<?xml version="1.0" encoding="UTF-8"?>

<xsd:schema xmlns="http://www.mibexplorer.com/xsd/mibs/HC-ALARM-MIB" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:smi="http://www.mibexplorer.com/xsd/mibs/smi" xmlns:SNMPv2-SMI="http://www.mibexplorer.com/xsd/mibs/SNMPv2-SMI" xmlns:SNMPv2-CONF="http://www.mibexplorer.com/xsd/mibs/SNMPv2-CONF" xmlns:SNMPv2-TC="http://www.mibexplorer.com/xsd/mibs/SNMPv2-TC" xmlns:HCNUM-TC="http://www.mibexplorer.com/xsd/mibs/HCNUM-TC" xmlns:RMON-MIB="http://www.mibexplorer.com/xsd/mibs/RMON-MIB" xml:lang="en" elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.mibexplorer.com/xsd/mibs/HC-ALARM-MIB">
        <xsd:annotation>
                <xsd:appinfo>
                        <xsd:documentation>This module defines Remote Monitoring MIB extensions for
High Capacity Alarms.

Copyright (C) The Internet Society (2002). This version
of this MIB module is part of RFC 3434; see the RFC
itself for full legal notices.</xsd:documentation>
                </xsd:appinfo>
        </xsd:annotation>
        <xsd:import namespace="http://www.w3.org/2001/XMLSchema" schemaLocation="http://www.w3.org/2001/XMLSchema.xsd"/>
        <xsd:import namespace="http://www.mibexplorer.com/xsd/mibs/smi" schemaLocation="http://www.mibexplorer.com/xsd/mibs/smi.xsd"/>
        <xsd:import namespace="http://www.mibexplorer.com/xsd/mibs/SNMPv2-SMI" schemaLocation="http://www.mibexplorer.com/xsd/mibs/SNMPv2-SMI.xsd"/>
        <xsd:import namespace="http://www.mibexplorer.com/xsd/mibs/SNMPv2-CONF" schemaLocation="http://www.mibexplorer.com/xsd/mibs/SNMPv2-CONF.xsd"/>
        <xsd:import namespace="http://www.mibexplorer.com/xsd/mibs/SNMPv2-TC" schemaLocation="http://www.mibexplorer.com/xsd/mibs/SNMPv2-TC.xsd"/>
        <xsd:import namespace="http://www.mibexplorer.com/xsd/mibs/HCNUM-TC" schemaLocation="http://www.mibexplorer.com/xsd/mibs/HCNUM-TC.xsd"/>
        <xsd:import namespace="http://www.mibexplorer.com/xsd/mibs/RMON-MIB" schemaLocation="http://www.mibexplorer.com/xsd/mibs/RMON-MIB.xsd"/>
        <xsd:element name="snmp-data">
                <xsd:complexType>
                        <xsd:sequence>
                                <xsd:element name="context" minOccurs="0" maxOccurs="unbounded">
                                        <xsd:complexType>
                                                <xsd:sequence>
                                                        <xsd:element name="hcAlarmEntry" type="hcAlarmEntryType" minOccurs="0" maxOccurs="unbounded">
                                                                <xsd:annotation>
                                                                        <xsd:appinfo>
                                                                                <maxAccess>not-accessible</maxAccess>
                                                                                <status>current</status>
                                                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1</oid>
                                                                                <xsd:documentation>A conceptual row in the hcAlarmTable. Entries are usually
created in this table by management application action, but
may also be created by agent action as well.</xsd:documentation>
                                                                        </xsd:appinfo>
                                                                </xsd:annotation>
                                                        </xsd:element>
                                                        <xsd:element name="hcAlarmCapabilitiesObjects" minOccurs="0">
                                                                <xsd:complexType>
                                                                        <xsd:sequence>
                                                                                <xsd:element name="hcAlarmCapabilities" minOccurs="0">
                                                                                        <xsd:annotation>
                                                                                                <xsd:appinfo>
                                                                                                        <maxAccess>read-only</maxAccess>
                                                                                                        <status>current</status>
                                                                                                        <oid>1.3.6.1.2.1.16.29.1.2.1</oid>
                                                                                                        <xsd:documentation>An indication of the high capacity alarm capabilities
supported by this agent.

If the 'hcAlarmCreation' BIT is set, then this agent allows
NMS applications to create entries in the hcAlarmTable.

