diff --git a/assets/README.md b/assets/README.md
index 418fdbecc82cdc61979325e9ca7a5e87604a3a7a..c4e758d634b7e0687de89333cbf09827bf2101ca 100644
--- a/assets/README.md
+++ b/assets/README.md
@@ -11,10 +11,10 @@ Json file **json\_text.json** in directory
         {
             "name": <title: string>,
             "author": [<author1: string>, <author2: string>, ...],
-            "year": <date: tring>,
+            "year": <date: string>,
             "journal": <journal: string>,
             "doi": <doi: string>,
-            "group": <"input"/"height"/"depth">,
+            "group": <"Input"/"Citedby"/"Reference">,
             "citations": <citation: int>
         }, ...
     ],
@@ -37,7 +37,8 @@ Access to the server:
 
 ## Files in Directory
 - **index.html**: webpage
-- **cn.js**: javascript code for force-directed graph, text elements and legend
+- **cn_default.js**: javascript code for force-directed graph, text elements and legend (default version)
+- **cn_timeline.js**: javascript code for force-directed graph, text elements and legend (timeline version)
 - **json_text.json**: example data