晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。   林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。   见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝)   既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。   南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。 sh-3ll

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DIR:/opt/alt/net-snmp11/usr/share/snmp/mibs/
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Current File : //opt/alt/net-snmp11/usr/share/snmp/mibs/SNMPv2-CONF.txt
SNMPv2-CONF DEFINITIONS ::= BEGIN

IMPORTS ObjectName, NotificationName, ObjectSyntax
                                               FROM SNMPv2-SMI;

-- definitions for conformance groups

OBJECT-GROUP MACRO ::=
BEGIN
    TYPE NOTATION ::=
                  ObjectsPart
                  "STATUS" Status
                  "DESCRIPTION" Text
                  ReferPart

    VALUE NOTATION ::=
                  value(VALUE OBJECT IDENTIFIER)

    ObjectsPart ::=
                  "OBJECTS" "{" Objects "}"
    Objects ::=
                  Object
                | Objects "," Object
    Object ::=

                  value(ObjectName)

    Status ::=
                  "current"
                | "deprecated"
                | "obsolete"

    ReferPart ::=
                  "REFERENCE" Text
                | empty

    -- a character string as defined in [2]
    Text ::= value(IA5String)
END

-- more definitions for conformance groups

NOTIFICATION-GROUP MACRO ::=
BEGIN
    TYPE NOTATION ::=
                  NotificationsPart
                  "STATUS" Status
                  "DESCRIPTION" Text
                  ReferPart

    VALUE NOTATION ::=
                  value(VALUE OBJECT IDENTIFIER)

    NotificationsPart ::=
                  "NOTIFICATIONS" "{" Notifications "}"
    Notifications ::=
                  Notification
                | Notifications "," Notification
    Notification ::=
                  value(NotificationName)

    Status ::=
                  "current"
                | "deprecated"
                | "obsolete"

    ReferPart ::=
                  "REFERENCE" Text
                | empty

    -- a character string as defined in [2]
    Text ::= value(IA5String)
END

-- definitions for compliance statements

MODULE-COMPLIANCE MACRO ::=
BEGIN
    TYPE NOTATION ::=
                  "STATUS" Status
                  "DESCRIPTION" Text
                  ReferPart
                  ModulePart

    VALUE NOTATION ::=
                  value(VALUE OBJECT IDENTIFIER)

    Status ::=
                  "current"
                | "deprecated"
                | "obsolete"

    ReferPart ::=
                  "REFERENCE" Text
                | empty

    ModulePart ::=
                  Modules
    Modules ::=
                  Module
                | Modules Module
    Module ::=
                  -- name of module --
                  "MODULE" ModuleName
                  MandatoryPart
                  CompliancePart

    ModuleName ::=
                  -- identifier must start with uppercase letter
                  identifier ModuleIdentifier
                  -- must not be empty unless contained
                  -- in MIB Module
                | empty
    ModuleIdentifier ::=
                  value(OBJECT IDENTIFIER)
                | empty

    MandatoryPart ::=
                  "MANDATORY-GROUPS" "{" Groups "}"
                | empty

    Groups ::=

                  Group
                | Groups "," Group
    Group ::=
                  value(OBJECT IDENTIFIER)

    CompliancePart ::=
                  Compliances
                | empty

    Compliances ::=
                  Compliance
                | Compliances Compliance
    Compliance ::=
                  ComplianceGroup
                | Object

    ComplianceGroup ::=
                  "GROUP" value(OBJECT IDENTIFIER)
                  "DESCRIPTION" Text

    Object ::=
                  "OBJECT" value(ObjectName)
                  SyntaxPart
                  WriteSyntaxPart
                  AccessPart
                  "DESCRIPTION" Text

    -- must be a refinement for object's SYNTAX clause
    SyntaxPart ::= "SYNTAX" Syntax
                | empty

    -- must be a refinement for object's SYNTAX clause
    WriteSyntaxPart ::= "WRITE-SYNTAX" Syntax
                | empty

