Netscape Standard SchemaChapter 3 How to Design the Schema 43sn: JensengivenName: BabsgivenName: Barbaramail: bjensen@example.comNotice that the entry for Babs contains multiple values for some of the attributes.The attribute givenName appears twice, each time with a unique value. The objectclasses that appear in this example are explained in the next section, “StandardObject Classes."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, whetherthe attribute is for the directory’s own use, the origin of the attribute, and anyadditional 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 StandardAttribute' SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )Standard Object ClassesObject classes are used to group related information. Typically, an object classrepresents a real object, such as a person or a fax machine. Before you can use anobject class and its attributes in your directory, it must be identified in the schema.Your directory recognizes a standard list of object classes by default. See theNetscape Schema Reference Guide for more information.Each directory entry belongs to one or more object classes. Once you place anobject class identified in your schema on an entry, you are telling the directoryserver that the entry can have a certain set of attribute values and must haveanother, usually smaller, set of attribute values.Object class definitions contain the following information:• A unique name• An object identifier (OID) that names the object
