[TASK] Fix description of additionalCanonicalizedUrlParameters

Documentation/ApiOverview/Seo/CanonicalApi.rst

@@ -16,27 +16,32 @@ cHash.
    EXT:seo. You can find information about how to install and use it in the
    :doc:`EXT:seo manual <ext_seo:Index>`.
 
-Excluding arguments from the generation
-=======================================
+.. _canonicalapi-additionalparameters:
 
-TYPO3 will fallback to building a URL of current page and appending query strings.
-It is possible to exclude specific arguments from being appended.
+Including specific arguments from the generation
+================================================
+
+TYPO3 will building a URI of the current page and append query strings
+which are needed for the cHash calculation (vital arguments to uniquely identify
+the given content URI).
+
+It is possible to additionally include specific arguments.
 This is achieved by adding those arguments to a PHP variable:
 
-.. code-block:: php
-   :caption: EXT:site_package/ext_localconf.php
+..  code-block:: php
+    :caption: EXT:site_package/ext_localconf.php
 
-   $GLOBALS['TYPO3_CONF_VARS']['FE']['additionalCanonicalizedUrlParameters'][] = 'example_argument_name';
+    $GLOBALS['TYPO3_CONF_VARS']['FE']['additionalCanonicalizedUrlParameters'][] = 'example_argument_name';
 
-It is possible to exclude nested arguments:
+It is possible to include nested arguments:
 
-.. code-block:: php
-   :caption: EXT:site_package/ext_localconf.php
+..  code-block:: php
+    :caption: EXT:site_package/ext_localconf.php
 
-   $GLOBALS['TYPO3_CONF_VARS']['FE']['additionalCanonicalizedUrlParameters'][] = 'example_argument_name[second_level]';
+    $GLOBALS['TYPO3_CONF_VARS']['FE']['additionalCanonicalizedUrlParameters'][] = 'example_argument_name[second_level]';
 
-Arguments in general should be excluded from cHash as well as ``additionalCanonicalizedUrlParameters``.
-See the possible options in :ref:`caching`, regarding excluding arguments from cHash.
+Non-vital arguments in general should be excluded from cHash and not be listed as ``additionalCanonicalizedUrlParameters``.
+See the possible options in :ref:`caching` regarding excluding arguments from cHash.
 
 The idea behind that is:
 

Documentation/Configuration/Typo3ConfVars/FE.rst

@@ -449,7 +449,8 @@ the TYPO3 frontend:
     :type: array
     :Default: []
 
-    The given parameters will be included when calculating canonicalized URL
+    The given parameters will be included when calculating canonicalized URL.
+    See :ref:`canonicalapi-additionalparameters` for details.
 
 ..  _typo3ConfVars_fe_cacheHash: