Creating Existence Constraints on Relationship Properties
You may want to ensure that some iFull definition for relationship (opens in a new tab)A named, directed connection between two nodes. Every relationship has a type, a start node and an end node. types always have a particular iFull definition for property (opens in a new tab)A named value stored on a node or a relationship..
For example, a RATED relationship must have a property, rating.
Existence iFull definition for constraint (opens in a new tab)A rule the database enforces on every node or relationship with a given label or type, rejecting any write that breaks it. are only available in Enterprise Edition.
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