---
title: uddiv3SubscriptionKey
description: The value of this attribute holds a unique, UDDIv3 identifier for a subscription entity.
component: pingds
version: 8.1
page_id: pingds:schemaref:at-uddiv3SubscriptionKey
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/at-uddiv3SubscriptionKey.html
---

# uddiv3SubscriptionKey

The value of this attribute holds a unique, UDDIv3 identifier for a subscription entity.

|                             |                                                                |
| --------------------------- | -------------------------------------------------------------- |
| *OID*                       | 1.3.6.1.1.10.4.38                                              |
| *Names*                     | uddiv3SubscriptionKey                                          |
| *Description*               | UDDIv3 Subscription unique identifier                          |
| *Syntax*                    | [DirectoryString](s-DirectoryString.html)                      |
| *Equality matching rule*    | [caseIgnoreMatch](mr-caseIgnoreMatch.html)                     |
| *Ordering matching rule*    | [caseIgnoreOrderingMatch](mr-caseIgnoreOrderingMatch.html)     |
| *Substring matching rule*   | [caseIgnoreSubstringsMatch](mr-caseIgnoreSubstringsMatch.html) |
| *Single value*              | true                                                           |
| *User modification allowed* | true                                                           |
| *Usage*                     | userApplications                                               |
| *Origin*                    | [RFC 4403](https://datatracker.ietf.org/doc/html/rfc4403)      |
| *Schema file*               | 03-uddiv3.ldif                                                 |
| *Used by*                   | [uddiv3Subscription](oc-uddiv3Subscription.html)               |