diff --git a/rfc/0013_Duniter_Encrypted_Wallet_Import_Format.md b/rfc/0013_Duniter_Encrypted_Wallet_Import_Format.md
index 6a07227453fe812cb08b89cbb53dc35732bb731f..7a2a396683c1663737e615a46554bfd594618333 100644
--- a/rfc/0013_Duniter_Encrypted_Wallet_Import_Format.md
+++ b/rfc/0013_Duniter_Encrypted_Wallet_Import_Format.md
@@ -15,9 +15,13 @@ License: CC-SA
 
 A wallet is a pair of asymmetric keys (a public key + a private key).
 
-The purpose of this RFC is to define a standard, inter-operable and secure file format for any DUBP wallet.
+The purpose of this RFC is to define a standard, inter-operable and secure format for any [DUBP] wallet.
 
-[DUBP](https://git.duniter.org/nodes/common/doc/blob/master/rfc/0010_Duniter_Blockchain_Protocol_V12.md) only deals with public keys and signatures.
+This RFC does not define a file format, it is agnostic of the way the wallet is stored on the disk.
+
+## DUBP
+
+[DUBP] only deals with public keys and signatures.
 
 A public key is always paired with a private key, which DUBP will never deal with.
 
@@ -27,11 +31,9 @@ So currently a public key for DUBP is to be understood as an Ed25519 public key.
 
 ## DEWIF format
 
-DEWIF is an inter-operable and secure file format for any DUBP wallet.
+DEWIF is an inter-operable and secure format for any DUBP wallet.
 
-The official extension is `.dewif`.
-
-DEWIF format is a text file containing a single base64 string.  
+DEWIF format is a base64 string.  
 This base64 string encodes a sequence of bytes whose structure is defined below.
 
 ## dewif bytes structure
@@ -57,7 +59,7 @@ v1 data (encrypted):
 |:--------------:|:-------------------:|
 | seed bytes     | public key bytes    |
 
-The public key serves as a checksum. To check that the `.dewif` file is not corrupted, simply generate an ed25519 keypair with the seed and check that the obtained public key matches.
+The public key serves as a checksum. To check that the DEWIF base64 string is not corrupted, simply generate an ed25519 keypair with the seed and check that the obtained public key matches.
 
 Symmetric encryption algorithm : aes256
 
@@ -98,7 +100,7 @@ v2 data (encrypted):
 |:---------------:|:--------------------:|:---------------:|:--------------------:|
 | seed bytes      | public key bytes     | seed bytes      | public key bytes     |
 
-The public key serves as a checksum. To check that the `.dewif` file is not corrupted, simply generate an ed25519 keypair with the seed and check that the obtained public key matches.
+The public key serves as a checksum. To check that the DEWIF base64 string is not corrupted, simply generate an ed25519 keypair with the seed and check that the obtained public key matches.
 
 Symmetric encryption algorithm : aes256
 
@@ -124,7 +126,7 @@ Encrypted data :
 |:--------------:|:-------------------:|
 | seed bytes     | public key bytes    |
 
-The public key serves as a checksum. To check that the `.dewif` file is not corrupted, simply generate an ed25519 keypair with the seed and check that the obtained public key matches.
+The public key serves as a checksum. To check that the DEWIF base64 string is not corrupted, simply generate an ed25519 keypair with the seed and check that the obtained public key matches.
 
 Symmetric encryption algorithm : aes256
 
@@ -157,3 +159,5 @@ p: 1
 DEWIF base 64 string (with aes key `"toto titi tata"`):
 
 `AAAAAxAAAAEPdMuBFXF4C6GZPGsJDiPBbacpVKeaLoJwkDsuqLjkwof1c760Z5iVpnZlLt5XEFlEehbdtLllVhccf9OK6Zjn8A==`
+
+[DUBP]: https://git.duniter.org/nodes/common/doc/blob/master/rfc/0010_Duniter_Blockchain_Protocol_V12.md