diff --git a/restws.module b/restws.module
index 66eee17..37812ba 100644
--- a/restws.module
+++ b/restws.module
@@ -195,7 +195,8 @@ class RestWSException extends Exception {
  * Sets the router item for the current path when it has a format.
  */
 function restws_init() {
-  _restws_reroute_format_requests();
+  // Determine the router item for the current path.
+  _restws_determine_router_item();
 }
 
 /**
@@ -206,7 +207,8 @@ function restws_init() {
  * Also, the restws_basic_auth module will need to use this function as well
  * to perform this again after logging a user in.
  */
-function _restws_reroute_format_requests() {
+function _restws_determine_router_item() {
+  // Determine the position of the resource and resource id in the path.
   if (strpos(request_path(), '.') === FALSE) {
     return;
   }
@@ -216,10 +218,14 @@ function _restws_reroute_format_requests() {
   }
   $formats = array_keys(restws_get_format_info());
 
+  // The pattern matches menu paths like 'node', 'user' followed by an ID.
+  // This ID cannot start with a 0 but can contain any digit.
   $pattern = '#^((?:';
   $pattern .= implode($menu_paths,'|');
   $pattern .= ')\/[1-9][0-9]*)\.(?:';
 
+  // The path will end with a format that is supported by restws, for example
+  // 'json' or 'xml'.
   $pattern .= implode($formats,'|');
   $pattern .= ')$#i';
 
diff --git a/restws_basic_auth/restws_basic_auth.module b/restws_basic_auth/restws_basic_auth.module
index fc8de43..dfb0cdd 100644
--- a/restws_basic_auth/restws_basic_auth.module
+++ b/restws_basic_auth/restws_basic_auth.module
@@ -34,9 +34,9 @@ function restws_basic_auth_init() {
         // user so that a response never gets into the page cache.
         drupal_page_is_cacheable(FALSE);
 
-        // Because we need to redetermine the page callback for
-        // /node/{id}.{format} calls, we call this.
-        _restws_reroute_format_requests();
+        // Redetermine the page callback for restws calls like node/1.json
+        // and user/1.json.
+        _restws_determine_router_item();
       }
       else {
         // Clear the login form error and remove the login failure message.