# ONNX018: missing-value-type

**Code:** `ONNX018`

**Name:** `missing-value-type`

**Severity:** info

**Category:** spec

**Target:** value

**Fixable:** No

**Enabled by default:** No (use `--select ONNX018` to enable)

## Message

Value has no type annotation.

## Suggestion

Run shape inference or set the type manually, e.g. `value.type = ir.TensorType(ir.DataType.FLOAT)`.

## Details

Values should have type annotations for shape inference and runtime
compatibility checks. Missing types on intermediate values may cause
issues with downstream tools. This rule is off by default because
intermediate values commonly lack type info before shape inference.
Use `--select ONNX018` to enable it.