---
title: groupOfUniqueNames
description: Represents a set of named objects, like groupOfNames, including information relating to the purpose or maintenance of the set. Object names are not repeated or reassigned within the set.
component: pingds
version: 8.1
page_id: pingds:schemaref:oc-groupOfUniqueNames
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/oc-groupOfUniqueNames.html
---

# groupOfUniqueNames

Represents a set of named objects, like `groupOfNames`, including information relating to the purpose or maintenance of the set. Object names are not repeated or reassigned within the set.

Use this object class **only for group entries**. Directory servers cache group entries based on their object class; adding this object class to non-group entries fills the group cache with spurious entries. This hurts overall group-related performance and performance for the non-group entries incorrectly identified as groups.

|                       |                                                                                                                                                                                                              |
| --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| *OID*                 | 2.5.6.17                                                                                                                                                                                                     |
| *Names*               | groupOfUniqueNames                                                                                                                                                                                           |
| *Superior classes*    | [top](oc-top.html)                                                                                                                                                                                           |
| *Class type*          | STRUCTURAL: for structural specification of the DIT. Entries have only one structural object class superclass chain.                                                                                         |
| *Required attributes* | [cn](at-cn.html), [objectClass](at-objectClass.html)                                                                                                                                                         |
| *Optional attributes* | [businessCategory](at-businessCategory.html), [description](at-description.html), [o](at-o.html), [ou](at-ou.html), [owner](at-owner.html), [seeAlso](at-seeAlso.html), [uniqueMember](at-uniqueMember.html) |
| *Origin*              | [RFC 4519](https://datatracker.ietf.org/doc/html/rfc4519)                                                                                                                                                    |
| *Schema file*         | 00-core.ldif                                                                                                                                                                                                 |