diff --git a/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/docs/server_jpa_mdm/mdm_rules.md b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/docs/server_jpa_mdm/mdm_rules.md
index 6ea573ccc39..aa1320cd352 100644
--- a/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/docs/server_jpa_mdm/mdm_rules.md
+++ b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/docs/server_jpa_mdm/mdm_rules.md
@@ -356,6 +356,14 @@ The following algorithms are currently supported:
If an optional "identifierSystem" is provided, then the identifiers only match when they belong to that system |
+
+ EMPTY_FIELD |
+ matcher |
+
+ Matches an empty field.
+ |
+ |
+
JARO_WINKLER |
similarity |
@@ -395,7 +403,7 @@ The following algorithms are currently supported:
tdebatty Sorensen-Dice coefficient
|
-
+
diff --git a/hapi-fhir-server-mdm/src/main/java/ca/uhn/fhir/mdm/rules/matcher/EmptyFieldMatcher.java b/hapi-fhir-server-mdm/src/main/java/ca/uhn/fhir/mdm/rules/matcher/EmptyFieldMatcher.java
index d8bfb320076..fbaacfa0c08 100644
--- a/hapi-fhir-server-mdm/src/main/java/ca/uhn/fhir/mdm/rules/matcher/EmptyFieldMatcher.java
+++ b/hapi-fhir-server-mdm/src/main/java/ca/uhn/fhir/mdm/rules/matcher/EmptyFieldMatcher.java
@@ -1,5 +1,25 @@
package ca.uhn.fhir.mdm.rules.matcher;
+/*-
+ * #%L
+ * HAPI FHIR - Master Data Management
+ * %%
+ * Copyright (C) 2014 - 2021 Smile CDR, Inc.
+ * %%
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * #L%
+ */
+
import ca.uhn.fhir.context.FhirContext;
import org.hl7.fhir.instance.model.api.IBase;