---
title: dITStructureRules
description: This operational attribute used in LDAP schema defines DIT structure rules, which specify the names entries may have, and how entries may be related to each other.
component: pingds
version: 8.1
page_id: pingds:schemaref:at-dITStructureRules
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/at-dITStructureRules.html
---

# dITStructureRules

This operational attribute used in LDAP schema defines DIT structure rules, which specify the names entries may have, and how entries may be related to each other.

|                             |                                                                   |
| --------------------------- | ----------------------------------------------------------------- |
| *OID*                       | 2.5.21.1                                                          |
| *Names*                     | dITStructureRules                                                 |
| *Syntax*                    | [DITStructureRuleDescription](s-DITStructureRuleDescription.html) |
| *Equality matching rule*    | [integerFirstComponentMatch](mr-integerFirstComponentMatch.html)  |
| *Single value*              | false: multiple values allowed                                    |
| *User modification allowed* | true                                                              |
| *Usage*                     | directoryOperation                                                |
| *Origin*                    | [RFC 4512](https://datatracker.ietf.org/doc/html/rfc4512)         |
| *Schema file*               | 00-core.ldif                                                      |
| *Used by*                   | [subschema](oc-subschema.html)                                    |