diff --git a/docs/tutorial.txt b/docs/tutorial.txt
index 5d7dcc6..a47f04a 100644
--- a/docs/tutorial.txt
+++ b/docs/tutorial.txt
@@ -71,6 +71,15 @@ Where::
  ordered parameters = "groups", "Games", "Adventure", "Adult"
  unordered parameters = array( "Larry", "7" )
 
+When creating a configuration with ordered parameters, those parameters are
+required to be present in the parsed URL, in the same number as the
+configuration states. Having a different number of ordered parameters in the
+parsed URL will lead to wrong values assigned to the unordered parameters (if
+any follow the ordered parameters).
+
+Working with a variable number of ordered parameters is explained in the
+`Changing a url configuration dynamically`_ section.
+
 Working with the query part
 ===========================
 
diff --git a/src/url.php b/src/url.php
index 2370434..9e312cc 100644
--- a/src/url.php
+++ b/src/url.php
@@ -27,6 +27,15 @@
  * ordered parameters = "groups", "Games", "Adventure", "Adult"
  * unordered parameters = array( "Larry", "7" )
  *
+ * When creating a configuration with ordered parameters, those parameters are
+ * required to be present in the parsed URL, in the same number as the
+ * configuration states. Having a different number of ordered parameters in the
+ * parsed URL will lead to wrong values assigned to the unordered parameters (if
+ * any follow the ordered parameters).
+ *
+ * See the tutorial for a way to change configurations dynamically based on
+ * the ordered parameters.
+ *
  * Example of use:
  * <code>
  * // create an ezcUrlConfiguration object
@@ -574,6 +583,9 @@ public function isRelative()
      * Returns the value of the specified parameter from the URL based on the
      * active URL configuration.
      *
+     * Ordered parameters must appear before unordered parameters in the parsed
+     * URL, in the same number and order as they are defined in the configuration.
+     *
      * Unordered parameter examples:
      * <code>
      * $urlCfg = new ezcUrlConfiguration();
diff --git a/src/url_configuration.php b/src/url_configuration.php
index b67f4fa..d330739 100644
--- a/src/url_configuration.php
+++ b/src/url_configuration.php
@@ -12,6 +12,29 @@
 /**
  * ezcUrlConfiguration makes it possible to use a custom URL form in your application.
  *
+ * A URL is assumed to be of this form:
+ * scheme://host/basedir/script/ordered_parameters/unordered_parameters
+ *
+ * Example:
+ * http://example.com/mydir/index.php/groups/Games/Adventure/Adult/(game)/Larry/7
+ *
+ * Where:
+ * scheme = "http"
+ * host = "example.com"
+ * basedir = "mydir"
+ * script = "index.php"
+ * ordered parameters = "groups", "Games", "Adventure", "Adult"
+ * unordered parameters = array( "Larry", "7" )
+ *
+ * When creating a configuration with ordered parameters, those parameters are
+ * required to be present in the parsed URL, in the same number as the
+ * configuration states. Having a different number of ordered parameters in the
+ * parsed URL will lead to wrong values assigned to the unordered parameters (if
+ * any follow the ordered parameters).
+ *
+ * See the tutorial for a way to change configurations dynamically based on
+ * the ordered parameters.
+ *
  * Example of use:
  * <code>
  * // create an ezcUrlConfiguration object
@@ -236,6 +259,10 @@ public function __isset( $name )
     /**
      * Adds an ordered parameter to the URL configuration.
      *
+     * Ordered parameters must be added before unordered parameters, and
+     * they must appear in the parsed URL in the same number and order
+     * as they are defined in the configuration.
+     *
      * @param string $name The name of the ordered parameter to add to the configuration
      */
     public function addOrderedParameter( $name )
@@ -289,6 +316,10 @@ public function removeOrderedParameter( $name )
      * $param1 = $url->getParam( 'param1' ); // will return array( array( "x" ), array( "y", "z" ) )
      * </code>
      *
+     * Ordered parameters must be added before unordered parameters, and
+     * they must appear in the parsed URL in the same number and order
+     * as they are defined in the configuration.
+     *
      * @param string $name The name of the unordered parameter to add to the configuration
      * @param int $type The type of the unordered parameter
      */