Configuring Models

Create or open the text file for customized properties. For more information, see Editing Properties Using MQL.
To set the maximum number of alphanumeric characters that can be used for the Product Prefix attribute defined for a model and inherited by those products and product configurations related to that model, follow these steps:
1. Add or edit this line in the file used to import properties into a page object:
```
emxProductLine.Model.ProductPrefixLength=3
```
2. Set the value to a whole number.
To configure which attributes, basics, and relationships are copied from a product to a model when the product is created, follow these steps:
1. Add or edit these lines in the file used to import properties into a page object:
```
emxProduct.Product.CopyToModel.Attributes = attribute_MarketingName,attribute_DisplayText
emxProduct.Product.CopyToModel.Basics = description
emxProduct.Product.CopyToModel.Relationships = relationship_DesignResponsibility
```
2. Add, edit, or remove values from these properties as needed for your business processes. When entering attributes or relationships, use the symbolic name.
  When a user creates a product without being in the context of a model, Product Line Management automatically creates the associated model and copies the values indicated by these properties from the product (where the user enters the information) to the model (that is automatically created for the user).
When you are finished updating the text file with all properties that you want to modify, use the text file to modify the emxProductLine.properties page object. For more information, see Editing Properties Using MQL.