computed properties


Is there a capability in any graph database system or query language to implement a computed property, i.e., a function/method that computes the value of a property based on other properties of the node or edge, or other nodes/edges in the datbase?

This would be much like a function method in object-oriented languages.  Rather than storing a value, the database would store the logic required to compute the value at any time.

Thank you,

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