I guess all of you who have worked on UI testing know the "locator" problem. In order to find an element in the DOM you need to provide a locator and usually it's an XPath string. Sometimes that xpath can be quite nontrivial and in one day developers change the code and your locator cannot find the required element. In order to avoid such situations as much as possible my colleagues Peter Savage, Ronny Pfannschmidt and Karel Hala have developed a specification for frontend developers Open Web UI Design Specification for Enabling Automation (OUIA). If your application complies with OUIA it will have predictable locators and the behavior. This significantly simplifies writing automated tests.