diff --git a/hapi-fhir-jpaserver-searchparam/src/main/java/ca/uhn/fhir/jpa/searchparam/extractor/SearchParamExtractorR4.java b/hapi-fhir-jpaserver-searchparam/src/main/java/ca/uhn/fhir/jpa/searchparam/extractor/SearchParamExtractorR4.java
index ebddca35be0..2a2503789cb 100644
--- a/hapi-fhir-jpaserver-searchparam/src/main/java/ca/uhn/fhir/jpa/searchparam/extractor/SearchParamExtractorR4.java
+++ b/hapi-fhir-jpaserver-searchparam/src/main/java/ca/uhn/fhir/jpa/searchparam/extractor/SearchParamExtractorR4.java
@@ -208,5 +208,10 @@ public class SearchParamExtractorR4 extends BaseSearchParamExtractor implements
 		public ValueSet resolveValueSet(FHIRPathEngine engine, Object appContext, String url) {
 			return null;
 		}
+
+		@Override
+		public boolean paramIsType(String name, int index) {
+			return false;
+		}
 	}
 }
diff --git a/hapi-fhir-jpaserver-test-utilities/src/main/java/ca/uhn/fhir/jpa/test/BaseJpaR4Test.java b/hapi-fhir-jpaserver-test-utilities/src/main/java/ca/uhn/fhir/jpa/test/BaseJpaR4Test.java
index f379ee2cf0a..a6ac95966dc 100644
--- a/hapi-fhir-jpaserver-test-utilities/src/main/java/ca/uhn/fhir/jpa/test/BaseJpaR4Test.java
+++ b/hapi-fhir-jpaserver-test-utilities/src/main/java/ca/uhn/fhir/jpa/test/BaseJpaR4Test.java
@@ -196,6 +196,7 @@ import org.hl7.fhir.r5.utils.validation.constants.BindingKind;
 import org.hl7.fhir.r5.utils.validation.constants.ContainedReferenceValidationPolicy;
 import org.hl7.fhir.r5.utils.validation.constants.ReferenceValidationPolicy;
 import org.hl7.fhir.utilities.validation.ValidationMessage;
+import org.hl7.fhir.validation.instance.advisor.BasePolicyAdvisorForFullValidation;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Order;
@@ -1075,6 +1076,18 @@ public abstract class BaseJpaR4Test extends BaseJpaTest implements ITestDataBuil
 		public ReferenceValidationPolicy getReferencePolicy() {
 			return ReferenceValidationPolicy.IGNORE;
 		}
+
+		@Override
+		public IValidationPolicyAdvisor getPolicyAdvisor() {
+			return new BasePolicyAdvisorForFullValidation(getReferencePolicy());
+		}
+
+		@Override
+		public IValidationPolicyAdvisor setPolicyAdvisor(IValidationPolicyAdvisor policyAdvisor) {
+			return null;
+		}
+
+
 	}
 
 
diff --git a/hapi-fhir-storage/src/main/java/ca/uhn/fhir/jpa/validation/ValidatorPolicyAdvisor.java b/hapi-fhir-storage/src/main/java/ca/uhn/fhir/jpa/validation/ValidatorPolicyAdvisor.java
index 7c6f7204e7a..691fb12af91 100644
--- a/hapi-fhir-storage/src/main/java/ca/uhn/fhir/jpa/validation/ValidatorPolicyAdvisor.java
+++ b/hapi-fhir-storage/src/main/java/ca/uhn/fhir/jpa/validation/ValidatorPolicyAdvisor.java
@@ -31,6 +31,7 @@ import org.hl7.fhir.r5.utils.validation.constants.BindingKind;
 import org.hl7.fhir.r5.utils.validation.constants.ContainedReferenceValidationPolicy;
 import org.hl7.fhir.r5.utils.validation.constants.ReferenceValidationPolicy;
 import org.hl7.fhir.utilities.validation.ValidationMessage;
+import org.hl7.fhir.validation.instance.advisor.BasePolicyAdvisorForFullValidation;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -123,6 +124,16 @@ public class ValidatorPolicyAdvisor implements IValidationPolicyAdvisor {
 		return false;
 	}
 
