diff --git a/README.md b/README.md
index cb5ddf6..fc92940 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+| Variable                                                                                                                                                                  | Description                                             |
+|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------|
+| **<a id="vps_domain_name" name="vps_domain_name">vps_domain_name</a>**<br/>[`string`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory` | The domain name of the VPS.<br/>**Example**: example.fr |
+
 # Pedagogic html static file server
 
 > [!NOTE]
@@ -18,11 +22,11 @@
 > - Restarting Nginx: Nginx is restarted to apply the changes.\
 > **Path**: nginx
 
-| Variable                                                                                                                                                                                     | Description                                                                                         |
-|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------|
-| **<a id="nginx.domain_name" name="nginx.domain_name">nginx.domain_name</a>**<br/>[`domainname`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`          | Domain name.<br/>**Validator**: type domainname<br/>**Example**: exemple.fr                         |
-| **<a id="nginx.email" name="nginx.email">nginx.email</a>**<br/>[`mail`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`                                  | Email for the domain name.<br/>This is for certbot.<br/>**Example**: contact@exemple.fr             |
-| **<a id="nginx.htpasswd_file" name="nginx.htpasswd_file">nginx.htpasswd_file</a>**<br/>[`UNIX filename`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory` | Htpassword file.<br/>**Validator**: file type allowed: "file"<br/>**Default**: /etc/nginx/.htpasswd |
+| Variable                                                                                                                                                                                     | Description                                                                                                                                                             |
+|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| **<a id="nginx.domain_name" name="nginx.domain_name">nginx.domain_name</a>**<br/>[`domainname`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`          | Domain name.<br/>**Validator**: type domainname<br/>**Default**: the value of the variable "[The domain name of the VPS](#vps_domain_name)"<br/>**Example**: example.fr |
+| **<a id="nginx.email" name="nginx.email">nginx.email</a>**<br/>[`mail`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`                                  | Email for the domain name.<br/>This is for certbot.<br/>**Example**: contact@exemple.fr                                                                                 |
+| **<a id="nginx.htpasswd_file" name="nginx.htpasswd_file">nginx.htpasswd_file</a>**<br/>[`UNIX filename`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory` | Htpassword user credential file name.<br/>**Validator**: file type allowed: "file"<br/>**Default**: /etc/nginx/.htpasswd                                                |
 
 ## Nginx authenticated user credentials
 
diff --git a/structure.yml b/structure.yml
index 80ecc3d..f7687b9 100644
--- a/structure.yml
+++ b/structure.yml
@@ -10,7 +10,7 @@ vps_domain_name:
 nginx:
   description: pedagogic html static file server
   help: |-
-    This is a complete Ansible playbook to configure Nginx with basic authentication using htpasswd. 
+    This is a complete Ansible playbook to configure Nginx with basic authentication using htpasswd.
     This playbook installs Nginx, configures a static website, and secures access with basic authentication.
 
     steps:
@@ -27,6 +27,8 @@ nginx:
 
   domain_name:
     description: domain name
+    default: 
+      variable: __.vps_domain_name
     examples:
       - example.fr
     type: domainname