diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/__init__.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/__init__.py
index c90fbe6be4d3..69bc3f31a5c6 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/__init__.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/__init__.py
@@ -24,10 +24,10 @@
     from .language_batch_result_py3 import LanguageBatchResult
     from .sentiment_batch_result_item_py3 import SentimentBatchResultItem
     from .sentiment_batch_result_py3 import SentimentBatchResult
-    from .match_record_py3 import MatchRecord
-    from .entity_record_py3 import EntityRecord
-    from .entities_batch_result_item_py3 import EntitiesBatchResultItem
-    from .entities_batch_result_py3 import EntitiesBatchResult
+    from .match_record_v2dot1_py3 import MatchRecordV2dot1
+    from .entity_record_v2dot1_py3 import EntityRecordV2dot1
+    from .entities_batch_result_item_v2dot1_py3 import EntitiesBatchResultItemV2dot1
+    from .entities_batch_result_v2dot1_py3 import EntitiesBatchResultV2dot1
 except (SyntaxError, ImportError):
     from .multi_language_input import MultiLanguageInput
     from .multi_language_batch_input import MultiLanguageBatchInput
@@ -43,10 +43,10 @@
     from .language_batch_result import LanguageBatchResult
     from .sentiment_batch_result_item import SentimentBatchResultItem
     from .sentiment_batch_result import SentimentBatchResult
-    from .match_record import MatchRecord
-    from .entity_record import EntityRecord
-    from .entities_batch_result_item import EntitiesBatchResultItem
-    from .entities_batch_result import EntitiesBatchResult
+    from .match_record_v2dot1 import MatchRecordV2dot1
+    from .entity_record_v2dot1 import EntityRecordV2dot1
+    from .entities_batch_result_item_v2dot1 import EntitiesBatchResultItemV2dot1
+    from .entities_batch_result_v2dot1 import EntitiesBatchResultV2dot1
 
 __all__ = [
     'MultiLanguageInput',
@@ -63,8 +63,8 @@
     'LanguageBatchResult',
     'SentimentBatchResultItem',
     'SentimentBatchResult',
-    'MatchRecord',
-    'EntityRecord',
-    'EntitiesBatchResultItem',
-    'EntitiesBatchResult',
+    'MatchRecordV2dot1',
+    'EntityRecordV2dot1',
+    'EntitiesBatchResultItemV2dot1',
+    'EntitiesBatchResultV2dot1',
 ]
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item_v2dot1.py
similarity index 81%
rename from azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item.py
rename to azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item_v2dot1.py
index 9a35dfcefe52..fd1ec79eff3c 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item_v2dot1.py
@@ -12,8 +12,8 @@
 from msrest.serialization import Model
 
 
-class EntitiesBatchResultItem(Model):
-    """EntitiesBatchResultItem.
+class EntitiesBatchResultItemV2dot1(Model):
+    """EntitiesBatchResultItemV2dot1.
 
     Variables are only populated by the server, and will be ignored when
     sending a request.
@@ -22,7 +22,7 @@ class EntitiesBatchResultItem(Model):
     :vartype id: str
     :ivar entities: Recognized entities in the document.
     :vartype entities:
-     list[~azure.cognitiveservices.language.textanalytics.models.EntityRecord]
+     list[~azure.cognitiveservices.language.textanalytics.models.EntityRecordV2dot1]
     """
 
     _validation = {
@@ -32,10 +32,10 @@ class EntitiesBatchResultItem(Model):
 
     _attribute_map = {
         'id': {'key': 'id', 'type': 'str'},
-        'entities': {'key': 'entities', 'type': '[EntityRecord]'},
+        'entities': {'key': 'entities', 'type': '[EntityRecordV2dot1]'},
     }
 
     def __init__(self, **kwargs):
-        super(EntitiesBatchResultItem, self).__init__(**kwargs)
+        super(EntitiesBatchResultItemV2dot1, self).__init__(**kwargs)
         self.id = None
         self.entities = None
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item_py3.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item_v2dot1_py3.py
similarity index 81%
rename from azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item_py3.py
rename to azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item_v2dot1_py3.py
index fa346acd6c4d..ec3a2474e488 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item_py3.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_item_v2dot1_py3.py
@@ -12,8 +12,8 @@
 from msrest.serialization import Model
 
