# Slot: left_object_id _The object (parent) of the source/left edge_ URI: [xodiff:left_object_id](https://w3id.org/oak/cross-ontology-diff/left_object_id) ## Inheritance * **left_object_id** [ [left_side](left_side.md) [object](object.md)] ## Applicable Classes | Name | Description | Modifies Slot | | --- | --- | --- | | [RelationalDiff](RelationalDiff.md) | A relational diff expresses the difference between an edge in one ontology, a... | no | ## Properties * Range: [EntityReference](EntityReference.md) * Required: True ## Identifier and Mapping Information ### Schema Source * from schema: https://w3id.org/oak/cross-ontology-diff ## LinkML Source
```yaml name: left_object_id description: The object (parent) of the source/left edge from_schema: https://w3id.org/oak/cross-ontology-diff rank: 1000 mixins: - left_side - object alias: left_object_id owner: RelationalDiff domain_of: - RelationalDiff range: EntityReference required: true ```