It can be daunting to get started with OWL 2, the Web Ontology Language. A good place to start is the OWL 2 Web Ontology Language Primer. However, for people familiar with UML class diagrams it may be helpful to know how UML class diagrams can be translated into OWL. For this purpose I have prepared the UML Class Diagram to OWL and SROIQ Reference. It also includes the SROIQ description logic translations. Enjoy!