+	@Override
+	public IValidationPolicyAdvisor getPolicyAdvisor() {
+		return new BasePolicyAdvisorForFullValidation(getReferencePolicy());
+	}
+
+	@Override
+	public IValidationPolicyAdvisor setPolicyAdvisor(IValidationPolicyAdvisor policyAdvisor) {
+		return null;
+	}
+
 	@Override
 	public ReferenceValidationPolicy getReferencePolicy() {
 		return ReferenceValidationPolicy.IGNORE;
diff --git a/hapi-fhir-storage/src/test/java/ca/uhn/fhir/jpa/validation/ValidatorResourceFetcherTest.java b/hapi-fhir-storage/src/test/java/ca/uhn/fhir/jpa/validation/ValidatorResourceFetcherTest.java
index fb0d9c4ab5c..b8dd6956360 100644
--- a/hapi-fhir-storage/src/test/java/ca/uhn/fhir/jpa/validation/ValidatorResourceFetcherTest.java
+++ b/hapi-fhir-storage/src/test/java/ca/uhn/fhir/jpa/validation/ValidatorResourceFetcherTest.java
@@ -15,6 +15,7 @@ import org.hl7.fhir.common.hapi.validation.validator.VersionSpecificWorkerContex
 import org.hl7.fhir.instance.model.api.IBaseResource;
 import org.hl7.fhir.r5.elementmodel.Element;
 import org.hl7.fhir.r5.utils.XVerExtensionManager;
+import org.hl7.fhir.r5.utils.validation.ValidatorSession;
 import org.hl7.fhir.validation.instance.InstanceValidator;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -56,7 +57,7 @@ public class ValidatorResourceFetcherTest extends BaseTest {
     InstanceValidator v = new InstanceValidator(
       wrappedWorkerContext,
       new FhirInstanceValidator.NullEvaluationContext(),
-      new XVerExtensionManager(null));
+      new XVerExtensionManager(null), new ValidatorSession());
     RequestDetails r = new SystemRequestDetails();
     // test
     Element returnedResource = fetcher.fetch(v, r,"http://www.test-url-for-questionnaire.com/Questionnaire/test-id|1.0.0");
diff --git a/hapi-fhir-structures-r4/src/main/java/org/hl7/fhir/r4/hapi/ctx/HapiWorkerContext.java b/hapi-fhir-structures-r4/src/main/java/org/hl7/fhir/r4/hapi/ctx/HapiWorkerContext.java
index 436338c8443..f295ca21a3f 100644
--- a/hapi-fhir-structures-r4/src/main/java/org/hl7/fhir/r4/hapi/ctx/HapiWorkerContext.java
+++ b/hapi-fhir-structures-r4/src/main/java/org/hl7/fhir/r4/hapi/ctx/HapiWorkerContext.java
@@ -449,6 +449,26 @@ public final class HapiWorkerContext extends I18nBase implements IWorkerContext
 		return retVal;
 	}
 
+	public <T extends Resource> List<T> fetchResourcesByType(Class<T> theClass) {
+
+		return null;
+	}
+
+	public <T extends Resource> T fetchResource(Class<T> class_, String uri, Resource source) {
+		return fetchResource(class_, uri);
+	}
+
+	@Override
+	public List<StructureDefinition> fetchTypeDefinitions(String n) {
+		List<StructureDefinition> types = new ArrayList<>();
+		for (StructureDefinition sd : allStructures()) {
+			if (n.equals(sd.getTypeTail())) {
+				types.add(sd);
+			}
+		}
+		return types;
+	}
+
 	@Override
 	public org.hl7.fhir.r4.model.Resource fetchResourceById(String theType, String theUri) {
 		throw new UnsupportedOperationException(Msg.code(282));
diff --git a/hapi-fhir-structures-r4/src/main/java/org/hl7/fhir/r4/hapi/fluentpath/FhirPathR4.java b/hapi-fhir-structures-r4/src/main/java/org/hl7/fhir/r4/hapi/fluentpath/FhirPathR4.java
index 2c04412d4b8..e7fd0f36fe5 100644
--- a/hapi-fhir-structures-r4/src/main/java/org/hl7/fhir/r4/hapi/fluentpath/FhirPathR4.java
+++ b/hapi-fhir-structures-r4/src/main/java/org/hl7/fhir/r4/hapi/fluentpath/FhirPathR4.java
@@ -158,6 +158,11 @@ public class FhirPathR4 implements IFhirPath {
 			public ValueSet resolveValueSet(FHIRPathEngine engine, Object appContext, String url) {
 				return null;
 			}
+
+			@Override
+			public boolean paramIsType(String name, int index) {
+				return false;
+			}
 		});
 	}
 
