Removes a link type from the graph’s draft ontology. Deleting a type that was never declared is not an error: the acknowledgement reports deleted: false. Once the ontology is frozen this command fails with failed_precondition.engine.graph_ontology_frozen.

Successful mutations return an acknowledgement that identifies the affected target, the mutation effect, and commit facts when the operation changed stored state.

Examples

Remove a link type from the ontology.

CLI

$ strata graph create g
$ strata graph ontology define-object-type g person
$ strata graph ontology define-link-type g knows person person
$ strata graph ontology delete-link-type g knows

Wire

{"graph":"g","type":"graph_create"}
{"graph":"g","name":"person","type":"graph_define_object_type"}
{"graph":"g","name":"knows","source":"person","target":"person","type":"graph_define_link_type"}
{"graph":"g","name":"knows","type":"graph_delete_link_type"}

Parameters

Name	Type	Required	Description
graph	string	yes	Graph name.
name	string	yes	Link type name.

Plus the optional scope: branch and space (default to the session branch and the "default" space).

Returns

MutationAck<GraphOntologyDelete>.

Errors

• failed_precondition.engine.runtime_closed
• not_found.engine.branch
• invalid_argument.engine.product_space
• invalid_argument.engine.graph_name
• not_found.engine.graph
• invalid_argument.engine.graph_type_name
• failed_precondition.engine.graph_ontology_frozen

Invocation

• CLI: strata graph ontology delete-link-type
• Wire type: graph_delete_link_type