Enforcing Schema - Limiting edge label to 2 types of vertex labels

[Adam]

I'm working on my first Titan Graph implementation, but ran into an issue with enforcing the schema. Here's my set up:

Configuration conf = new BaseConfiguration(); 

conf.setProperty("storage.backend", "cassandra"); 
conf.setProperty("storage.hostname", "127.0.0.1"); 
conf.setProperty("index.search.backend", "elasticsearch"); 
conf.setProperty("index.search.hostname", "127.0.0.1"); 
conf.setProperty("index.search.elasticsearch.client-only", "true"); 
conf.setProperty("schema.default", "none"); 

TitanGraph g = TitanFactory.open(conf); 
TitanManagement mgmt = g.getManagementSystem(); 

VertexLabel personLabel = mgmt.makeVertexLabel("person").make(); 
VertexLabel locationLabel = mgmt.makeVertexLabel("location").make(); 
VertexLabel organizationLabel = mgmt.makeVertexLabel("organization").make(); 

mgmt.makeEdgeLabel("lives in").multiplicity(Multiplicity.MANY2ONE).make(); 

mgmt.commit(); 
g.shutdown();

I want to enforce that a "lives in" edge can ONLY occur from a "person" to a "location", but I can't find the logic to do it.

[Daniel Kuppitz]

That kind of constraint has to be handled by your application.

Cheers,

Daniel