Category Facet Inheritance conflicts can occur when multiple categories in the inheritance chain have facet rules on the same attribute. Details about Facet Inheritance conflict resolution are provided below:
Facet rules are applied as a union.
If multiple categories in an inheritance chain have facet rules on the same attribute, priority is given to the customisations from the nearest node. Priority is as follows:
Facet rules set at a node have priority over inherited facet rules.
Facet rules inherited from parent nodes have priority based on distance to the specified node.
Nodes do not inherit from a parent with Pass Down = No, but they can inherit from ancestors with Pass Down = Yes.
Nodes do not inherit anything if a parent node has Pass Down = No and Pass Through = No, even if there are ancestors with Pass Through = Yes.
Nodes that have Receive From = Yes and a parent node with Receive From = No can still inherit from higher level nodes.
<br>
## Multiple parents
If a category has multiple parents, then it will attempt to inherit all facet customisations from parents with Pass Down = On. Facet inheritance from multiple parents follows these rules:
If possible, merge all rules as a union.
For example, if parent 1 has a boost rule for Price and parent 2 has a boost rule for Brand, then the child has boost rules for Price and Brand.
Local customisations take priority over inherited customisations.
For example, if parent 1 has a boost rule for Price and the child has a bury rule for Price, then the child has a bury rule for Price.
Parents that are closer to the child category have higher priority than other parents.
For example, suppose parent 1 is one level away from the child and has a boost rule for Price, and parent 2 is two levels away from the child and has a bury rule for Price. The child will have a boost rule for Price since parent 1 is closer to the child.
If conflicts cannot be resolved by any of the above rules, then the parent with the most recent updates (that is, the latest saved/edited timestamp) will have priority.
You can also select a single parent to inherit from, which will limit inheritance to that parent’s category path. See [Multiple Parents Conflict](🔗) for details.
Refer to [Use Case 5](🔗) for an example of inheritance from multiple parents.