The Enum-attribute constructionWorkType in class ConstructionWorks is optional, but it is the only attribute in this class.
It should be considered to change it to mandatory, as it does not make any sense to omit it.
(Furthermore, this enumeration has got a general literal named "construcionWorks", i.e. there is no need to submit an empty class to keep information general).
Effects Part 3.
I took it into EN review.
Fixed in enquiry input version