diff --git a/specification/datalake-store/data-plane/Microsoft.DataLakeStore/preview/2015-10-01-preview/filesystem.json b/specification/datalake-store/data-plane/Microsoft.DataLakeStore/preview/2015-10-01-preview/filesystem.json
index e0588df749be..6b63469b2d24 100644
--- a/specification/datalake-store/data-plane/Microsoft.DataLakeStore/preview/2015-10-01-preview/filesystem.json
+++ b/specification/datalake-store/data-plane/Microsoft.DataLakeStore/preview/2015-10-01-preview/filesystem.json
@@ -304,7 +304,7 @@
               "type": "string"
             },
             "collectionFormat": "csv",
-            "description": "A list of comma seperated Data Lake Store paths (starting with '/') of the files to concatenate, in the order in which they should be concatenated."
+            "description": "A list of comma separated Data Lake Store paths (starting with '/') of the files to concatenate, in the order in which they should be concatenated."
           },
           {
             "name": "op",
@@ -426,14 +426,14 @@
             "in": "query",
             "required": false,
             "type": "string",
-            "description": "Gets or sets the item or lexographical index after which to begin returning results. For example, a file list of 'a','b','d' and listAfter='b' will return 'd', and a listAfter='c' will also return 'd'. Optional."
+            "description": "Gets or sets the item or lexicographical index after which to begin returning results. For example, a file list of 'a','b','d' and listAfter='b' will return 'd', and a listAfter='c' will also return 'd'. Optional."
           },
           {
             "name": "listBefore",
             "in": "query",
             "required": false,
             "type": "string",
-            "description": "Gets or sets the item or lexographical index before which to begin returning results. For example, a file list of 'a','b','d' and listBefore='d' will return 'a','b', and a listBefore='c' will also return 'a','b'. Optional."
+            "description": "Gets or sets the item or lexicographical index before which to begin returning results. For example, a file list of 'a','b','d' and listBefore='d' will return 'a','b', and a listBefore='c' will also return 'a','b'. Optional."
           },
           {
             "name": "op",
@@ -1400,7 +1400,7 @@
           "type": "integer",
           "readOnly": true,
           "format": "int64",
-          "description": "the number of bytes used by the contet."
+          "description": "the number of bytes used by the content."
         },
         "spaceConsumed": {
           "type": "integer",