Schema Backend
The Schema Backend provides access to the directory server schema information, including the attribute types, object classes, attribute syntaxes, matching rules, matching rule uses, DIT content rules, and DIT structure rules that it contains.
The server allows "modify" operations in this backend to alter the server schema definitions. The configuration entry for this backend is based on the ds-cfg-schema-backend structural object class. Note that any attribute types included in this entry that are not included in this object class (or the parent ds-cfg-backend class) appears directly in the schema entry.
Parent
The Schema Backend object inherits from Local Backend.
Schema Backend Properties
You can use configuration expressions to set property values at startup time. For details, see Property Value Substitution.
| Basic Properties | Advanced Properties |
|---|---|
backend-id
Synopsis |
Specifies a name to identify the associated backend. |
Description |
The name must be unique among all backends in the server. The backend ID may not be altered after the backend is created in the server. |
Default Value |
None |
Allowed Values |
A string. |
Multi-valued |
No |
Required |
Yes |
Admin Action Required |
None |
Advanced |
No |
Read-Only |
Yes |
enabled
Synopsis |
Indicates whether the backend is enabled in the server. |
Description |
If a backend is not enabled, then its contents are not accessible when processing operations. |
Default Value |
None |
Allowed Values |
true false |
Multi-valued |
No |
Required |
Yes |
Admin Action Required |
None |
Advanced |
No |
Read-Only |
No |
show-all-attributes
Synopsis |
Indicates whether to treat all attributes in the schema entry as if they were user attributes regardless of their configuration. |
Description |
This may provide compatibility with some applications that expect schema attributes like attributeTypes and objectClasses to be included by default even if they are not requested. Note that the ldapSyntaxes attribute is always treated as operational in order to avoid problems with attempts to modify the schema over protocol. |
Default Value |
None |
Allowed Values |
true false |
Multi-valued |
No |
Required |
Yes |
Admin Action Required |
None |
Advanced |
No |
Read-Only |
No |
writability-mode
Synopsis |
Specifies the behavior that the backend should use when processing write operations. |
Default Value |
enabled |
Allowed Values |
|
Multi-valued |
No |
Required |
Yes |
Admin Action Required |
None |
Advanced |
No |
Read-Only |
No |
Advanced Properties
Use the --advanced
option to access advanced properties.
java-class
Synopsis |
Specifies the fully-qualified name of the Java class that provides the backend implementation. |
Default Value |
org.opends.server.backends.SchemaBackend |
Allowed Values |
A Java class that extends or implements:
|
Multi-valued |
No |
Required |
Yes |
Admin Action Required |
The object must be disabled and re-enabled for changes to take effect. |
Advanced |
Yes |
Read-Only |
No |
schema-entry-dn
Synopsis |
Defines the base DNs of the subtrees in which the schema information is published in addition to the value included in the base-dn property. |
Description |
The value provided in the base-dn property is the only one that appears in the subschemaSubentry operational attribute of the server’s root DSE (which is necessary because that is a single-valued attribute) and as a virtual attribute in other entries. The schema-entry-dn attribute may be used to make the schema information available in other locations to accommodate certain client applications that have been hard-coded to expect the schema to reside in a specific location. |
Default Value |
cn=schema |
Allowed Values |
A valid DN. |
Multi-valued |
Yes |
Required |
No |
Admin Action Required |
None |
Advanced |
Yes |
Read-Only |
No |