DDD and reference tables

Initial conditions:

There is a bike model that has a number of fixed parameters. In addition to the initial model parameters, it should be possible to manually add new model parameters.

Situation:

Each parameter in the database is represented by the following characteristics:

• Parameter name
• Units
• Parameter value

There are several Lookup Tables in the database. Each of these tables shows the available units.

Other reference tables provide parameter names.

For each model, the name of the parameter, its value and units of measurement should be displayed on the screen.

Questions:

How best to implement a similar approach based on DDD? I do not want to complicate the domain model by dragging into it the approach used in the Database, which should not affect the model at all.

Notes:

Initially, before familiarizing myself with the database, I thought that the parameters in the model should be represented by a set of properties, for example:

// Модель велосипеда public class BikeModel { public BikeModel(string name, double height, double width) { ChangeName(name); ChangeHeight(height); ChangeWidth(width); } // Название модели велосипеда public string Name { get; private set; } // Длина велосипеда public double Height { get; private set; } // Ширина велосипеда public double Width { get; private } public void ChangeName(string name) { Name = name; } public void ChangeHeight(double height) { Height = height; } public void ChangeWidth(double width) { Width = width; } } 

However, reading the database, I realized that under the value "Parameter" hides a number of characteristics presented in the section "Situation". It turns out that the parameter can be represented by the Generic-class.

 public class ParameterOfModel<T> { public ParameterOfModel(string name, T value, string units) { SetName(name); SetValue(value); SetUnits(units); } // Название параметра public string Name { get; private set; } // Значение параметра public T Value { get; private set; } // Единицы измерения параметра public string Units { get; private set; } public void SetName(string name) { Name = name; } public void SetValue(T value) { Value = value; } public void SetUnits(string units) { Units = units; } } 

In this case, the bike model will take the following form:

  // Модель велосипеда public class BikeModel { public BikeModel(string name, double height, double width) { ChangeName(name); ChangeHeight(height); ChangeWidth(width); AdditionalNumericParams = new List<ParameterOfModel<double>>(); } // Название модели велосипеда public string Name { get; private set; } // Длина велосипеда public ParameterOfModel<double> Height { get; private set; } // Ширина велосипеда public ParameterOfModel<double> Width { get; private set; } // Дополнительные числовые параметры public List<ParameterOfModel<double>> AdditionalNumericParams { get; private set; } public void ChangeName(string name) { Name = name; } public void ChangeHeight(double height) { Height = new ParameterOfModel<double>("Высота велосипеда", height, "Сантиметры"); } public void ChangeWidth(double width) { Width = new ParameterOfModel<double>("Ширина велосипеда", width, "Сантиметры"); } // Добавить в модель дополнительный параметр public void AddNewNumericParam(ParameterOfModel<double> additionalParameter) { AdditionalNumericParams.Add(additionalParameter); } } 

But how to collect such a parameter using reference tables?