fix field

README.md

@@ -45,12 +45,15 @@ The dataset contains titles, abstracts, keywords of papers written in Chinese fr
 | `csl`           |      396k |
 
 ### Data Fields
- - `id`: unique identifier for this document
- - `cc_file`: source file from connon crawl
- - `time`: extracted date/time from article
- - `title`: title extracted from article
- - `text`: extracted article body
- - `url`: source URL
+
+ - `doc_id`: unique identifier for this document
+ - `title`: title of the paper
+ - `abstract`: abstract of the paper
+ - `keywords`: keywords associated with the paper
+ - `category`: English translaction of the broad category (e.g., Engineering)
+ - `category_zho`: the broad category of the paper
+ - `discipline`: English translation of the academic discipline (e.g., Agricultural Engineering)
+ - `discipline_zho`: academic discipline of the paper
 
 ## Dataset Usage