1、Reference numberISO/IEC 8824-2:1998(E)ISO/IEC 1998INTERNATIONALSTANDARDISO/IEC8824-2Second edition1998-12-15Information technology AbstractSyntax Notation One (ASN.1): Informationobject specificationTechnologies de linformation Notation de syntaxe abstraite numroun (ASN.1): Spcification des objets i
2、nformationnelsAdopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Standard.Date of ANSI Approval: 12/21/00Published by American National Standards Institute,25 West 43rd Street, New York, New York 10036Copyright 2002 by Information Technology Indu
3、stry Council (ITI).All rights reserved.These materials are subject to copyright claims of International Standardization Organization (ISO), InternationalElectrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council(ITI). Not for resale.
4、No part of this publication may be reproduced in any form, including an electronic retrieval system, withoutthe prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW,Washington, DC 20005.Printed in the United States of AmericaISO/IEC
5、 8824-2:1998(E)PDF disclaimerThis PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall notbe edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloadin
6、g thisfile, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in thisarea.Adobe is a trademark of Adobe Systems Incorporated.Details of the software products used to create this PDF file can be found in the General I
7、nfo relative to the file; the PDF-creation parameterswere optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely eventthat a problem relating to it is found, please inform the Central Secretariat at the address given below.
8、 ISO/IEC 1998All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronicor mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member bodyin
9、 the country of the requester.ISO copyright officeCase postale 56 Gb7 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 734 10 79E-mail copyrightiso.chWeb www.iso.chPublished by ISO in 1999Printed in Switzerlandii ISO/IEC 1998 All rights reservedISO/IEC 8824-2:1998(E) ISO/IEC 1998 All rights reserv
