---
title: dc
description: Domain component as described in RFC 1274, where each attribute value holds one component, or label, of a DNS domain name. A value of this attribute is a string of ASCII characters following this ABNF:
component: pingds
version: 8.1
page_id: pingds:schemaref:at-dc
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/at-dc.html
---

# dc

Domain component as described in RFC 1274, where each attribute value holds one component, or label, of a DNS domain name. A value of this attribute is a string of ASCII characters following this ABNF:

```
label = (ALPHA / DIGIT) [*61(ALPHA / DIGIT / HYPHEN) (ALPHA / DIGIT)]
ALPHA   = %x41-5A / %x61-7A     ; "A"-"Z" / "a"-"z"
DIGIT   = %x30-39               ; "0"-"9"
HYPHEN  = %x2D                  ; hyphen ("-")
```

Examples: `example`, `com` (but not `example.com`)

|                             |                                                                                                                                                                            |
| --------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| *OID*                       | 0.9.2342.19200300.100.1.25                                                                                                                                                 |
| *Names*                     | dc, domainComponent                                                                                                                                                        |
| *Syntax*                    | [IA5String](s-IA5String.html)                                                                                                                                              |
| *Equality matching rule*    | [caseIgnoreIA5Match](mr-caseIgnoreIA5Match.html)                                                                                                                           |
| *Ordering matching rule*    | [caseIgnoreOrderingMatch](mr-caseIgnoreOrderingMatch.html)                                                                                                                 |
| *Substring matching rule*   | [caseIgnoreIA5SubstringsMatch](mr-caseIgnoreIA5SubstringsMatch.html)                                                                                                       |
| *Single value*              | true                                                                                                                                                                       |
| *User modification allowed* | true                                                                                                                                                                       |
| *Usage*                     | userApplications                                                                                                                                                           |
| *Origin*                    | [RFC 4519](https://datatracker.ietf.org/doc/html/rfc4519)                                                                                                                  |
| *Schema file*               | 00-core.ldif                                                                                                                                                               |
| *Used by*                   | [dNSDomain](oc-dNSDomain.html), [dcObject](oc-dcObject.html), [domain](oc-domain.html), [rFC822LocalPart](oc-rFC822LocalPart.html), [untypedObject](oc-untypedObject.html) |