Feature (Deprecated)

What is a Feature ?

A feature hold the Product characteristics, it’s composed by a name and an unit (like”height in cm”).

The Feature can have parent / children relationship. This would help to categorize them (like “dimensions” being parent of “height in cm” and “width in cm”).

The Feature is also link to FeatureValue representing the possible value of a Feature. Those FeatureValue are linked to the Product itself. This design will help to compare Product features.

Example

Considering two products A & B with the following feature:

• Dimensions
  • height in cm
  • width in cm
• Weight in gram

The Product A will have the following Feature values:

• 20 linked to the Feature “height in cm”
• 5 linked to the Feature “width in cm”
• 80 linked to the Feature “Weight in gram”

The Product B will have the following Feature values:

• 20 linked to the Feature “height in cm”
• 16 linked to the Feature “width in cm”
• 75 linked to the Feature “Weight in gram”

Creating a comparison table will simply consist of putting in row the feature name and in column the product. Then we could filled the cells with the FeatureValue.

Main Attributes (not exhaustive)

• id (int)
• name (string): The feature name

Relationships

• values: a list of FeatureValue.
• site: The site it belong to
• parents: a list of Feature which represents all the parents. The association class FeatureLink used to handle to ordering of children by parent.
• children: an ordered list of Feature which represents all the children. The association class FeatureLink is used to handle to ordering of children by parent.

Cascade Operations

• Remove the Feature will:
  • Remove the association class FeatureLink but not the associated parents / children.
  • Remove the association class FeatureLink but not the associated parents / children.