---
title: Role mapping resource properties
description: A role mapping resource has the following properties: The field rule is the primary building block for a role mapping expression. It takes a single object...
url: https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4232/deploy-manage/users-roles/cluster-or-deployment-auth/role-mapping-resources
products:
  - Elasticsearch
---

# Role mapping resource properties
A role mapping resource has the following properties:
<definitions>
  <definition term="enabled">
    (Boolean)  Mappings that have `enabled` set to `false` are ignored when role mapping is performed.
  </definition>
  <definition term="metadata">
    (object) Additional metadata that helps define which roles are assigned to each user. Within the `metadata` object, keys beginning with `_` are reserved for system usage.
  </definition>
  <definition term="roles">
    (list) A list of roles that are granted to the users that match the role mapping rules.
  </definition>
  <definition term="rules">
    (object) The rules that determine which users should be matched by the mapping. A rule is a logical condition that is expressed by using a JSON DSL. The DSL supports the following rule types:
    <definitions>
      <definition term="any">
        (array of rules) If **any** of its children are true, it evaluates to `true`.
      </definition>
      <definition term="all">
        (array of rules) If **all** of its children are true, it evaluates to `true`.
      </definition>
      <definition term="field">
        (object) See [Field rules](#mapping-roles-rule-field).
      </definition>
      <definition term="except">
        (object) A single rule as an object. Only valid as a child of an `all` rule. If its child is `false`, the `except` is `true`.
      </definition>
    </definitions>
  </definition>
</definitions>


## Field rules

The `field` rule is the primary building block for a role mapping expression. It takes a single object as its value and that object must contain a single member with key *F* and value *V*. The field rule looks up the value of *F* within the user object and then tests whether the user value *matches* the provided value *V*.
The value specified in the field rule can be one of the following types:

| Type               | Description                                                                                                                                                                                                   | Example                 |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|
| Simple String      | Exactly matches the provided value.                                                                                                                                                                           | `"esadmin"`             |
| Wildcard String    | Matches the provided value using a wildcard.                                                                                                                                                                  | `"*,dc=example,dc=com"` |
| Regular Expression | Matches the provided value using a                       [Lucene regexp](https://docs-v3-preview.elastic.dev/elastic/elasticsearch/tree/main/reference/query-languages/query-dsl/regexp-syntax)Lucene regexp. | `"/.*-admin[0-9]*/"`    |
| Number             | Matches an equivalent numerical value.                                                                                                                                                                        | `7`                     |
| Null               | Matches a null or missing value.                                                                                                                                                                              | `null`                  |
| Array              | Tests each element in the array in                      accordance with the above definitions.                      If *any*any of elements match, the match is successful.                                   | `["admin", "operator"]` |


### User fields

The *user object* against which rules are evaluated has the following fields:
<definitions>
  <definition term="username">
    (string) The username by which the Elasticsearch security features knows this user. For example, `"username": "jsmith"`.
  </definition>
  <definition term="dn">
    (string) The *Distinguished Name* of the user. For example, `"dn": "cn=jsmith,ou=users,dc=example,dc=com",`.
  </definition>
  <definition term="groups">
    (array of strings) The groups to which the user belongs. For example, `"groups" : [ "cn=admin,ou=groups,dc=example,dc=com","cn=esusers,ou=groups,dc=example,dc=com ]`.
  </definition>
  <definition term="metadata">
    (object) Additional metadata for the user. This can include a variety of key-value pairs. When referencing metadata fields in role mapping rules, use the dot notation to specify the key within the metadata object. If the key contains special characters such as parentheses, dots, or spaces, you must escape these characters using backslashes (`\`). For example, `"metadata": { "cn": "John Smith" }`.
  </definition>
  <definition term="realm">
    (object) The realm that authenticated the user. The only field in this object is the realm name. For example, `"realm": { "name": "ldap1" }`.
  </definition>
</definitions>

The `groups` field is multi-valued; a user can belong to many groups. When a `field` rule is applied against a multi-valued field, it is considered to match if *at least one* of the member values matches. For example, the following rule matches any user who is a member of the `admin` group, regardless of any other groups they belong to:
```js
{ "field" : { "groups" : "admin" } }
```

For additional realm-specific details, see [Active Directory and LDAP realms](/elastic/docs-content/pull/4232/deploy-manage/users-roles/cluster-or-deployment-auth/mapping-users-groups-to-roles#ldap-role-mapping).