If the 'hcAlarmNvStorage' BIT is set, then this agent allows
entries in the hcAlarmTable which will be recreated after a
system restart, as controlled by the hcAlarmStorageType
object.</xsd:documentation>
                                                                                                </xsd:appinfo>
                                                                                        </xsd:annotation>
                                                                                        <xsd:simpleType>
                                                                                                <xsd:restriction base="xsd:NMTOKEN">
                                                                                                        <xsd:enumeration value="hcAlarmCreation">
                                                                                                                <xsd:annotation>
                                                                                                                        <xsd:appinfo>
                                                                                                                                <intValue>0</intValue>
                                                                                                                        </xsd:appinfo>
                                                                                                                </xsd:annotation>
                                                                                                        </xsd:enumeration>
                                                                                                        <xsd:enumeration value="hcAlarmNvStorage">
                                                                                                                <xsd:annotation>
                                                                                                                        <xsd:appinfo>
                                                                                                                                <intValue>1</intValue>
                                                                                                                        </xsd:appinfo>
                                                                                                                </xsd:annotation>
                                                                                                        </xsd:enumeration>
                                                                                                </xsd:restriction>
                                                                                        </xsd:simpleType>
                                                                                </xsd:element>
                                                                        </xsd:sequence>
                                                                </xsd:complexType>
                                                        </xsd:element>
                                                        <xsd:element name="hcAlarmCapabilities" minOccurs="0">
                                                                <xsd:annotation>
                                                                        <xsd:appinfo>
                                                                                <maxAccess>read-only</maxAccess>
                                                                                <status>current</status>
                                                                                <oid>1.3.6.1.2.1.16.29.1.2.1</oid>
                                                                                <xsd:documentation>An indication of the high capacity alarm capabilities
supported by this agent.

If the 'hcAlarmCreation' BIT is set, then this agent allows
NMS applications to create entries in the hcAlarmTable.

If the 'hcAlarmNvStorage' BIT is set, then this agent allows
entries in the hcAlarmTable which will be recreated after a
system restart, as controlled by the hcAlarmStorageType
object.</xsd:documentation>
                                                                        </xsd:appinfo>
                                                                </xsd:annotation>
                                                                <xsd:simpleType>
                                                                        <xsd:restriction base="xsd:NMTOKEN">
                                                                                <xsd:enumeration value="hcAlarmCreation">
                                                                                        <xsd:annotation>
                                                                                                <xsd:appinfo>
                                                                                                        <intValue>0</intValue>
                                                                                                </xsd:appinfo>
                                                                                        </xsd:annotation>
                                                                                </xsd:enumeration>
                                                                                <xsd:enumeration value="hcAlarmNvStorage">
                                                                                        <xsd:annotation>
                                                                                                <xsd:appinfo>
                                                                                                        <intValue>1</intValue>
                                                                                                </xsd:appinfo>
                                                                                        </xsd:annotation>
                                                                                </xsd:enumeration>
                                                                        </xsd:restriction>
                                                                </xsd:simpleType>
                                                        </xsd:element>
                                                </xsd:sequence>
                                                <xsd:attribute name="agent" type="xsd:NMTOKEN" use="required"/>
                                                <xsd:attribute name="port" type="xsd:integer" use="required"/>
                                        </xsd:complexType>
                                </xsd:element>
                        </xsd:sequence>
                </xsd:complexType>
        </xsd:element>
        <xsd:complexType name="hcAlarmEntryType">
                <xsd:sequence>
                        <xsd:element name="hcAlarmInterval" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.2</oid>
                                                <units>"seconds"</units>
                                                <xsd:documentation>The interval in seconds over which the data is sampled and
compared with the rising and falling thresholds.  When
setting this variable, care should be taken in the case of
deltaValue sampling - the interval should be set short
enough that the sampled variable is very unlikely to
increase or decrease by more than 2^63 - 1 during a single
sampling interval.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:union>
                                                <xsd:simpleType>
                                                        <xsd:restriction base="xsd:int">
                                                                <xsd:minInclusive value="1"/>
                                                                <xsd:maxInclusive value="2147483647"/>
                                                        </xsd:restriction>
                                                </xsd:simpleType>
                                        </xsd:union>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmVariable" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.3</oid>
                                                <xsd:documentation>The object identifier of the particular variable to be
sampled.  Only variables that resolve to an ASN.1 primitive
type of INTEGER (INTEGER, Integer32, Counter32, Counter64,
Gauge, or TimeTicks) may be sampled.

