In fact, this feature request wouldn't have to be more than a setNodeId(long id) and getNodeId() method on RelationshipType. This would eliminate the need to look up additional relationship type information through the Lucene Index. Niels
> From: [email protected] > To: [email protected] > Date: Mon, 18 Jul 2011 15:10:25 +0200 > Subject: [Neo4j] Reification of RelationshipType > > > In another thread today, I defended the schemaless nature of Neo4J, however I > believe there is one area where Neo4J has some sense of schema, which could > use some improvement in my opinion, the RelationshipType. > Whenever creating a typing layer on top of Neo4J, some duplication of > functionality will be introduced with regard to RelationshipTypes. > There is the RelationshipType in core, which is basically a name, > and there will be a node in the typing layer, which will represent that same > RelationshipType as a node. > Linking these two RelationshipTypes needs to be done by means of the Lucene > index, which is not necessarily the fastest operation. > Would it be possible to reify the RelationshipType as a node in core, so > relationshiptypes can be traversed. Different typing layers can then use that > node to add additional information to the relationship (for example stating > the transitivity, symmetry, reflexivity of the relationship, or whether the > relationship is functional, injective or one-to-one, or the domain and range > of the relationship). > Different typing layers may implement the relationshiptype differently, but > having a node to attach this information to would suffice for all possible > scenarios. > The creation of a RelationshipType-node, can even be done lazy, > so Neo4J users that don't need a RelationshipType-node won't be bothered with > additional nodes in the database. > Niels > > > _______________________________________________ > Neo4j mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
