diff --git a/schemas/2018-06-01/Microsoft.DataFactory.json b/schemas/2018-06-01/Microsoft.DataFactory.json
index be2045ccf1..b8a8614fc1 100644
--- a/schemas/2018-06-01/Microsoft.DataFactory.json
+++ b/schemas/2018-06-01/Microsoft.DataFactory.json
@@ -8665,6 +8665,9 @@
         {
           "$ref": "#/definitions/MappingDataFlow"
         },
+        {
+          "$ref": "#/definitions/Flowlet"
+        },
         {
           "$ref": "#/definitions/WranglingDataFlow"
         }
@@ -8780,6 +8783,17 @@
           "type": "string",
           "description": "Transformation description."
         },
+        "flowlet": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/DataFlowReference"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Data flow reference type."
+        },
         "linkedService": {
           "oneOf": [
             {
@@ -8830,6 +8844,17 @@
           "type": "string",
           "description": "Transformation description."
         },
+        "flowlet": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/DataFlowReference"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Data flow reference type."
+        },
         "linkedService": {
           "oneOf": [
             {
@@ -9351,43 +9376,8 @@
       ],
       "description": "The Azure Data Factory nested object which identifies data within different data stores, such as tables, files, folders, and documents."
     },
-    "DatasetBZip2Compression": {
-      "type": "object",
-      "properties": {
-        "type": {
-          "type": "string",
-          "enum": [
-            "BZip2"
-          ]
-        }
-      },
-      "required": [
-        "type"
-      ],
-      "description": "The BZip2 compression method used on a dataset."
-    },
     "DatasetCompression": {
       "type": "object",
-      "oneOf": [
-        {
-          "$ref": "#/definitions/DatasetBZip2Compression"
-        },
-        {
-          "$ref": "#/definitions/DatasetGZipCompression"
-        },
-        {
-          "$ref": "#/definitions/DatasetDeflateCompression"
-        },
-        {
-          "$ref": "#/definitions/DatasetZipDeflateCompression"
-        },
-        {
-          "$ref": "#/definitions/DatasetTarCompression"
-        },
-        {
-          "$ref": "#/definitions/DatasetTarGZipCompression"
-        }
-      ],
       "properties": {
         "additionalProperties": {
           "oneOf": [
@@ -9404,29 +9394,22 @@
             }
           ],
           "description": "Unmatched properties from the message are deserialized this collection"
-        }
-      },
-      "description": "The compression method used on a dataset."
-    },
-    "DatasetDeflateCompression": {
-      "type": "object",
-      "properties": {
+        },
         "level": {
           "type": "object",
           "properties": {},
-          "description": "The Deflate compression level."
+          "description": "The dataset compression level. Type: string (or Expression with resultType string)."
         },
         "type": {
-          "type": "string",
-          "enum": [
-            "Deflate"
-          ]
+          "type": "object",
+          "properties": {},
+          "description": "Type of dataset compression. Type: string (or Expression with resultType string)."
         }
       },
       "required": [
         "type"
       ],
-      "description": "The Deflate compression method used on a dataset."
+      "description": "The compression method used on a dataset."
     },
     "DatasetFolder": {
       "type": "object",
@@ -9438,26 +9421,6 @@
       },
       "description": "The folder that this Dataset is in. If not specified, Dataset will appear at the root level."
     },
-    "DatasetGZipCompression": {
-      "type": "object",
-      "properties": {
-        "level": {
-          "type": "object",
-          "properties": {},
-          "description": "The GZip compression level."
-        },
-        "type": {
-          "type": "string",
-          "enum": [
-            "GZip"
-          ]
-        }
-      },
-      "required": [
-        "type"
-      ],
-      "description": "The GZip compression method used on a dataset."
-    },
     "DatasetLocation": {
       "type": "object",
       "oneOf": [
@@ -9624,61 +9587,6 @@
       },
       "description": "The format definition of a storage."