Because SNMP access control is articulated entirely in terms
of the contents of MIB views, no access control mechanism
exists that can restrict the value of this object to
identify only those objects that exist in a particular MIB
view.  Because there is thus no acceptable means of
restricting the read access that could be obtained through
the alarm mechanism, the probe must only grant write access
to this object in those views that have read access to all
objects on the probe.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType name="VariablePointer">
                                        <xsd:restriction base="smi:ObjectIdentifier"/>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmSampleType" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.4</oid>
                                                <xsd:documentation>The method of sampling the selected variable and
calculating the value to be compared against the thresholds.
If the value of this object is absoluteValue(1), the value
of the selected variable will be compared directly with the
thresholds at the end of the sampling interval.  If the
value of this object is deltaValue(2), the value of the
selected variable at the last sample will be subtracted from
the current value, and the difference compared with the
thresholds.

If the associated hcAlarmVariable instance could not be
obtained at the previous sample interval, then a delta
sample is not possible, and the value of the associated
hcAlarmValueStatus object for this interval will be
valueNotAvailable(1).

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:restriction base="xsd:NMTOKEN">
                                                <xsd:enumeration value="absoluteValue">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>1</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="deltaValue">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>2</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmAbsValue" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-only</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.5</oid>
                                                <xsd:documentation>The absolute value (i.e., unsigned value) of the
hcAlarmVariable statistic during the last sampling period.
The value during the current sampling period is not made
available until the period is completed.

To obtain the true value for this sampling interval, the
associated instance of hcAlarmValueStatus must be checked,
and the value of this object adjusted as necessary.

If the MIB instance could not be accessed during the
sampling interval, then this object will have a value of
zero and the associated instance of hcAlarmValueStatus will
be set to 'valueNotAvailable(1)'.</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType name="CounterBasedGauge64">
                                        <xsd:restriction base="smi:Counter64">
                                                <xsd:minInclusive value="0"/>
                                                <xsd:maxInclusive value="9223372036854775807"/>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmValueStatus" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-only</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.6</oid>
                                                <xsd:documentation>This object indicates the validity and sign of the data for
the hcAlarmAbsValue object, as described in the
HcValueStatus textual convention.</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType name="HcValueStatus">
                                        <xsd:restriction base="xsd:NMTOKEN">
                                                <xsd:enumeration value="valueNotAvailable">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>1</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="valuePositive">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>2</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="valueNegative">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>3</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmStartupAlarm" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.7</oid>
                                                <xsd:documentation>The alarm that may be sent when this entry is first set to
active.  If the first sample after this entry becomes active
is greater than or equal to the rising threshold and this
object is equal to risingAlarm(1) or
risingOrFallingAlarm(3), then a single rising alarm will be
generated.  If the first sample after this entry becomes
valid is less than or equal to the falling threshold and
this object is equal to fallingAlarm(2) or
risingOrFallingAlarm(3), then a single falling alarm will be
generated.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:restriction base="xsd:NMTOKEN">
                                                <xsd:enumeration value="risingAlarm">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>1</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="fallingAlarm">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>2</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="risingOrFallingAlarm">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>3</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmRisingThreshAbsValueLo" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.8</oid>
                                                <xsd:documentation>The lower 32 bits of the absolute value for threshold for
the sampled statistic.  The actual threshold value is
determined by the associated instances of the
hcAlarmRisingThreshAbsValueHi and
hcAlarmRisingThresholdValStatus objects, as follows:

   ABS(threshold) = hcAlarmRisingThreshAbsValueLo +
         (hcAlarmRisingThreshAbsValueHi * 2^^32)

The absolute value of the threshold is adjusted as required,
as described in the HcValueStatus textual convention.  These
three object instances are conceptually combined to
represent the rising threshold for this entry.

When the current sampled value is greater than or equal to
this threshold, and the value at the last sampling interval
was less than this threshold, a single event will be
generated.  A single event will also be generated if the
first sample after this entry becomes valid is greater than
or equal to this threshold and the associated
hcAlarmStartupAlarm is equal to risingAlarm(1) or
risingOrFallingAlarm(3).

