7.11. Usage Example

Consider how one might define a conceptual table and its subordinates. (This example uses the RowStatus textual convention defined in [3].)

evalSlot OBJECT-TYPE
    SYNTAX      INTEGER
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
            "The index number of the first unassigned entry in the
            evaluation table.

            A management station should create new entries in the
            evaluation table using this algorithm:  first, issue a
            management protocol retrieval operation to determine the
            value of evalSlot; and, second, issue a management protocol
            set operation to create an instance of the evalStatus object
            setting its value to createAndGo(4) or createAndWait(5).  If
            this latter operation succeeds, then the management station
            may continue modifying the instances corresponding to the
            newly created conceptual row, without fear of collision with
            other management stations."
    ::= { eval 1 }

evalTable OBJECT-TYPE
    SYNTAX      SEQUENCE OF EvalEntry
    MAX-ACCESS  not-accessible
    STATUS      current
    DESCRIPTION
            "The (conceptual) evaluation table."
    ::= { eval 2 }

evalEntry OBJECT-TYPE
    SYNTAX      EvalEntry
    MAX-ACCESS  not-accessible
    STATUS      current
    DESCRIPTION
            "An entry (conceptual row) in the evaluation table."
    INDEX   { evalIndex }
    ::= { evalTable 1 }

EvalEntry ::=
    SEQUENCE {
        evalIndex       Integer32,
        evalString      DisplayString,
        evalValue       Integer32,
        evalStatus      RowStatus
    }

evalIndex OBJECT-TYPE
    SYNTAX      Integer32
    MAX-ACCESS  not-accessible
    STATUS      current
    DESCRIPTION
            "The auxiliary variable used for identifying instances of
            the columnar objects in the evaluation table."
        ::= { evalEntry 1 }

evalString OBJECT-TYPE
    SYNTAX      DisplayString
    MAX-ACCESS  read-create
    STATUS      current
    DESCRIPTION
            "The string to evaluate."
        ::= { evalEntry 2 }

evalValue OBJECT-TYPE
    SYNTAX      Integer32
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
            "The value when evalString was last executed."
    DEFVAL  { 0 }
        ::= { evalEntry 3 }

evalStatus OBJECT-TYPE
    SYNTAX      RowStatus
    MAX-ACCESS  read-create
    STATUS      current
    DESCRIPTION
            "The status column used for creating, modifying, and
            deleting instances of the columnar objects in the evaluation
            table."
    DEFVAL  { active }
        ::= { evalEntry 4 }