10、ed iii7(51$/)$/6(,62 ,( ( ,167$1 ( (DPSOHV7KH HDPSOHV RI FODVV GHILQLWLRQV IURP DERYH FDQ EH HTXLSSHG ZLWK GHILQHG VQWD WR SURYLGH D XVHU IULHQGO ZDRI GHILQLQJ LQVWDQFHV RI WKH FODVVHV WKLV GHILQHG VQWD LV XVHG LQ WKH HDPSOH LQ 23(5$7,21 _,62 ,( ( ,I WKH 2EMHFW LV D D HILQHG2EMHFW WKHQ WKH REMHFW LV
11、 WKH VDPH DV WKDW UHIHUUHG WR E 2EMHFWHIQ WKHQ WKH REMHFW LV DV VSHFLILHG LQ F 2EMHFW)URP2EMHFW WKHQ WKH REMHFW LV DV VSHFLILHG LQ FODXVH G 3DUDPHWHULHG2EMHFW WKHQ WKH REMHFW LV GHILQHG DV VSHFLILHG LQ ,78 7 5HF ; _ ,62 ,( ( (DPSOHV HIDXOW 6QWD *LYHQ WKH LQIRUPDWLRQ REMHFW FODVV GHILQLWLRQV RI DERYH
12、 ZKLFK GR QRW LQFOXGH D :LWK6QWD6SHF LQVWDQFHV RI WKHFODVVHV DUH GHILQHG XVLQJ WKH HIDXOW6QWD )RU HDPSOH DQ HSDQGHG YHUVLRQ RI WKH HDPSOH JLYHQ LQ LQYHUW0DWUL 23(5$7,21 $UJXPHQW7SH0DWUL 5HVXOW7SH 0DWUL (UURUV GHWHUPLQDQW,V=HUR RSHUDWLRQ _ ,62 ,( _ ,62 ,( ( ,I DQ HWHQVLEOH REMHFW VHW $ LV UHIHUHQFHG
13、LQ WKH GHILQLWLRQ RI DQRWKHU REMHFW VHW % LWV HWHQVLRQ PDUNHU LVLQKHULWHG E % ,I D 9DOXH6HW)URP2EMHFWV VHH FODXVH LV GHILQHG XVLQJ DQ HWHQVLEOH REMHFW VHW WKH UHVXOWLQJ YDOXH VHWGRHV QRW LQKHULW WKH HWHQVLRQ PDUNHU IURP WKH REMHFW VHW ,I D WSH LV FRQVWUDLQHG E D WDEOH FRQVWUDLQW VHH RI ,78 7 5HF ; _
14、 ,62 ,( _ ,62 ,( ( *LYHQ DQ LQIRUPDWLRQ REMHFW VHW RI VRPH FODVV WKH VHW RI URZV LQ WKH DVVRFLDWHG WDEOH DUH WKRVH ZKLFK ZRXOGUHVXOW IURP SHUIRUPLQJ WKH IROORZLQJ UHFXUVLYH SURFHGXUH D 6WDUW ZLWK RQH URZ IRU HDFK REMHFW LQ WKH REMHFW VHW ,Q HDFK VXFK URZ WKH FHOOV LQ WKH FROXPQV QDPHG E3ULPLWLYH)LHO
15、G1DPH V ZLOO FRUUHVSRQG WR WKH VHWWLQJ RI WKH DSSURSULDWH ILHOG LQ WKH REMHFW ZKLOH DOO RWKHUFHOOV ZLOO EH HPSW E )RU HDFK OLQN ILHOG DSSHDULQJ LQ VRPH URZ LQ WKH VHW *HQHUDWH WKH VXERUGLQDWH DVVRFLDWHG WDEOH RI WKH FRQWHQWV RI WKH OLQN ILHOG 1HW UHSODFH WKH URZ LQ ZKLFK WKH OLQN ILHOG DSSHDUV E D F
16、ROOHFWLRQ RI URZV RQH IRU HDFK URZ RI WKHVXERUGLQDWH DVVRFLDWHG WDEOH (DFK RI WKH URZV LQ WKLV FROOHFWLRQ LV WKH VDPH DV WKDW EHLQJ UHSODFHG HFHSW WKDW WKH FHOOV IURP WKH VHOHFWHG URZ RI WKH VXERUGLQDWH DVVRFLDWHG WDEOH DUH XVHG WR ILOO WKHFRUUHVSRQGLQJ FHOOV KLWKHUWR HPSW ZKRVH )LHOG1DPH V DUH SUHI
17、LHG E WKH OLQN ILHOGV3ULPLWLYH)LHOG1DPH 127( 7KHVH UXOHV DUH UHFXUVLYH DQG DUH VXFK WKDW LI DQ LQIRUPDWLRQ REMHFW LV GLUHFWO RU LQGLUHFWOVHOI UHIHUHQWLDO WKH SURFHGXUH ZLOO QRW WHUPLQDWH 7KLV LV QRW SURKLELWHG ,Q SUDFWLFH LW LV RQO QHFHVVDUWR NQRZ WKH FRQWHQWV RI FHOOV ZLWK QDPHV RI D ILQLWH OHQJWK