diff --git a/hapi-fhir-validation/src/main/java/org/hl7/fhir/common/hapi/validation/validator/FhirDefaultPolicyAdvisor.java b/hapi-fhir-validation/src/main/java/org/hl7/fhir/common/hapi/validation/validator/FhirDefaultPolicyAdvisor.java
index 83e97cf9572..6026de3cd63 100644
--- a/hapi-fhir-validation/src/main/java/org/hl7/fhir/common/hapi/validation/validator/FhirDefaultPolicyAdvisor.java
+++ b/hapi-fhir-validation/src/main/java/org/hl7/fhir/common/hapi/validation/validator/FhirDefaultPolicyAdvisor.java
@@ -11,6 +11,7 @@ import org.hl7.fhir.r5.utils.validation.constants.BindingKind;
 import org.hl7.fhir.r5.utils.validation.constants.ContainedReferenceValidationPolicy;
 import org.hl7.fhir.r5.utils.validation.constants.ReferenceValidationPolicy;
 import org.hl7.fhir.utilities.validation.ValidationMessage;
+import org.hl7.fhir.validation.instance.advisor.BasePolicyAdvisorForFullValidation;
 
 import java.util.Arrays;
 import java.util.EnumSet;
@@ -91,6 +92,16 @@ public class FhirDefaultPolicyAdvisor implements IValidationPolicyAdvisor {
 		return false;
 	}
 
+	@Override
+	public IValidationPolicyAdvisor getPolicyAdvisor() {
+		return new BasePolicyAdvisorForFullValidation(getReferencePolicy());
+	}
+
+	@Override
+	public IValidationPolicyAdvisor setPolicyAdvisor(IValidationPolicyAdvisor policyAdvisor) {
+		return null;
+	}
+
 	@Override
 	public ReferenceValidationPolicy getReferencePolicy() {
 		return ReferenceValidationPolicy.IGNORE;
diff --git a/hapi-fhir-validation/src/main/java/org/hl7/fhir/common/hapi/validation/validator/ValidatorWrapper.java b/hapi-fhir-validation/src/main/java/org/hl7/fhir/common/hapi/validation/validator/ValidatorWrapper.java
index ac383cc3ca7..37af069ff4f 100644
--- a/hapi-fhir-validation/src/main/java/org/hl7/fhir/common/hapi/validation/validator/ValidatorWrapper.java
+++ b/hapi-fhir-validation/src/main/java/org/hl7/fhir/common/hapi/validation/validator/ValidatorWrapper.java
@@ -19,6 +19,7 @@ import org.hl7.fhir.r5.model.StructureDefinition;
 import org.hl7.fhir.r5.utils.XVerExtensionManager;
 import org.hl7.fhir.r5.utils.validation.IValidationPolicyAdvisor;
 import org.hl7.fhir.r5.utils.validation.IValidatorResourceFetcher;
+import org.hl7.fhir.r5.utils.validation.ValidatorSession;
 import org.hl7.fhir.r5.utils.validation.constants.BestPracticeWarningLevel;
 import org.hl7.fhir.r5.utils.validation.constants.IdStatus;
 import org.hl7.fhir.utilities.i18n.I18nConstants;
@@ -119,7 +120,7 @@ class ValidatorWrapper {
 		FHIRPathEngine.IEvaluationContext evaluationCtx = new FhirInstanceValidator.NullEvaluationContext();
 		XVerExtensionManager xverManager = new XVerExtensionManager(theWorkerContext);
 		try {
-			v = new InstanceValidator(theWorkerContext, evaluationCtx, xverManager);
+			v = new InstanceValidator(theWorkerContext, evaluationCtx, xverManager, new ValidatorSession());
 		} catch (Exception e) {
 			throw new ConfigurationException(Msg.code(648) + e.getMessage(), e);
 		}
diff --git a/pom.xml b/pom.xml
index 9b19056b43d..9ef5c44ced1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -967,7 +967,7 @@
 	</licenses>
 
 	<properties>
-		<fhir_core_version>6.4.0</fhir_core_version>
+		<fhir_core_version>6.4.4</fhir_core_version>
 		<spotless_version>2.41.1</spotless_version>
 		<surefire_jvm_args>-Dfile.encoding=UTF-8 -Xmx2048m</surefire_jvm_args>