Triples in DQL

A mutation that adds triples is done with the set keyword.

{
  set {
    # triples in here
  }
}

The input language is triples in the W3C standard RDF N-Quad format.

Each triple has the form

<subject> <predicate> <object> .

Meaning that the graph node identified by subject is linked to object with directed edge predicate. Each triple ends with a period. The subject of a triple is always a node in the graph, while the object may be a node or a value (a literal).

For example, the triple

<0x01> <name> "Alice" .
<0x01> <dgraph.type> "Person" .

Represents that graph node with ID 0x01 has a name with string value "Alice". While triple

<0x01> <friend> <0x02> .

Represents that graph node with ID 0x01 is linked with the friend edge to node 0x02.

Dgraph creates a unique 64 bit identifier for every blank node in the mutation - the node’s UID. A mutation can include a blank node as an identifier for the subject or object, or a known UID from a previous mutation.