Recommendation 10. Names of UML elements should combine multiple words as needed to form precise and understandable names without using any intervening characters (such as “_”, “-”or space).
Recommendation 11. For UML attributes and operation names, association roles and parameters, capitalize only the first letter of each word after the first word that is combined in a name. Capitalize the first letter of the first word for each name of a class, package, type specification and association names.