After a rising event is generated, another such event will
not be generated until the sampled value falls below this
threshold and reaches the threshold identified by the
hcAlarmFallingThreshAbsValueLo,
hcAlarmFallingThreshAbsValueHi, and
hcAlarmFallingThresholdValStatus objects.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:restriction base="smi:Unsigned32">
                                                <xsd:minInclusive value="0"/>
                                                <xsd:maxInclusive value="4294967295"/>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmRisingThreshAbsValueHi" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.9</oid>
                                                <xsd:documentation>The upper 32 bits of the absolute value for threshold for
the sampled statistic.  The actual threshold value is
determined by the associated instances of the
hcAlarmRisingThreshAbsValueLo and
hcAlarmRisingThresholdValStatus objects, as follows:

   ABS(threshold) = hcAlarmRisingThreshAbsValueLo +
         (hcAlarmRisingThreshAbsValueHi * 2^^32)

The absolute value of the threshold is adjusted as required,
as described in the HcValueStatus textual convention.  These
three object instances are conceptually combined to
represent the rising threshold for this entry.

When the current sampled value is greater than or equal to
this threshold, and the value at the last sampling interval
was less than this threshold, a single event will be
generated.  A single event will also be generated if the
first sample after this entry becomes valid is greater than
or equal to this threshold and the associated
hcAlarmStartupAlarm is equal to risingAlarm(1) or
risingOrFallingAlarm(3).

After a rising event is generated, another such event will
not be generated until the sampled value falls below this
threshold and reaches the threshold identified by the
hcAlarmFallingThreshAbsValueLo,
hcAlarmFallingThreshAbsValueHi, and
hcAlarmFallingThresholdValStatus objects.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:restriction base="smi:Unsigned32">
                                                <xsd:minInclusive value="0"/>
                                                <xsd:maxInclusive value="4294967295"/>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmRisingThresholdValStatus" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.10</oid>
                                                <xsd:documentation>This object indicates the sign of the data for the rising
threshold, as defined by the hcAlarmRisingThresAbsValueLo
and hcAlarmRisingThresAbsValueHi objects, as described in
the HcValueStatus textual convention.

The enumeration 'valueNotAvailable(1)' is not allowed, and
the associated hcAlarmStatus object cannot be equal to
'active(1)' if this object is set to this value.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType name="HcValueStatus">
                                        <xsd:restriction base="xsd:NMTOKEN">
                                                <xsd:enumeration value="valueNotAvailable">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>1</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="valuePositive">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>2</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="valueNegative">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>3</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmFallingThreshAbsValueLo" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.11</oid>
                                                <xsd:documentation>The lower 32 bits of the absolute value for threshold for
the sampled statistic.  The actual threshold value is
determined by the associated instances of the
hcAlarmFallingThreshAbsValueHi and
hcAlarmFallingThresholdValStatus objects, as follows:

   ABS(threshold) = hcAlarmFallingThreshAbsValueLo +
         (hcAlarmFallingThreshAbsValueHi * 2^^32)

The absolute value of the threshold is adjusted as required,
as described in the HcValueStatus textual convention.  These
three object instances are conceptually combined to
represent the falling threshold for this entry.

When the current sampled value is less than or equal to this
threshold, and the value at the last sampling interval was
greater than this threshold, a single event will be
generated.  A single event will also be generated if the
first sample after this entry becomes valid is less than or
equal to this threshold and the associated
hcAlarmStartupAlarm is equal to fallingAlarm(2) or
risingOrFallingAlarm(3).

After a falling event is generated, another such event will
not be generated until the sampled value rises above this
threshold and reaches the threshold identified by the
hcAlarmRisingThreshAbsValueLo,
hcAlarmRisingThreshAbsValueHi, and
hcAlarmRisingThresholdValStatus objects.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:restriction base="smi:Unsigned32">
                                                <xsd:minInclusive value="0"/>
                                                <xsd:maxInclusive value="4294967295"/>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmFallingThreshAbsValueHi" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.12</oid>
                                                <xsd:documentation>The upper 32 bits of the absolute value for threshold for
the sampled statistic.  The actual threshold value is
determined by the associated instances of the
hcAlarmFallingThreshAbsValueLo and
hcAlarmFallingThresholdValStatus objects, as follows:

   ABS(threshold) = hcAlarmFallingThreshAbsValueLo +
         (hcAlarmFallingThreshAbsValueHi * 2^^32)

The absolute value of the threshold is adjusted as required,
as described in the HcValueStatus textual convention.  These
three object instances are conceptually combined to
represent the falling threshold for this entry.

