https://notes.io/w2HhP
If the selectItemis not outlined for the type of the resource, and that sort helps dynamicproperties, then the property is handled as null for all situations on which itis not defined. To retrieve entity referencesinstead of the associated entities, append /$ref tothe navigation property name or type-castsegment following a navigation property name. Complex literals and assortment literals in URLs arerepresented as JSON objects and arrays in accordance with the arrayOrObjectrule in [OData-ABNF]. The conformance requirements for OData purchasers and servicesare de