18、DQG D ERXQGHG SURFHGXUH FDQ EH GHYLVHG IRUWKLV (DPSOHV RI YDOLG )LHOG1DPH V7KH IROORZLQJ )LHOG1DPH V DUH DPRQJ WKRVH ZKLFK DUH YDOLG IRU WKH DVVRFLDWHG WDEOH IRU REMHFWV RU REMHFW VHWV RI FODVV23(5$7,21 DV GHILQHG LQ $UJXPHQW7SH(UURUV 3DUDPHWHU(UURUV HUURU _ ,62 ,( _ ,62 ,( ( G (QFRGLQJ UXOHV DUH UH
19、TXLUHG WR HQFRGH WKH YDOXH DVVLJQHG WR D FRPSRQHQW GHILQHG LQ WKLV ZD LQ VXFK DZD WKDW D UHFHLYHU FDQ VXFFHVVIXOO GHWHUPLQH WKH DEVWUDFW YDOXHV FRUUHVSRQGLQJ WR DOO RWKHU SDUWV RI WKHFRQVWUXFWLRQ LQ ZKLFK WKH FRPSRQHQW LV HPEHGGHG ZLWKRXW DQ NQRZOHGJH RI WKH DFWXDO WSH RI WKLVFRPSRQHQW 127( 7KLV 7SH
20、 FRQVWUXFW ZLOO FRPPRQO EH FRQVWUDLQHG E XVH RI DQ LQIRUPDWLRQ REMHFW VHW DQG WKH$W1RWDWLRQ DV VSHFLILHG LQ ,78 7 5HF ; _ ,62 ,( ( ,QIRUPDWLRQ IURP REMHFWV,QIRUPDWLRQ IURP WKH FROXPQ RI WKH DVVRFLDWHG WDEOH IRU DQ REMHFW RU DQ REMHFW VHW FDQ EH UHIHUHQFHG E WKHYDULRXV FDVHV RI WKH ,QIRUPDWLRQ)URP2EM
21、HFWV QRWDWLRQ ,QIRUPDWLRQ)URP2EMHFWV 9DOXH)URP2EMHFW _9DOXH6HW)URP2EMHFWV _7SH)URP2EMHFW _2EMHFW)URP2EMHFW _2EMHFW6HW)URP2EMHFWV9DOXH)URP2EMHFW 5HIHUHQFHG2EMHFWV)LHOG1DPH9DOXH6HW)URP2EMHFWV 5HIHUHQFHG2EMHFWV)LHOG1DPH7SH)URP2EMHFW 5HIHUHQFHG2EMHFWV)LHOG1DPH2EMHFW)URP2EMHFW 5HIHUHQFHG2EMHFWV)LHOG1DPH2
22、EMHFW6HW)URP2EMHFWV 5HIHUHQFHG2EMHFWV)LHOG1DPH5HIHUHQFHG2EMHFWV HILQHG2EMHFW _ 3DUDPHWHULHG2EMHFW _HILQHG2EMHFW6HW _ 3DUDPHWHULHG2EMHFW6HW7KLV QRWDWLRQ UHIHUHQFHV WKH WRWDO FRQWHQWV RI WKH UHIHUHQFHG FROXPQ RI WKH DVVRFLDWHG WDEOH IRU WKH5HIHUHQFHG2EMHFWV HSHQGLQJ RQ WKH IRUP RI WKH 5HIHUHQFHG2EMHFW
23、V DQG WKH )LHOG1DPH WKLV QRWDWLRQ FDQ GHQRWH D YDOXH DYDOXH VHW D WSH DQ REMHFW RU DQ REMHFW VHW 7KHVH ILYH FDVHV DUH GHQRWHG E WKH FRQVWUXFWV 9DOXH)URP2EMHFW 9DOXH6HW)URP2EMHFWV 7SH)URP2EMHFW 2EMHFW)URP2EMHFW DQG 2EMHFW6HW)URP2EMHFWV UHVSHFWLYHO (DFK RIWKHVH FRQVWUXFWV LV D VSHFLDO FDVH RI ,QIRUPDW
24、LRQ)URP2EMHFWV 7KH ,QIRUPDWLRQ)URP2EMHFWV SURGXFWLRQ FDQ EH GLYLGHG LQWR WZR SDUWV 7KH ILUVW SDUW LV IRUPHG E GHOHWLQJWKH ILQDO RU RQO 3ULPLWLYH)LHOG1DPH DQG LWV SUHFHGLQJ SHULRG ,I WKH ILUVW SDUW GHQRWHV DQ REMHFW RU DQ REMHFW VHW WKHQVXEFODXVHV WR DSSO 2WKHUZLVH WKH QRWDWLRQ LV LOOHJDO 7KH VHFRQG
