Supportedcontrol; Supportedextension - Netscape DIRECTORY SERVER 6.0 - SCHEMA Reference

For example:
subschemaSubentry: cn=schema
This attribute is defined in RFC 2252.
Syntax
DN, single-valued.
OID
2.5.18.10

supportedControl

Definition
The values of this attribute are the object identifiers (OIDs) that identify the
controls supported by the server. When the server does not support controls, this
attribute is absent.
This attribute is defined in RFC 2252.
Syntax
DirectoryString, multi-valued.
OID
1.3.6.1.4.1.1466.101.120.13

supportedExtension

Definition
The values of this attribute are the object identifiers (OIDs) that identify the
supported extended operations supported by the server. When the server does not
support extensions, this attribute is absent.
This attribute is defined in RFC 2252.
Syntax
DirectoryString, multi-valued.
OID
1.3.6.1.4.1.1466.101.120.7
Chapter 4 Operational Attributes, Special Attributes, and Special Object Classes
Operational Attributes
133