diff --git a/README.md b/README.md
index 0c52247..3b324df 100644
--- a/README.md
+++ b/README.md
@@ -10,12 +10,44 @@ Jupyter notebook providing VTL support through Trevas engine
 Custom functions have been introduced into the Trevas engine.
 
 | Name         | Arguments                | Description                          |
-| ------------ | ------------------------ | ------------------------------------ |
+|--------------|--------------------------|--------------------------------------|
 | loadParquet  | String url               | Load Parquet dataset                 |
-| loadCSV      | String url               | Load CSV dataset                     |
+| loadCSV (1)  | String url               | Load CSV dataset                     |
 | loadSas      | String url               | Load Sas dataset                     |
 | writeParquet | (String url, Dataset ds) | Write given dataset in Parquet       |
-| writeCSV     | (String url, Dataset ds) | Write given dataset in CSV           |
+| writeCSV (2) | (String url, Dataset ds) | Write given dataset in CSV           |
 | show         | Dataset ds               | Display firt rows of a given dataset |
 | showMetadata | Dataset ds               | Display metadata of a given dataset  |
 | size         | Dataset ds               | Display size of a given dataset      |
+
+### (1) loadCSV
+
+Default option values:
+
+|    Name     |  Value  |
+|:-----------:|:-------:|
+|   header    |  true   |
+|  delimiter  |    ;    |
+|    quote    |    "    |
+
+Any CSV option can be defined or overridden thanks to url parameters (values have to be encoded).
+
+For instance, to read a CSV content where delimiter is `|` and quote is `'`: 
+
+`loadCSV(...?delimiter=%7C&quote=%27)`
+
+### (2) writeCSV
+
+Default option values:
+
+|    Name     |  Value  |
+|:-----------:|:-------:|
+|   header    |  true   |
+|  delimiter  |    ;    |
+|    quote    |    "    |
+
+Any CSV option can be defined or overridden thanks to url parameters (values have to be encoded).
+
+For instance, to write a CSV with a content delimited by `|` and quoted by `'`:
+
+`writeCSV(...?delimiter=%7C&quote=%27)`
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