if_is_applied_to_any_instance() {
             is(JsonValue.TRUE)
         );
     }
+
+    @Test
+    void should_find_know_keyword() {
+        assertThat(
+            ((JsonSubSchema) new ItemsKeywordType()
+                    .createKeyword(
+                        new DefaultJsonSchemaFactory().create(JsonValue.TRUE),
+                        Json.createObjectBuilder().add("type", "string").build()
+                    )).keywordByName("type"),
+            isPresent()
+        );
+    }
+
+    @Test
+    void should_retrun_empty_for_non_existing_keyword() {
+        assertThat(
+            ((JsonSubSchema) new ItemsKeywordType()
+                    .createKeyword(
+                        new DefaultJsonSchemaFactory().create(JsonValue.TRUE),
+                        Json.createObjectBuilder().add("type", "string").build()
+                    )).keywordByName("properties"),
+            isEmpty()
+        );
+    }
+
+    @Test
+    void should_return_false_if_not_applies_to_any_item() {
+        assertThat(
+            new ItemsKeywordType()
+                .createKeyword(
+                    new DefaultJsonSchemaFactory()
+                        .create(
+                            Json.createObjectBuilder().add("prefixItems", Json.createArrayBuilder().add(true)).build()
+                        ),
+                    JsonValue.FALSE
+                )
+                .asAnnotation()
+                .value(),
+            is(JsonValue.FALSE)
+        );
+    }
+
+    @Test
+    void should_be_valid_if_invaliditem_is_already_checked_by_prefixItems() {
+        assertThat(
+            new ItemsKeywordType()
+                .createKeyword(
+                    new DefaultJsonSchemaFactory()
+                        .create(
+                            Json.createObjectBuilder().add("prefixItems", Json.createArrayBuilder().add(true)).build()
+                        ),
+                    JsonValue.FALSE
+                )
+                .asApplicator()
+                .applyTo(Json.createArrayBuilder().add("1").build()),
+            is(true)
+        );
+    }
+
+    @Test
+    void should_be_invalid_if_invaliditem_is_not_already_checked_by_prefixItems() {
+        assertThat(
+            new ItemsKeywordType()
+                .createKeyword(
+                    new DefaultJsonSchemaFactory()
+                        .create(
+                            Json.createObjectBuilder().add("prefixItems", Json.createArrayBuilder().add(true)).build()
+                        ),
+                    JsonValue.FALSE
+                )
+                .asApplicator()
+                .applyTo(Json.createArrayBuilder().add("1").add("2").build()),
+            is(false)
+        );
+    }
 }