 
-class EntitiesBatchResultItem(Model):
-    """EntitiesBatchResultItem.
+class EntitiesBatchResultItemV2dot1(Model):
+    """EntitiesBatchResultItemV2dot1.
 
     Variables are only populated by the server, and will be ignored when
     sending a request.
@@ -22,7 +22,7 @@ class EntitiesBatchResultItem(Model):
     :vartype id: str
     :ivar entities: Recognized entities in the document.
     :vartype entities:
-     list[~azure.cognitiveservices.language.textanalytics.models.EntityRecord]
+     list[~azure.cognitiveservices.language.textanalytics.models.EntityRecordV2dot1]
     """
 
     _validation = {
@@ -32,10 +32,10 @@ class EntitiesBatchResultItem(Model):
 
     _attribute_map = {
         'id': {'key': 'id', 'type': 'str'},
-        'entities': {'key': 'entities', 'type': '[EntityRecord]'},
+        'entities': {'key': 'entities', 'type': '[EntityRecordV2dot1]'},
     }
 
     def __init__(self, **kwargs) -> None:
-        super(EntitiesBatchResultItem, self).__init__(**kwargs)
+        super(EntitiesBatchResultItemV2dot1, self).__init__(**kwargs)
         self.id = None
         self.entities = None
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_v2dot1.py
similarity index 86%
rename from azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result.py
rename to azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_v2dot1.py
index 93a5a85d51b0..98cf0726b3f3 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_v2dot1.py
@@ -12,15 +12,15 @@
 from msrest.serialization import Model
 
 
-class EntitiesBatchResult(Model):
-    """EntitiesBatchResult.
+class EntitiesBatchResultV2dot1(Model):
+    """EntitiesBatchResultV2dot1.
 
     Variables are only populated by the server, and will be ignored when
     sending a request.
 
     :ivar documents:
     :vartype documents:
-     list[~azure.cognitiveservices.language.textanalytics.models.EntitiesBatchResultItem]
+     list[~azure.cognitiveservices.language.textanalytics.models.EntitiesBatchResultItemV2dot1]
     :ivar errors:
     :vartype errors:
      list[~azure.cognitiveservices.language.textanalytics.models.ErrorRecord]
@@ -32,11 +32,11 @@ class EntitiesBatchResult(Model):
     }
 
     _attribute_map = {
-        'documents': {'key': 'documents', 'type': '[EntitiesBatchResultItem]'},
+        'documents': {'key': 'documents', 'type': '[EntitiesBatchResultItemV2dot1]'},
         'errors': {'key': 'errors', 'type': '[ErrorRecord]'},
     }
 
     def __init__(self, **kwargs):
-        super(EntitiesBatchResult, self).__init__(**kwargs)
+        super(EntitiesBatchResultV2dot1, self).__init__(**kwargs)
         self.documents = None
         self.errors = None
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_py3.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_v2dot1_py3.py
similarity index 86%
rename from azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_py3.py
rename to azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_v2dot1_py3.py
index a39265c0e6a2..3cd68eb931fe 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_py3.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entities_batch_result_v2dot1_py3.py
@@ -12,15 +12,15 @@
 from msrest.serialization import Model
 
 
-class EntitiesBatchResult(Model):
-    """EntitiesBatchResult.
+class EntitiesBatchResultV2dot1(Model):
+    """EntitiesBatchResultV2dot1.
 
     Variables are only populated by the server, and will be ignored when
     sending a request.
 