    Syntax ::=    -- Must be one of the following:
                       -- a base type (or its refinement),
                       -- a textual convention (or its refinement), or
                       -- a BITS pseudo-type
                  type
                | "BITS" "{" NamedBits "}"

    NamedBits ::= NamedBit
                | NamedBits "," NamedBit

    NamedBit ::= identifier "(" number ")" -- number is nonnegative

    AccessPart ::=
                  "MIN-ACCESS" Access
                | empty
    Access ::=
                  "not-accessible"
                | "accessible-for-notify"
                | "read-only"
                | "read-write"
                | "read-create"

    -- a character string as defined in [2]
    Text ::= value(IA5String)
END

-- definitions for capabilities statements

AGENT-CAPABILITIES MACRO ::=
BEGIN
    TYPE NOTATION ::=
                  "PRODUCT-RELEASE" Text
                  "STATUS" Status
                  "DESCRIPTION" Text
                  ReferPart
                  ModulePart

    VALUE NOTATION ::=
                  value(VALUE OBJECT IDENTIFIER)

    Status ::=
                  "current"
                | "obsolete"

    ReferPart ::=
                  "REFERENCE" Text
                | empty

    ModulePart ::=
                  Modules
                | empty
    Modules ::=
                  Module
                | Modules Module
    Module ::=
                  -- name of module --
                  "SUPPORTS" ModuleName
                  "INCLUDES" "{" Groups "}"
                  VariationPart

    ModuleName ::=

                  -- identifier must start with uppercase letter
                  identifier ModuleIdentifier
    ModuleIdentifier ::=
                  value(OBJECT IDENTIFIER)
                | empty

    Groups ::=
                  Group
                | Groups "," Group
    Group ::=
                  value(OBJECT IDENTIFIER)

    VariationPart ::=
                  Variations
                | empty
    Variations ::=
                  Variation
                | Variations Variation

    Variation ::=
                  ObjectVariation
                | NotificationVariation

    NotificationVariation ::=
                  "VARIATION" value(NotificationName)
                  AccessPart
                  "DESCRIPTION" Text

    ObjectVariation ::=
                  "VARIATION" value(ObjectName)
                  SyntaxPart
                  WriteSyntaxPart
                  AccessPart
                  CreationPart
                  DefValPart
                  "DESCRIPTION" Text

    -- must be a refinement for object's SYNTAX clause
    SyntaxPart ::= "SYNTAX" Syntax
                | empty

    WriteSyntaxPart ::= "WRITE-SYNTAX" Syntax
                | empty

    Syntax ::=    -- Must be one of the following:
                       -- a base type (or its refinement),
                       -- a textual convention (or its refinement), or
                       -- a BITS pseudo-type

                  type
                | "BITS" "{" NamedBits "}"

    NamedBits ::= NamedBit
                | NamedBits "," NamedBit

    NamedBit ::= identifier "(" number ")" -- number is nonnegative

    AccessPart ::=
                  "ACCESS" Access
                | empty

    Access ::=
                  "not-implemented"
                -- only "not-implemented" for notifications
                | "accessible-for-notify"
                | "read-only"
                | "read-write"
                | "read-create"
                -- following is for backward-compatibility only
                | "write-only"

    CreationPart ::=
                  "CREATION-REQUIRES" "{" Cells "}"
                | empty
    Cells ::=
                  Cell
                | Cells "," Cell
    Cell ::=
                  value(ObjectName)

    DefValPart ::= "DEFVAL" "{" Defvalue "}"
                | empty

    Defvalue ::=  -- must be valid for the object's syntax
                  -- in this macro's SYNTAX clause, if present,
                  -- or if not, in object's OBJECT-TYPE macro
                  value(ObjectSyntax)
                | "{" BitsValue "}"

    BitsValue ::= BitNames
                | empty

    BitNames ::=  BitName
                | BitNames "," BitName

    BitName ::= identifier

    -- a character string as defined in [2]
    Text ::= value(IA5String)
END

END