CHARACTERISTICS
 The following are descriptions of valid characteristics:

 DNA$Towers

 Specifies the DECnet/OSI address of every node at which the object
 entry may be found. This attribute is used only by DECnet/OSI nodes
 and servers.

 DNS$ACS

 Specifies the access control set for the object entry.

 DNS$Address

 Specifies the DECnet Phase IV address of every node at which the
 object entry may be found. This attribute is used only by Phase IV
 nodes and servers.

 DNS$Class

 Classifies objects according to the type of object being named.
 Client application programs can define their own classes for object
 entries that their application creates.

 DNS$ClassVersion

 Allows the definition of an object class to be evolved over time
 (for example, by changing the definition of the class-specific
 attributes) without confusing the clients of the DECdns directory
 service.

 DNS$CTS

 Specifies the creation timestamp of this object.

 DNS$ObjectUID

 Specifies the unique identifier (UID) associated with the object
 entry. This attribute is optional and, if present, its value can
 be null. Clients are responsible for maintaining the UIDs of object
 entries that they are using; DECdns does not ensure that object
 entry UIDs are valid or unique.

 DNS$UTS

 Specifies the timestamp of the most recent update to an attribute of
 the object entry.

 In addition, application-specific attributes may exist for an object
 entry. See your application programmer for a list of application-
 defined attributes.