     :ivar documents:
     :vartype documents:
-     list[~azure.cognitiveservices.language.textanalytics.models.EntitiesBatchResultItem]
+     list[~azure.cognitiveservices.language.textanalytics.models.EntitiesBatchResultItemV2dot1]
     :ivar errors:
     :vartype errors:
      list[~azure.cognitiveservices.language.textanalytics.models.ErrorRecord]
@@ -32,11 +32,11 @@ class EntitiesBatchResult(Model):
     }
 
     _attribute_map = {
-        'documents': {'key': 'documents', 'type': '[EntitiesBatchResultItem]'},
+        'documents': {'key': 'documents', 'type': '[EntitiesBatchResultItemV2dot1]'},
         'errors': {'key': 'errors', 'type': '[ErrorRecord]'},
     }
 
     def __init__(self, **kwargs) -> None:
-        super(EntitiesBatchResult, self).__init__(**kwargs)
+        super(EntitiesBatchResultV2dot1, self).__init__(**kwargs)
         self.documents = None
         self.errors = None
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record_v2dot1.py
similarity index 73%
rename from azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record.py
rename to azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record_v2dot1.py
index e4751b5dde80..92b879bfdc67 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record_v2dot1.py
@@ -12,17 +12,17 @@
 from msrest.serialization import Model
 
 
-class EntityRecord(Model):
-    """EntityRecord.
+class EntityRecordV2dot1(Model):
+    """EntityRecordV2dot1.
 
     Variables are only populated by the server, and will be ignored when
     sending a request.
 
     :param name: Entity formal name.
     :type name: str
-    :ivar matches: List of instances this entity appears in the text.
-    :vartype matches:
-     list[~azure.cognitiveservices.language.textanalytics.models.MatchRecord]
+    :param matches: List of instances this entity appears in the text.
+    :type matches:
+     list[~azure.cognitiveservices.language.textanalytics.models.MatchRecordV2dot1]
     :param wikipedia_language: Wikipedia language for which the WikipediaId
      and WikipediaUrl refers to.
     :type wikipedia_language: str
@@ -34,27 +34,34 @@ class EntityRecord(Model):
      conjunction with the Bing Entity Search API to fetch additional relevant
      information.
     :type bing_id: str
+    :param type: Entity type from Named Entity Recognition model
+    :type type: str
+    :param sub_type: Entity sub type from Named Entity Recognition model
+    :type sub_type: str
     """
 
     _validation = {
-        'matches': {'readonly': True},
         'wikipedia_url': {'readonly': True},
     }
 
     _attribute_map = {
         'name': {'key': 'name', 'type': 'str'},
-        'matches': {'key': 'matches', 'type': '[MatchRecord]'},
+        'matches': {'key': 'matches', 'type': '[MatchRecordV2dot1]'},
         'wikipedia_language': {'key': 'wikipediaLanguage', 'type': 'str'},
         'wikipedia_id': {'key': 'wikipediaId', 'type': 'str'},
         'wikipedia_url': {'key': 'wikipediaUrl', 'type': 'str'},
         'bing_id': {'key': 'bingId', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'sub_type': {'key': 'subType', 'type': 'str'},
     }
 
     def __init__(self, **kwargs):
-        super(EntityRecord, self).__init__(**kwargs)
+        super(EntityRecordV2dot1, self).__init__(**kwargs)
         self.name = kwargs.get('name', None)
-        self.matches = None
+        self.matches = kwargs.get('matches', None)
         self.wikipedia_language = kwargs.get('wikipedia_language', None)
         self.wikipedia_id = kwargs.get('wikipedia_id', None)
         self.wikipedia_url = None
         self.bing_id = kwargs.get('bing_id', None)
+        self.type = kwargs.get('type', None)
+        self.sub_type = kwargs.get('sub_type', None)
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record_py3.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record_v2dot1_py3.py
similarity index 68%
rename from azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record_py3.py
rename to azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record_v2dot1_py3.py
index d0f25f93e96e..3155f2279e92 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record_py3.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/entity_record_v2dot1_py3.py
@@ -12,17 +12,17 @@
 from msrest.serialization import Model
 
 
-class EntityRecord(Model):
-    """EntityRecord.
+class EntityRecordV2dot1(Model):
+    """EntityRecordV2dot1.
 
