Associations mean relationship between the logical units or as we call it in the Projection “Entities”. This is required when the user wants to filter the records of the Custom Logical Unit in relation to the Configuring Projection. This is the typical master detail scenario user finds in the application.
In a master details relationship if a list is added to filter out the records depending on Parent Child relationship, then needs to refer to the selector and load the data set.
In below scenario, Person records will be filtered in the added List depending on the selected record in the PersonInfo Selector in the Person Page. User can add data to any “Person” record. But if its required to filter the records to the current “Person” record user is in, then user needs to create a binding between the list and the “Person” Record currently shows in the page. For this Entity Associations can be used. Person Info Selector is the main element which picks up the records for the “Person” Page and all the other elements are based on that.