Update README.md

README.md

@@ -9,4 +9,27 @@ size_categories:
 
 # [doc] formats - csv - 2
 
-This dataset contains one csv file at the root. We define the separator as `,` in the YAML config.
+This dataset contains one csv file at the root:
+
+- [data.csv](./data.csv)
+
+```csv
+kind,sound
+dog,woof
+cat,meow
+pokemon,pika
+human,hello
+```
+
+We define the separator as `","` in the YAML config, as well as the config name and the location of the file, with a glob expression:
+
+```yaml
+---
+configs:
+- config_name: default
+  data_files: "*.csv"
+  sep: ","
+size_categories:
+- n<1K
+---
+```