HP UX Direry Server 3.2.2 Standard attributes, , and, , and, givenName, commonName, •A unique name, cn: Babs Jensen, ) and the allowed attributes, ), a description of the class

objectclasses: ( 2.5.6.6 NAME 'person' DESC 'Standard Person Object Class' SUP top

MUST (objectclass $ sn $ cn) MAY (description $ seeAlso $ tele\ phoneNumber $ userPassword)

X-ORIGIN 'RFC 2252' )

This schema entry states the object identifier, or OID, for the class (2.5.6.6), the name of the object class (person), a description of the class (Standard Person), then lists the required attributes (objectclass, sn, and cn) and the allowed attributes (description, seeAlso, telephoneNumber, and userPassword).

For more information about the LDAPv3 schema format, see the LDAPv3 Attribute Syntax Definitions document, RFC 2252, and other standard schema definitions in RFC 247, RFC 2927, and RFC 2307. All these schema elements are supported in HP-UX Directory Server.

3.2.2 Standard attributes

Attributes contain specific data elements such as a name or a fax number. Directory Server represents data as attribute-data pairs, a descriptive schema attribute associated with a specific piece of information. These are also called attribute-value assertions or AVAs.

For example, the directory can store a piece of data such as a person's name in a pair with the standard attribute, in this case commonName (cn). So, an entry for a person named Babs Jensen has the attribute-data pair cn: Babs Jensen.

In fact, the entire entry is represented as a series of attribute-data pairs. The entire entry for Babs Jensen is as follows:

dn: uid=bjensen, ou=people, dc=example, dc=com

objectClass: top

objectClass: person

objectClass: organizationalPerson

objectClass: inetOrgPerson

cn: Babs Jensen

sn: Jensen

givenName: Babs

givenName: Barbara

mail: bjensen@example.com

The entry for Babs Jensen contains multiple values for some of the attributes. The givenName attribute appears twice, each time with a unique value.

In the schema, each attribute definition contains the following information:•A unique name.•An object identifier (OID) for the attribute.•A text description of the attribute.•The OID of the attribute syntax.

•Indications of whether the attribute is single-valued or multi-valued, whether the attribute is for the directory's own use, the origin of the attribute, and any additional matching rules associated with the attribute.

For example, the cn attribute definition appears in the schema as follows:

attributetypes: ( 2.5.4.3 NAME 'cn' DESC 'commonName Standard Attribute' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )

The attribute's syntax defines the format of the values which the attribute allows. In a way, the syntax helps define the kind of information that can be stored in the attribute. The Directory Server supports all standard attribute syntaxes.

28 Designing the directory schema