25、SDUW LV WKH ILQDO RU RQO 3ULPLWLYH)LHOG1DPH 127( 7XWRULDO *LYHQ WKH IROORZLQJ GHILQLWLRQ REM D E F GWKH ILUVW SDUW LQ WKH GHILQLWLRQ LV REM D E F DQG WKH VHFRQG SDUW LV G 7KH ILUVW FROXPQ RI 7DEOH LQGLFDWHV WKH ILUVW SDUW GHILQHG LQ 7KH VHFRQG FROXPQ LQGLFDWHV WKH VHFRQGSDUW GHILQHG LQ 7KH WKLUG FRO
26、XPQ LQGLFDWHV ZKLFK LI DQ RI WKH ILYH FDVHV RI ,QIRUPDWLRQ)URP2EMHFWV OLVWHGLQ DSSOLHV ,62 ,( ( 7DEOH 3HUPLVVDEOH FDVHV RI ,QIRUPDWLRQ)URP2EMHFWV ,I REMHFW VHWV DUH LQYROYHG DQG WKH ILQDO 3ULPLWLYH)LHOG1DPH LGHQWLILHV D ILHG WSH YDOXH VHW ILHOG WKHQ9DOXH6HW)URP2EMHFWV LV WKH XQLRQ RI WKH VHOHFWHG YD
27、OXH VHWV ,I REMHFW VHWV DUH LQYROYHG DQG WKH ILQDO 3ULPLWLYH)LHOG1DPH LGHQWLILHV DQ REMHFW VHW ILHOG WKHQ2EMHFW6HW)URP2EMHFWV LV WKH XQLRQ RI WKH VHOHFWHG REMHFW VHWV $V VKRZQ LQ 7DEOH WKH QRWDWLRQ LV QRW SHUPLWWHG LI DQ REMHFW VHW LV LQYROYHG DQG WKH ILQDO3ULPLWLYH)LHOG1DPH LGHQWLILHV D YDULDEOH WS
28、H YDOXH RU YDOXH VHW ILHOG RU D WSH ILHOG 8VH RI WKLV QRWDWLRQ LV QRW SHUPLWWHG LI DOO FHOOV LQ WKH FROXPQ EHLQJ UHIHUHQFHG DUH HPSW HFHSW ZKHUH LW LVXVHG WR GLUHFWO GHILQH D ILHOG RI DQ LQIRUPDWLRQ REMHFW ZKLFK LV 237,21$/ RU ()$8/7 ZKLFK UHVXOWV LQ WKHILHOG EHFRPLQJ HPSW RU GHIDXOWV (DPSOH LQIRUPD
29、WLRQ IURP REMHFWV*LYHQ WKH GHILQLWLRQV LQ WKH HDPSOHV RI DQG WKH IROORZLQJ FRQVWUXFWV LQ WKH OHIW FROXPQ DUH YDOLG DQGFDQ EH XVHG DV HTXLYDOHQW WR WKH HSUHVVLRQ LQ WKH ULJKW FROXPQ 9DOXH)URP2EMHFW 7SH)URP2EMHFW 7KH ILUVW SDUW RI,QIRUPDWLRQ)URP2EMHFWV7KH VHFRQG SDUW RI,QIRUPDWLRQ)URP2EMHFWV( 9DOXH6HW
30、)URP2EMHFWV 2EMHFW6HW)URP2EMHFWV LQYHUW0DWUL (UURUV HUURU ( $QQH $7KH 7+$6 3523(57 SURSHUW7KH LG ILHOG RI HDFK $%675$ LV WKH DEVWUDFW VQWD QDPH ZKLOH WKH 7SH ILHOG FRQWDLQV WKH VLQJOH$61 WSH ZKRVH YDOXHV PDNH XS WKH DEVWUDFW VQWD 7KH SURSHUW KDQGOHV LQYDOLG HQFRGLQJV LQGLFDWHV WKDW WKHLQYDOLG HQFRGL
31、QJV DUH QRW WR EH WUHDWHG DV DQ HUURU GXULQJ WKH GHFRGLQJ SURFHVV DQG WKH GHFLVLRQ RQ KRZ WR WUHDW VXFKLQYDOLG HQFRGLQJV LV OHIW XS WR WKH DSSOLFDWLRQ % 7KLV LQIRUPDWLRQ REMHFW FODVV LV GHILQHG DV EHLQJ XVHIXO EHFDXVH LW LV RI JHQHUDO XWLOLW DQG LV DYDLODEOH LQ DQPRGXOH ZLWKRXW WKH QHFHVVLW IRU LPSR
32、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
