Data model

What is a data model?

Data model in the Eximee platform is a central element that describes the business data structure used in the low-code application. The model serves two functions

• documentary, providing unambiguous information about the source of each field's value

• technical, performing operations necessary to obtain values

The data model allows modeling of the data structure in a tree structure. Each node of the tree represents a business domain object of the application, e.g. applicant, loan or correspondence address. Each leaf of the tree denotes a single field storing a specific value.

Each model field has a specified method of obtaining the value (so-called "data source"). Sources can compute data locally, based on constant default values, algorithms implemented in ScriptCode (e.g. PageService, ServiceTask, ...) and data entered manually by users (e.g. on fields in a loan application or in a credit analyst's task). Values can also be obtained remotely from services via REST API.

The data described in the model is stored in many places, not necessarily in Eximee platform components. The task of the data model is to fetch the values for each field from the specified location at the appropriate time. It is therefore a component coordinating data retrieval, not just storing it.

Each low-code application has its own data model definition. There is no need to create one common "mega-model" covering all areas of the institution. The data model exists only in the context of the running application and is not global for the entire platform. This means that a separate instance of the data model is created for each running application (see Storing data in the model)

A good data model can significantly ease maintenance and development of the application. The ability to quickly verify the source of a given value is key when analyzing issues and when planning developmental changes in the application. Remember clear names for objects and fields, concrete documentation in descriptions, and updating the model definition!