The JUnit Platform's extension of Open Test Reporting: metadata of a test or container, written into the 'metadata' element of the core namespace. The JUnit Platform names the namespace's schema 'https://schemas.junit.org/open-test-reporting/junit-1.9.xsd'; its source is junit-platform-reporting/src/main/resources/org/junit/platform/reporting/open/xml/junit.xsd in https://github.com/junit-team/junit-framework. This schema declares the same three elements. The unique ID of the test or container, e.g. '[engine:junit-jupiter]/[class:my.pack.MyClassTest]'. The name for reporting tools, which can't show a display name, e.g. a class or method name. The kind of the test descriptor: a test, a container of tests, or both.