     Variables are only populated by the server, and will be ignored when
     sending a request.
 
     :param name: Entity formal name.
     :type name: str
-    :ivar matches: List of instances this entity appears in the text.
-    :vartype matches:
-     list[~azure.cognitiveservices.language.textanalytics.models.MatchRecord]
+    :param matches: List of instances this entity appears in the text.
+    :type matches:
+     list[~azure.cognitiveservices.language.textanalytics.models.MatchRecordV2dot1]
     :param wikipedia_language: Wikipedia language for which the WikipediaId
      and WikipediaUrl refers to.
     :type wikipedia_language: str
@@ -34,27 +34,34 @@ class EntityRecord(Model):
      conjunction with the Bing Entity Search API to fetch additional relevant
      information.
     :type bing_id: str
+    :param type: Entity type from Named Entity Recognition model
+    :type type: str
+    :param sub_type: Entity sub type from Named Entity Recognition model
+    :type sub_type: str
     """
 
     _validation = {
-        'matches': {'readonly': True},
         'wikipedia_url': {'readonly': True},
     }
 
     _attribute_map = {
         'name': {'key': 'name', 'type': 'str'},
-        'matches': {'key': 'matches', 'type': '[MatchRecord]'},
+        'matches': {'key': 'matches', 'type': '[MatchRecordV2dot1]'},
         'wikipedia_language': {'key': 'wikipediaLanguage', 'type': 'str'},
         'wikipedia_id': {'key': 'wikipediaId', 'type': 'str'},
         'wikipedia_url': {'key': 'wikipediaUrl', 'type': 'str'},
         'bing_id': {'key': 'bingId', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'sub_type': {'key': 'subType', 'type': 'str'},
     }
 
-    def __init__(self, *, name: str=None, wikipedia_language: str=None, wikipedia_id: str=None, bing_id: str=None, **kwargs) -> None:
-        super(EntityRecord, self).__init__(**kwargs)
+    def __init__(self, *, name: str=None, matches=None, wikipedia_language: str=None, wikipedia_id: str=None, bing_id: str=None, type: str=None, sub_type: str=None, **kwargs) -> None:
+        super(EntityRecordV2dot1, self).__init__(**kwargs)
         self.name = name
-        self.matches = None
+        self.matches = matches
         self.wikipedia_language = wikipedia_language
         self.wikipedia_id = wikipedia_id
         self.wikipedia_url = None
         self.bing_id = bing_id
+        self.type = type
+        self.sub_type = sub_type
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record_v2dot1.py
similarity index 90%
rename from azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record.py
rename to azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record_v2dot1.py
index bd8df34f6779..ac8629105872 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record_v2dot1.py
@@ -12,8 +12,8 @@
 from msrest.serialization import Model
 
 
-class MatchRecord(Model):
-    """MatchRecord.
+class MatchRecordV2dot1(Model):
+    """MatchRecordV2dot1.
 
     :param text: Entity text as appears in the request.
     :type text: str
@@ -31,7 +31,7 @@ class MatchRecord(Model):
     }
 
     def __init__(self, **kwargs):
-        super(MatchRecord, self).__init__(**kwargs)
+        super(MatchRecordV2dot1, self).__init__(**kwargs)
         self.text = kwargs.get('text', None)
         self.offset = kwargs.get('offset', None)
         self.length = kwargs.get('length', None)
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record_py3.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record_v2dot1_py3.py
similarity index 91%
rename from azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record_py3.py
rename to azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record_v2dot1_py3.py
index f539fb7b220f..2ebe64a82c0f 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record_py3.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/models/match_record_v2dot1_py3.py
@@ -12,8 +12,8 @@
 from msrest.serialization import Model
 
 
-class MatchRecord(Model):
-    """MatchRecord.
+class MatchRecordV2dot1(Model):
+    """MatchRecordV2dot1.
 
