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TEXTUAL-CONVENTION Macro

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SNMP textual conventions map to CIM-defined types.

Note

For more information about installing the provider, see Setting up the WMI SNMP Environment.

The following mapping rules apply to SNMP textual conventions:

  • The named type definition in the SYNTAX clause maps verbatim to the CIM property qualifier object_syntax.
  • Use the following table to map textual conventions when the SYNTAX clause explicitly refers to a textual convention of a SNMPv2C TEXTUAL-CONVENTION macro, or refers to an implied textual convention. The default value is always NULL.
Textual convention CIM variant type CIM qualifier
DateAndTime VT_BSTR textual_convention: DateAndTime
encoding: OCTETSTRING
object_syntax: DateAndTime
cimtype: string
Displaystring VT_BSTR textual_convention: Displaystring
encoding: OCTETSTRING
object_syntax: Displaystring
cimtype: string
MacAddress VT_BSTR textual_convention: MacAddress
encoding: OCTETSTRING
object_syntax: MacAddress
cimtype: string
PhysAddress VT_BSTR textual_convention: PhysAddress
encoding: OCTETSTRING
object_syntax: PhysAddress
cimtype: string
SnmpUDPAddress VT_BSTR textual_convention: SnmpUDPAddress
encoding: OCTETSTRING
object_syntax: SnmpUDPAddress
cimtype: string
SnmpOSIAddress VT_BSTR textual_convention: SnmpOSIAddress
encoding: OCTETSTRING
object_syntax: SnmpOSIAddress
cimtype: string
SnmpIPXAddress VT_BSTR textual_convention: SnmpIPXAddress
encoding: OCTETSTRING
object_syntax: SnmpIPXAddress
cimtype: string
  • The CIM-defined variant type and the CIM property qualifiers textual_convention, encoding, object_syntax, and cimtype map using the underlying primitive type.
  • The DISPLAY-HINT clause of the SNMPv2C TEXTUAL-CONVENTION macro maps verbatim to the CIM property qualifier display_hint. This qualifier is not generated if there is no TEXTUAL-CONVENTION macro, or the macro does not contain a DISPLAY-HINT clause.

Example Code

The following example describes an SNMPv1 textual convention.

myNamedType ::= DISPLAYSTRING (SIZE (0..127))

myNamedProperty OBJECT-TYPE
SYNTAX  myNamedType
ACCESS read-only
STATUS MANDATORY
DESCRIPTION ""

This example generates the following CIM qualifiers.

object_syntax("myNamedType"),
textual_convention("DISPLAYSTRING"),
encoding("OCTETSTRING"),
variable_length("0..127")

The following example describes an SNMPv2 textual convention.

myDisplaystring ::= TEXTUAL-CONVENTION
DISPLAY-HINT "255a"
STATUS current
DESCRIPTION "" 
SYNTAX OCTET STRING (SIZE (0..127))

myNamedProperty OBJECT-TYPE
SYNTAX  myDisplaystring
MAX-ACCESS read-only
STATUS current
DESCRIPTION ""

This example generates the following CIM qualifiers.

object_syntax("myDisplaystring"),
textual_convention("OCTETSTRING"),
encoding("OCTETSTRING"),
display_hint("255a"),
variable_length("0..127")