Metadata through Meta Facility can be in arbitrary structures, both predictable structures and dynamicly varying structures. No matter how metadata structures change, they are always fully accessable through the combination of XPath and the Meta interface.
Predefined structure of metadata. Can be inquiried with static XPath expressions.
Unpredictable structure of metadata. Node names vary at runtime, or nest for arbitrary levels. Can be enumerated through instances of Meta class.
When you have trouble with your metadata or accessing program, there are some basic diagnostics from Meta Facility to help you out.