     },
-    "DatasetTarCompression": {
-      "type": "object",
-      "properties": {
-        "type": {
-          "type": "string",
-          "enum": [
-            "Tar"
-          ]
-        }
-      },
-      "required": [
-        "type"
-      ],
-      "description": "The Tar archive method used on a dataset."
-    },
-    "DatasetTarGZipCompression": {
-      "type": "object",
-      "properties": {
-        "level": {
-          "type": "object",
-          "properties": {},
-          "description": "The TarGZip compression level."
-        },
-        "type": {
-          "type": "string",
-          "enum": [
-            "TarGZip"
-          ]
-        }
-      },
-      "required": [
-        "type"
-      ],
-      "description": "The TarGZip compression method used on a dataset."
-    },
-    "DatasetZipDeflateCompression": {
-      "type": "object",
-      "properties": {
-        "level": {
-          "type": "object",
-          "properties": {},
-          "description": "The ZipDeflate compression level."
-        },
-        "type": {
-          "type": "string",
-          "enum": [
-            "ZipDeflate"
-          ]
-        }
-      },
-      "required": [
-        "type"
-      ],
-      "description": "The ZipDeflate compression method used on a dataset."
-    },
     "Db2LinkedService": {
       "type": "object",
       "properties": {
@@ -13016,6 +12924,118 @@
       ],
       "description": "Filter activity properties."
     },
+    "Flowlet": {
+      "type": "object",
+      "properties": {
+        "additionalProperties": {
+          "oneOf": [
+            {
+              "type": "object",
+              "additionalProperties": {
+                "type": "object",
+                "properties": {}
+              },
+              "properties": {}
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Unmatched properties from the message are deserialized this collection"
+        },
+        "type": {
+          "type": "string",
+          "enum": [
+            "Flowlet"
+          ]
+        },
+        "typeProperties": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/FlowletTypeProperties"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Flowlet type properties."
+        }
+      },
+      "required": [
+        "type"
+      ],
+      "description": "Data flow flowlet"
+    },
+    "FlowletTypeProperties": {
+      "type": "object",
+      "properties": {
+        "additionalProperties": {
+          "type": "object",
+          "properties": {}
+        },
+        "script": {
+          "type": "string",
+          "description": "Flowlet script."
+        },
+        "scriptLines": {
+          "oneOf": [
+            {
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Flowlet script lines."
+        },
+        "sinks": {
+          "oneOf": [
+            {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/DataFlowSink"
+              }
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "List of sinks in Flowlet."
+        },
+        "sources": {
+          "oneOf": [
+            {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/DataFlowSource"
+              }
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "List of sources in Flowlet."
+        },
+        "transformations": {
+          "oneOf": [
+            {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/Transformation"
+              }
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "List of transformations in Flowlet."
+        }
+      },
+      "description": "Flowlet type properties."
+    },
     "ForEachActivity": {
       "type": "object",
       "properties": {
@@ -18394,6 +18414,20 @@
           "type": "string",
           "description": "DataFlow script."
         },
+        "scriptLines": {
+          "oneOf": [
+            {
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Data flow script lines."
+        },
         "sinks": {
           "oneOf": [
             {
@@ -21764,6 +21798,17 @@
           "type": "string",
           "description": "Transformation description."
         },
+        "flowlet": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/DataFlowReference"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Data flow reference type."
+        },
         "linkedService": {
           "oneOf": [
             {
@@ -21842,6 +21887,17 @@
           "type": "string",
           "description": "Transformation description."
         },
+        "flowlet": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/DataFlowReference"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Data flow reference type."
+        },
         "linkedService": {
           "oneOf": [
             {
@@ -28191,6 +28247,17 @@
           "type": "string",
           "description": "Transformation description."
         },
+        "flowlet": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/DataFlowReference"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Data flow reference type."
+        },
         "name": {
           "type": "string",
           "description": "Transformation name."