Creating Existence Constraints for Node Properties

Depending on your application needs, you may want to ensure that some nodesA vertex in a graph. In a property graph it can carry labels and properties. with a given labelA tag on a node that groups it with other nodes of the same kind. A node can carry more than one. always have a particular propertyA named value stored on a node or a relationship.. For example, a Person node must have a name property. The name need not be unique for all Person nodes, but the application does not permit a Person node without a name property.

Existence constraintsA 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.