When the current sampled value is less than or equal to this
threshold, and the value at the last sampling interval was
greater than this threshold, a single event will be
generated.  A single event will also be generated if the
first sample after this entry becomes valid is less than or
equal to this threshold and the associated
hcAlarmStartupAlarm is equal to fallingAlarm(2) or
risingOrFallingAlarm(3).

After a falling event is generated, another such event will
not be generated until the sampled value rises above this
threshold and reaches the threshold identified by the
hcAlarmRisingThreshAbsValueLo,
hcAlarmRisingThreshAbsValueHi, and
hcAlarmRisingThresholdValStatus objects.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:restriction base="smi:Unsigned32">
                                                <xsd:minInclusive value="0"/>
                                                <xsd:maxInclusive value="4294967295"/>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmFallingThresholdValStatus" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.13</oid>
                                                <xsd:documentation>This object indicates the sign of the data for the falling
threshold, as defined by the hcAlarmFallingThreshAbsValueLo
and hcAlarmFallingThreshAbsValueHi objects, as described in
the HcValueStatus textual convention.

The enumeration 'valueNotAvailable(1)' is not allowed, and
the associated hcAlarmStatus object cannot be equal to
'active(1)' if this object is set to this value.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType name="HcValueStatus">
                                        <xsd:restriction base="xsd:NMTOKEN">
                                                <xsd:enumeration value="valueNotAvailable">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>1</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="valuePositive">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>2</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="valueNegative">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>3</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmRisingEventIndex" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.14</oid>
                                                <xsd:documentation>The index of the eventEntry that is used when a rising
threshold is crossed.  The eventEntry identified by a
particular value of this index is the same as identified by
the same value of the eventIndex object.  If there is no
corresponding entry in the eventTable, then no association
exists.  In particular, if this value is zero, no associated
event will be generated, as zero is not a valid event index.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:union>
                                                <xsd:simpleType>
                                                        <xsd:restriction base="xsd:int">
                                                                <xsd:minInclusive value="0"/>
                                                                <xsd:maxInclusive value="65535"/>
                                                        </xsd:restriction>
                                                </xsd:simpleType>
                                        </xsd:union>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmFallingEventIndex" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.15</oid>
                                                <xsd:documentation>The index of the eventEntry that is used when a falling
threshold is crossed.  The eventEntry identified by a
particular value of this index is the same as identified by
the same value of the eventIndex object.  If there is no
corresponding entry in the eventTable, then no association
exists.  In particular, if this value is zero, no associated
event will be generated, as zero is not a valid event index.

This object may not be modified if the associated
hcAlarmStatus object is equal to active(1).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:union>
                                                <xsd:simpleType>
                                                        <xsd:restriction base="xsd:int">
                                                                <xsd:minInclusive value="0"/>
                                                                <xsd:maxInclusive value="65535"/>
                                                        </xsd:restriction>
                                                </xsd:simpleType>
                                        </xsd:union>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmValueFailedAttempts" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-only</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.16</oid>
                                                <xsd:documentation>The number of times the associated hcAlarmVariable instance
was polled on behalf of this hcAlarmEntry, (while in the
active state) and the value was not available.  This counter
may experience a discontinuity if the agent restarts,
indicated by the value of sysUpTime.</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType>
                                        <xsd:restriction base="smi:Counter32">
                                                <xsd:minInclusive value="0"/>
                                                <xsd:maxInclusive value="4294967295"/>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmOwner" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.17</oid>
                                                <xsd:documentation>The entity that configured this entry and is therefore
using the resources assigned to it.</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType name="OwnerString">
                                        <xsd:restriction base="smi:OctetString">
                                                <xsd:minInclusive value="0"/>
                                                <xsd:maxInclusive value="127"/>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmStorageType" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.18</oid>
                                                <xsd:documentation>The type of non-volatile storage configured for this entry.
If this object is equal to 'permanent(4)', then the
associated hcAlarmRisingEventIndex and
hcAlarmFallingEventIndex objects must be writable.</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType name="StorageType">
                                        <xsd:restriction base="xsd:NMTOKEN">
                                                <xsd:enumeration value="other">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>1</intValue>
                                                                        <xsd:documentation>-- eh?</xsd:documentation>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="volatile">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>2</intValue>
                                                                        <xsd:documentation>-- e.g., in RAM</xsd:documentation>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="nonVolatile">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>3</intValue>
                                                                        <xsd:documentation>-- e.g., in NVRAM</xsd:documentation>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="permanent">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>4</intValue>
                                                                        <xsd:documentation>-- e.g., partially in ROM</xsd:documentation>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="readOnly">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>5</intValue>
                                                                        <xsd:documentation>-- e.g., completely in ROM</xsd:documentation>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                        <xsd:element name="hcAlarmStatus" minOccurs="0">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <maxAccess>read-write</maxAccess>
                                                <status>current</status>
                                                <oid>1.3.6.1.2.1.16.29.1.1.1.1.19</oid>
                                                <xsd:documentation>The status of this row.

