# ONNX015: missing-opset-for-domain

**Code:** `ONNX015`

**Name:** `missing-opset-for-domain`

**Severity:** error

**Category:** spec

**Target:** node

**Fixable:** No

## Message

No opset imported for the node's operator domain.

## Suggestion

Add an opset_import for the node's domain to the model.

## Details

Every node's operator domain must have a corresponding opset_import
in the model. Without it, the runtime cannot determine which version
of the operator to use.