You can find which the entity sort Purchaser only has a few properties, even though it's got OpenType="true" attribute. Given that OData $select won't go over a handful of sophisticated queries I would like, I suppose I'll stick with static DTO and forbid $choose functions in the slightest degree. In https://kingswoodhomes.uk.com/news/kingswood-homes-site-manager-swaps-site-boots-for-dancing-shoes/