An entry MUST NOT exist in the active state unless all
objects in the entry have an appropriate value, as described
in the description clause for each writable object.

The hcAlarmStatus object may be modified if the associated
instance of this object is equal to active(1),
notInService(2), or notReady(3).  All other writable objects
may be modified if the associated instance of this object is
equal to notInService(2) or notReady(3).</xsd:documentation>
                                        </xsd:appinfo>
                                </xsd:annotation>
                                <xsd:simpleType name="RowStatus">
                                        <xsd:restriction base="xsd:NMTOKEN">
                                                <xsd:enumeration value="active">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>1</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="notInService">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>2</intValue>
                                                                        <xsd:documentation>-- the following value is a state:
-- this value may be read, but not written</xsd:documentation>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="notReady">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>3</intValue>
                                                                        <xsd:documentation>-- the following three values are
-- actions: these values may be written,
--   but are never read</xsd:documentation>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="createAndGo">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>4</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="createAndWait">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>5</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                                <xsd:enumeration value="destroy">
                                                        <xsd:annotation>
                                                                <xsd:appinfo>
                                                                        <intValue>6</intValue>
                                                                </xsd:appinfo>
                                                        </xsd:annotation>
                                                </xsd:enumeration>
                                        </xsd:restriction>
                                </xsd:simpleType>
                        </xsd:element>
                </xsd:sequence>
                <xsd:attribute name="hcAlarmIndex" type="smi:Integer32"/>
        </xsd:complexType>
        <xsd:simpleType name="HcValueStatus">
                <xsd:annotation>
                        <xsd:documentation>This data type indicates the validity and sign of the data
in associated object instances which represent the absolute
value of a high capacity numeric quantity.  Such an object
may be represented with one or more object instances. An
object of type HcValueStatus MUST be defined within the same
structure as the object(s) representing the high capacity
absolute value.

If the associated object instance(s) representing the high
capacity absolute value could not be accessed during the
sampling interval, and is therefore invalid, then the
associated HcValueStatus object will contain the value
'valueNotAvailable(1)'.

If the associated object instance(s) representing the high
capacity absolute value are valid and actual value of the
sample is greater than or equal to zero, then the associated
HcValueStatus object will contain the value
'valuePositive(2)'.

If the associated object instance(s) representing the high
capacity absolute value are valid and the actual value of
the sample is less than zero, then the associated
HcValueStatus object will contain the value
'valueNegative(3)'.  The associated absolute value should be
multiplied by -1 to obtain the true sample value.</xsd:documentation>
                </xsd:annotation>
                <xsd:restriction base="xsd:NMTOKEN">
                        <xsd:enumeration value="valueNotAvailable">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <intValue>1</intValue>
                                        </xsd:appinfo>
                                </xsd:annotation>
                        </xsd:enumeration>
                        <xsd:enumeration value="valuePositive">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <intValue>2</intValue>
                                        </xsd:appinfo>
                                </xsd:annotation>
                        </xsd:enumeration>
                        <xsd:enumeration value="valueNegative">
                                <xsd:annotation>
                                        <xsd:appinfo>
                                                <intValue>3</intValue>
                                        </xsd:appinfo>
                                </xsd:annotation>
                        </xsd:enumeration>
                </xsd:restriction>
        </xsd:simpleType>
</xsd:schema>
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