> ## Documentation Index
> Fetch the complete documentation index at: https://projectdiscovery-nuclei-syntax-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Nuclei schema defs rule properties type of rule

# type of rule Schema

```txt
https://template#/$defs/Rule/properties/type
```

Type of fuzzing rule to perform

| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                             |
| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :------------------------------------------------------------------------------------- |
| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [nuclei-schema.schema.json\*](../out/nuclei-schema.schema.json "open original schema") |

## type Type

`string` ([type of rule](nuclei-schema-defs-rule-properties-type-of-rule))

## type Constraints

**enum**: the value of this property must be equal to one of the following values:

| Value             | Explanation |
| :---------------- | :---------- |
| `"replace"`       |             |
| `"prefix"`        |             |
| `"postfix"`       |             |
| `"infix"`         |             |
| `"replace-regex"` |             |