     :param text: Entity text as appears in the request.
     :type text: str
@@ -31,7 +31,7 @@ class MatchRecord(Model):
     }
 
     def __init__(self, *, text: str=None, offset: int=None, length: int=None, **kwargs) -> None:
-        super(MatchRecord, self).__init__(**kwargs)
+        super(MatchRecordV2dot1, self).__init__(**kwargs)
         self.text = text
         self.offset = offset
         self.length = length
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/text_analytics_client.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/text_analytics_client.py
index ee6526a34d06..b11f307ed1ae 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/text_analytics_client.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/text_analytics_client.py
@@ -36,7 +36,7 @@ def __init__(
             raise ValueError("Parameter 'endpoint' must not be None.")
         if credentials is None:
             raise ValueError("Parameter 'credentials' must not be None.")
-        base_url = '{Endpoint}/text/analytics/v2.0'
+        base_url = '{Endpoint}/text/analytics/v2.1-preview'
 
         super(TextAnalyticsClientConfiguration, self).__init__(base_url)
 
@@ -67,7 +67,7 @@ def __init__(
         super(TextAnalyticsClient, self).__init__(self.config.credentials, self.config)
 
         client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
-        self.api_version = 'v2.0'
+        self.api_version = 'v2.1-preview'
         self._serialize = Serializer(client_models)
         self._deserialize = Deserializer(client_models)
 
@@ -111,6 +111,7 @@ def key_phrases(
 
         # Construct headers
         header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
         header_parameters['Content-Type'] = 'application/json; charset=utf-8'
         if custom_headers:
             header_parameters.update(custom_headers)
@@ -119,9 +120,8 @@ def key_phrases(
         body_content = self._serialize.body(input, 'MultiLanguageBatchInput')
 
         # Construct and send request
-        request = self._client.post(url, query_parameters)
-        response = self._client.send(
-            request, header_parameters, body_content, stream=False, **operation_config)
+        request = self._client.post(url, query_parameters, header_parameters, body_content)
+        response = self._client.send(request, stream=False, **operation_config)
 
         if response.status_code not in [200]:
             raise models.ErrorResponseException(self._deserialize, response)
@@ -175,6 +175,7 @@ def detect_language(
 
         # Construct headers
         header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
         header_parameters['Content-Type'] = 'application/json; charset=utf-8'
         if custom_headers:
             header_parameters.update(custom_headers)
@@ -183,9 +184,8 @@ def detect_language(
         body_content = self._serialize.body(input, 'BatchInput')
 
         # Construct and send request
-        request = self._client.post(url, query_parameters)
-        response = self._client.send(
-            request, header_parameters, body_content, stream=False, **operation_config)
+        request = self._client.post(url, query_parameters, header_parameters, body_content)
+        response = self._client.send(request, stream=False, **operation_config)
 
         if response.status_code not in [200]:
             raise models.ErrorResponseException(self._deserialize, response)
@@ -242,6 +242,7 @@ def sentiment(
 
         # Construct headers
         header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
         header_parameters['Content-Type'] = 'application/json; charset=utf-8'
         if custom_headers:
             header_parameters.update(custom_headers)
@@ -250,9 +251,8 @@ def sentiment(
         body_content = self._serialize.body(input, 'MultiLanguageBatchInput')
 
         # Construct and send request
-        request = self._client.post(url, query_parameters)
-        response = self._client.send(
-            request, header_parameters, body_content, stream=False, **operation_config)
+        request = self._client.post(url, query_parameters, header_parameters, body_content)
+        response = self._client.send(request, stream=False, **operation_config)
 
         if response.status_code not in [200]:
             raise models.ErrorResponseException(self._deserialize, response)
@@ -273,9 +273,22 @@ def entities(
             self, documents=None, custom_headers=None, raw=False, **operation_config):
         """The API returns a list of recognized entities in a given document.
 
