diff --git a/README.md b/README.md
index c673baf..60f1578 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ data_sources:
     partitioningColumn: aggregate_id
 
   # Connect to a MySQL database
-  - id: postgres_source
+  - id: mysql_source
     description: Main events store
     type: mysql
     host: localhost
@@ -71,6 +71,16 @@ data_sources:
     autoIncrementingColumn: id
     partitioningColumn: aggregate_id
 
+  # Use a plain text file as a data source.
+  # Each line must be a valid JSON object.
+  # Values are projected as they are added.
+  - id: file_source
+    description: My file JSON event store
+    type: file
+    path: ./path/to/source.file
+    incrementingField: id
+    partitioningField: aggregate_id
+
 # Connections to your endpoint.
 # The Emulator will send data read from the databases to these endpoints.
 data_destinations:
diff --git a/examples/config.yml b/examples/config.yml
index 2a45380..54eb049 100644
--- a/examples/config.yml
+++ b/examples/config.yml
@@ -21,7 +21,7 @@ data_sources:
     partitioningColumn: aggregate_id
 
   # Connect to a MySQL database
-  - id: postgres_source
+  - id: mysql_source
     description: Main events store
     type: mysql
     host: localhost
@@ -56,6 +56,16 @@ data_sources:
     autoIncrementingColumn: id
     partitioningColumn: aggregate_id
 
+  # Use a plain text file as a data source.
+  # Each line must be a valid JSON object.
+  # Values are projected as they are added.
+  - id: file_source
+    description: My file JSON event store
+    type: file
+    path: ./path/to/source.file
+    incrementingField: id
+    partitioningField: aggregate_id
+
 # Connections to your endpoint.
 # The Emulator will send data read from the databases to these endpoints.
 data_destinations:
diff --git a/tests/Test/Config.hs b/tests/Test/Config.hs
index a7c4dec..caa6a87 100644
--- a/tests/Test/Config.hs
+++ b/tests/Test/Config.hs
@@ -45,6 +45,42 @@ testConfig = do
             description: The file source
             type: file
             path: ./source.txt
+            incrementingField: id
+            partitioningField: aggregate_id
+
+          - id: mysql_source
+            description: Main events store
+            type: mysql
+            host: localhost
+            port: 5432
+            username: my_user
+            password: my_pass
+            database: my_db
+            table: events_table
+            columns:
+              - id
+              - aggregate_id
+              - sequence_number
+              - payload
+            autoIncrementingColumn: id
+            partitioningColumn: aggregate_id
+
+          - id: sqlserver_source
+            description: Main events store
+            type: sqlserver
+            host: localhost
+            port: 1433
+            username: my_user
+            password: my_pass
+            database: my_db
+            table: events_table
+            columns:
+              - id
+              - aggregate_id
+              - sequence_number
+              - payload
+            autoIncrementingColumn: id
+            partitioningColumn: aggregate_id
 
         data_destinations:
           - id: file_destination
@@ -55,6 +91,8 @@ testConfig = do
             sources:
               - postgres_source
               - file_source
+              - mysql_source
+              - sqlserver_source
 
           - id: HTTP_destination
             description: my projection 2
@@ -66,8 +104,10 @@ testConfig = do
             sources:
               - postgres_source
               - file_source
+              - mysql_source
+              - sqlserver_source
         |]
-      annotate "source count" $ Map.size (c_sources  config) `shouldBe` 2
+      annotate "source count" $ Map.size (c_sources  config) `shouldBe` 4
       annotate "source count" $ Map.size (c_destinations  config) `shouldBe` 2
 
     it "detects duplicate sources" $ do
@@ -77,11 +117,15 @@ testConfig = do
             description: The file source
             type: file
             path: ./source.txt
+            incrementingField: id
+            partitioningField: aggregate_id
 
           - id: source_1
             description: The file source
             type: file
             path: ./source.txt
+            incrementingField: id
+            partitioningField: aggregate_id
 
         data_destinations:
           - id: file_destination
@@ -100,6 +144,8 @@ testConfig = do
             description: The file source
             type: file
             path: ./source.txt
+            incrementingField: id
+            partitioningField: aggregate_id
 
         data_destinations:
           - id: dest_1