14.2. Template Concepts
14.2.1. RDF Queries and Unification
The XUL template system is a query system. It searches through data and returns the items that match the search specification. The data searched through is a set of RDF facts. A template query is therefore an RDF-specific piece of processing.
The queries that XUL templates do are often described as a pattern-matching system. In the most general computer science sense, this is true, but pattern matching also has a simple, everyday meaning. That everyday meaning is ...