-        To get even more information on each recognized entity we recommend
-        using the Bing Entity Search API by querying for the recognized
-        entities names. See the <a
+        The API returns a list of recognized entities in a given document. To
+        get even more information on each recognized entity we recommend using
+        the Bing Entity Search API by querying for the recognized entities
+        names. See the <a
+        href="https://docs.microsoft.com/en-us/azure/cognitive-services/text-analytics/text-analytics-supported-languages">Supported
+        languages in Text Analytics API</a> for the list of enabled
+        languages.The API returns a list of known entities and general named
+        entities ("Person", "Location", "Organization" etc) in a given
+        document. Known entities are returned with Wikipedia Id and Wikipedia
+        link, and also Bing Id which can be used in Bing Entity Search API.
+        General named entities are returned with entity types. If a general
+        named entity is also a known entity, then all information regarding it
+        (Wikipedia Id, Bing Id, entity type etc) will be returned. See the <a
+        href="https://docs.microsoft.com/en-us/azure/cognitive-services/text-analytics/how-tos/text-analytics-how-to-entity-linking#supported-types-for-named-entity-recognition">Supported
+        Entity Types in Text Analytics API</a> for the list of supported Entity
+        Types. See the <a
         href="https://docs.microsoft.com/en-us/azure/cognitive-services/text-analytics/text-analytics-supported-languages">Supported
         languages in Text Analytics API</a> for the list of enabled languages.
 
@@ -287,9 +300,9 @@ def entities(
          deserialized response
         :param operation_config: :ref:`Operation configuration
          overrides<msrest:optionsforoperations>`.
-        :return: EntitiesBatchResult or ClientRawResponse if raw=true
+        :return: EntitiesBatchResultV2dot1 or ClientRawResponse if raw=true
         :rtype:
-         ~azure.cognitiveservices.language.textanalytics.models.EntitiesBatchResult
+         ~azure.cognitiveservices.language.textanalytics.models.EntitiesBatchResultV2dot1
          or ~msrest.pipeline.ClientRawResponse
         :raises:
          :class:`ErrorResponseException<azure.cognitiveservices.language.textanalytics.models.ErrorResponseException>`
@@ -308,6 +321,7 @@ def entities(
 
         # Construct headers
         header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
         header_parameters['Content-Type'] = 'application/json; charset=utf-8'
         if custom_headers:
             header_parameters.update(custom_headers)
@@ -316,9 +330,8 @@ def entities(
         body_content = self._serialize.body(input, 'MultiLanguageBatchInput')
 
         # Construct and send request
-        request = self._client.post(url, query_parameters)
-        response = self._client.send(
-            request, header_parameters, body_content, stream=False, **operation_config)
+        request = self._client.post(url, query_parameters, header_parameters, body_content)
+        response = self._client.send(request, stream=False, **operation_config)
 
         if response.status_code not in [200]:
             raise models.ErrorResponseException(self._deserialize, response)
@@ -326,7 +339,7 @@ def entities(
         deserialized = None
 
         if response.status_code == 200:
-            deserialized = self._deserialize('EntitiesBatchResult', response)
+            deserialized = self._deserialize('EntitiesBatchResultV2dot1', response)
 
         if raw:
             client_raw_response = ClientRawResponse(deserialized, response)
diff --git a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/version.py b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/version.py
index 9bd1dfac7ecb..8140355c0985 100644
--- a/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/version.py
+++ b/azure-cognitiveservices-language-textanalytics/azure/cognitiveservices/language/textanalytics/version.py
@@ -9,5 +9,5 @@
 # regenerated.
 # --------------------------------------------------------------------------
 
-VERSION = "0.2.0"
+VERSION = "v2.1-preview"