To attach a match rule to a specific entity of a data model, do the following.
In the MDM Repository tree view, open the data model to which you want to attach the match rule.
Select the entity to which you want to attach the match rule and, in the Properties view, open the Rules tab.
In the Match Rule section, select the match rule you want to attach to this data model from the drop-down list.
If needed, click Open Match Rule to open and view the details of the match rule.
In the table, map each match key to the corresponding entity element using the selection window.
In this example, the match key Productname is mapped to Product/Name.
Save your changes.
Now you need to deploy the data model Product to the MDM server to take into account the changes you have made, so that the match rule is deployed together with the data model to which it is attached.