diff --git a/pyxform/constants.py b/pyxform/constants.py
index 19c5c84a..6ab670eb 100644
--- a/pyxform/constants.py
+++ b/pyxform/constants.py
@@ -101,6 +101,10 @@
 # The ODK XForms version that generated forms comply to
 CURRENT_XFORMS_VERSION = "1.0.0"
 
+# The ODK entities spec version that generated forms comply to
+CURRENT_ENTITIES_VERSION = "2022.1.0"
+ENTITY_RELATED = "false"
+
 DEPRECATED_DEVICE_ID_METADATA_FIELDS = ["subscriberid", "simserial"]
 
 AUDIO_QUALITY_VOICE_ONLY = "voice-only"
diff --git a/pyxform/survey.py b/pyxform/survey.py
index bee37241..bbbf26a6 100644
--- a/pyxform/survey.py
+++ b/pyxform/survey.py
@@ -173,6 +173,7 @@ class Survey(Section):
             "style": str,
             "attribute": dict,
             "namespaces": str,
+            constants.ENTITY_RELATED: str,
         }
     )  # yapf: disable
 
@@ -204,7 +205,9 @@ def _validate_uniqueness_of_section_names(self):
 
     def get_nsmap(self):
         """Add additional namespaces"""
-        namespaces = getattr(self, constants.NAMESPACES, None)
+        namespaces = getattr(self, constants.NAMESPACES, "")
+        if getattr(self, constants.ENTITY_RELATED, "false") == "true":
+            namespaces += " entities=http://www.opendatakit.org/xforms/entities"
 
         if namespaces and isinstance(namespaces, str):
             nslist = [
@@ -550,6 +553,8 @@ def xml_model(self):
         self._add_empty_translations()
 
         model_kwargs = {"odk:xforms-version": constants.CURRENT_XFORMS_VERSION}
+        if getattr(self, constants.ENTITY_RELATED, "false") == "true":
+            model_kwargs["entities:entities-version"] = constants.CURRENT_ENTITIES_VERSION
 
         model_children = []
         if self._translations:
diff --git a/pyxform/xls2json.py b/pyxform/xls2json.py
index cfb4eac2..5953b833 100644
--- a/pyxform/xls2json.py
+++ b/pyxform/xls2json.py
@@ -1429,6 +1429,7 @@ def workbook_to_json(
 
     entity_declaration = get_entity_declaration(workbook_dict)
     if len(entity_declaration) > 0:
+        json_dict[constants.ENTITY_RELATED] = "true"
         meta_children.append(entity_declaration)
 
     if len(meta_children) > 0:
diff --git a/tests/test_entities.py b/tests/test_entities.py
index 97f991cd..4d5e49a9 100644
--- a/tests/test_entities.py
+++ b/tests/test_entities.py
@@ -150,3 +150,53 @@ def test_entity_label__required(self):
             errored=True,
             error__contains=["The entities sheet is missing the required label column."],
         )
+
+    def test_dataset_in_entities_sheet__adds_entities_namespace(self):
+        self.assertPyxformXform(
+            name="data",
+            md="""
+            | survey   |         |       |       |
+            |          | type    | name  | label |
+            |          | text    | a     | A     |
+            | entities |         |       |       |
+            |          | dataset | label |       |
+            |          | trees   | a     |       |
+            """,
+            xml__contains=["xmlns:entities=\"http://www.opendatakit.org/xforms/entities\""],
+        )
+
+    def test_entities_namespace__omitted_if_no_entities_sheet(self):
+        self.assertPyxformXform(
+            name="data",
+            md="""
+            | survey   |         |       |       |
+            |          | type    | name  | label |
+            |          | text    | a     | A     |
+            """,
+            xml__excludes=["xmlns:entities=\"http://www.opendatakit.org/xforms/entities\""],
+        )
+
+    def test_dataset_in_entities_sheet__adds_entities_version(self):
+        self.assertPyxformXform(
+            name="data",
+            md="""
+            | survey   |         |       |       |
+            |          | type    | name  | label |
+            |          | text    | a     | A     |
+            | entities |         |       |       |
+            |          | dataset | label |       |
+            |          | trees   | a     |       |
+            """,
+            xml__xpath_match=['/h:html/h:head/x:model[@entities:entities-version = "2022.1.0"]']
+        )
+
+    def test_entities_version__omitted_if_no_entities_sheet(self):
+        self.assertPyxformXform(
+            name="data",
+            md="""
+            | survey   |         |       |       |
+            |          | type    | name  | label |
+            |          | text    | a     | A     |
+            """,
+            xml__excludes=["entities:entities-version = \"2022.1.0\""],
+        )
\ No newline at end of file