diff --git a/toscaparser/elements/tosca_type_validation.py b/toscaparser/elements/tosca_type_validation.py
index 899c718..16764bc 100644
--- a/toscaparser/elements/tosca_type_validation.py
+++ b/toscaparser/elements/tosca_type_validation.py
@@ -22,13 +22,12 @@ class TypeValidation(object):
                              DSL_DEFINITIONS, NODE_TYPES, REPOSITORIES,
                              DATA_TYPES, ARTIFACT_TYPES, GROUP_TYPES,
                              RELATIONSHIP_TYPES, CAPABILITY_TYPES,
-                             INTERFCAE_TYPES, POLICY_TYPES, DATATYPE_DEFINITIONS) = \
-        ('tosca_definitions_version', 'description',
-         'imports', 'dsl_definitions', 'node_types',
-         'repositories', 'data_types', 'group_types',
-         'artifact_types', 'relationship_types',
-         'capability_types', 'interface_types',
-         'policy_types', 'datatype_definitions')
+                             INTERFACE_TYPES, POLICY_TYPES) = \
+        ('tosca_definitions_version', 'description', 'imports',
+         'dsl_definitions', 'node_types', 'repositories',
+         'data_types', 'artifact_types', 'group_types',
+         'relationship_types', 'capability_types',
+         'interface_types', 'policy_types')
     VALID_TEMPLATE_VERSIONS = ['tosca_simple_yaml_1_0']
     exttools = ExtTools()
     VALID_TEMPLATE_VERSIONS.extend(exttools.get_versions())
diff --git a/toscaparser/tests/data/datatypes/custom_datatype_def.yaml b/toscaparser/tests/data/datatypes/custom_datatype_def.yaml
index 4b7da71..455e406 100644
--- a/toscaparser/tests/data/datatypes/custom_datatype_def.yaml
+++ b/toscaparser/tests/data/datatypes/custom_datatype_def.yaml
@@ -10,7 +10,7 @@ node_types:
       people:
         type: tosca.my.datatypes.People
 
-datatype_definitions:
+data_types:
   tosca.my.datatypes.PeopleBase:
     properties:
       name:
diff --git a/toscaparser/tests/data/datatypes/test_custom_datatypes_in_current_template.yaml b/toscaparser/tests/data/datatypes/test_custom_datatypes_in_current_template.yaml
index aefe862..edc755b 100644
--- a/toscaparser/tests/data/datatypes/test_custom_datatypes_in_current_template.yaml
+++ b/toscaparser/tests/data/datatypes/test_custom_datatypes_in_current_template.yaml
@@ -10,7 +10,7 @@ node_types:
       people:
         type: tosca.my.datatypes.People
 
-datatype_definitions:
+data_types:
   tosca.my.datatypes.PeopleBase:
     properties:
       name:
@@ -62,4 +62,4 @@ topology_template:
               contact_phone: '123456789'}
             - {contact_name: Jerry,
               contact_email: jerry@email.com,
-              contact_phone: '321654987'}
\ No newline at end of file
+              contact_phone: '321654987'}
diff --git a/toscaparser/tosca_template.py b/toscaparser/tosca_template.py
index 7472278..8e427db 100644
--- a/toscaparser/tosca_template.py
+++ b/toscaparser/tosca_template.py
@@ -34,13 +34,13 @@ SECTIONS = (DEFINITION_VERSION, DEFAULT_NAMESPACE, TEMPLATE_NAME,
             TOPOLOGY_TEMPLATE, TEMPLATE_AUTHOR, TEMPLATE_VERSION,
             DESCRIPTION, IMPORTS, DSL_DEFINITIONS, NODE_TYPES,
             RELATIONSHIP_TYPES, RELATIONSHIP_TEMPLATES,
-            CAPABILITY_TYPES, ARTIFACT_TYPES, DATATYPE_DEFINITIONS,
+            CAPABILITY_TYPES, ARTIFACT_TYPES, DATA_TYPES,
             POLICY_TYPES, GROUP_TYPES) = \
            ('tosca_definitions_version', 'tosca_default_namespace',
             'template_name', 'topology_template', 'template_author',
             'template_version', 'description', 'imports', 'dsl_definitions',
             'node_types', 'relationship_types', 'relationship_templates',
-            'capability_types', 'artifact_types', 'datatype_definitions',
+            'capability_types', 'artifact_types', 'data_types',
             'policy_types', 'group_types')
 # Sections that are specific to individual template definitions
 SPECIAL_SECTIONS = (METADATA) = ('metadata')
@@ -145,7 +145,7 @@ class ToscaTemplate(object):
 
     def _get_all_custom_defs(self, imports=None):
         types = [IMPORTS, NODE_TYPES, CAPABILITY_TYPES, RELATIONSHIP_TYPES,
-                 DATATYPE_DEFINITIONS, POLICY_TYPES, GROUP_TYPES]
+                 DATA_TYPES, POLICY_TYPES, GROUP_TYPES]
         custom_defs_final = {}
         custom_defs = self._get_custom_types(types, imports)
         if custom_defs: