CiviCRM's menu routeing system is built based on XML files. These XML files define what class gets loaded when a specific path is arrived at, what permissions are required to access that route.
CiviCRM's menu routing system is built based on XML files. These XML files define what class gets loaded when a specific path is arrived at, what permissions are required to access that route.
The standard menu XML files can be found in `CRM/Core/xml/Menu/`. Each route is defined as an "Item" Within the menu. In extensions you should add your menu to `<extension folder>/xml/Menu/<extensionName>.xml`
!!! Caution "Caution: Wild card sub-paths"
One path can match all subpaths. For example, `<path>civicrm/admin</path>` can match `http://example.org/civicrm/admin/f/o/o/b/a/r`. However, one should avoid designs which rely on this because it's imprecise and it can be difficult to integrate with some frontends.
One path can match all sub-paths. For example, `<path>civicrm/admin</path>` can match `http://example.org/civicrm/admin/f/o/o/b/a/r`. However, one should avoid designs which rely on this because it's imprecise and it can be difficult to integrate with some frontends.
