Clarify OQL works for persistable and view entities.

Author: MarkvanMents

content/en/docs/refguide/modeling/domain-model/oql/_index.md

@@ -11,7 +11,7 @@ The Mendix Object Query Language (OQL) is a relational query language inspired b
 In addition, OQL can use predefined relations (associations) to easily join objects without having to calculate which columns should be coupled. Despite these differences, many SQL keywords also work in OQL.
 
 {{% alert color="info" %}}
-OQL can only be used on persistable entities and the associations between them. It cannot be used to reference non-persistable, external, or view [entities](/refguide/entities/). 
+OQL can only be used on persistable and view entities and the associations between them. It cannot be used with non-persistable or view [entities](/refguide/entities/). 
 {{% /alert %}}
 
 Some examples of OQL queries are: