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Oracle8i Intermedia Text Oracle8i interMedia Text Reference Release 8.1.5 February 1999 Part No. A67843-01 Oracle8i interMedia Text Reference, Release 8.1.5 Part No. A67843-01 Copyright © 1996, 1999, Oracle Corporation. All rights reserved. Primary Author: Colin McGregor Contributors: Shamim Alpha, Chandu Bhavsar, D. Yitzik Brenman, Steve Buxton, Chung-Ho Chen, Yun Cheng, Paul Dixon, Mohammad Faisal, Lee Horner, Elena Huang, Garret Kaminaga, Jeff Krauss, Jacque- line Kud, Wesley Lin, Kavi Mahesh, Yasuhiro Matsuda, Gerda Shank, and Steve Yang. The Programs are not intended for use in any nuclear, aviation, mass transit, medical, or other inherently dangerous applications. It shall be the licensee’s responsibility to take all appropriate fail-safe, backup, redundancy and other measures to ensure the safe use of such applications if the Programs are used for such purposes, and Oracle disclaims liability for any damages caused by such use of the Programs. The Programs (which include both the software and documentation) contain proprietary information of Oracle Corporation; they are provided under a license agreement containing restrictions on use and disclosure and are also protected by copyright, patent, and other intellectual and industrial property laws. Reverse engineering, disassembly, or decompilation of the Programs is prohibited. The information contained in this document is subject to change without notice. If you find any problems in the documentation, please report them to us in writing. Oracle Corporation does not warrant that this document is error free. Except as may be expressly permitted in your license agreement for these Programs, no part of these Programs may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Oracle Corporation. If the Programs are delivered to the U.S. Government or anyone licensing or using the Programs on behalf of the U.S. Government, the following notice is applicable: Restricted Rights Notice Programs delivered subject to the DOD FAR Supplement are "commercial computer software" and use, duplication, and disclosure of the Programs including documentation, shall be subject to the licensing restrictions set forth in the applicable Oracle license agreement. Otherwise, Programs delivered subject to the Federal Acquisition Regulations are "restricted computer software" and use, duplication, and disclosure of the Programs shall be subject to the restrictions in FAR 52.227-19, Commercial Computer Software - Restricted Rights (June, 1987). Oracle Corporation, 500 Oracle Parkway, Redwood City, CA 94065. Oracle is a registered trademark, and ConText, Net8, PL/SQL, Oracle7, Oracle8, Oracle8i, Oracle Call Interface, SQL*Plus, and SQL*Loader are trademarks or registered trademarks of Oracle Corporation. All other company or product names mentioned are used for identification purposes only and may be trademarks of their respective owners. Contents Send Us Your Comments ................................................................................................................. xiii Preface ......................................................................................................................................................... xv 1 Introduction to interMedia Text Overview ............................................................................................................................................. 1-2 System-Defined Roles........................................................................................................................ 1-3 Loading Documents ........................................................................................................................... 1-4 Column Types............................................................................................................................... 1-4 Document Formats ....................................................................................................................... 1-4 Loading Methods.......................................................................................................................... 1-4 Indexing Text ....................................................................................................................................... 1-6 General Defaults for All Languages .......................................................................................... 1-6 Language Specific Defaults......................................................................................................... 1-7 Index Maintenance ....................................................................................................................... 1-7 Querying............................................................................................................................................... 1-9 Word Query Example .................................................................................................................. 1-9 ABOUT Query Example .............................................................................................................. 1-9 Other Query Features................................................................................................................. 1-10 Document Presentation and Highlighting .................................................................................. 1-11 2 SQL Commands ALTER INDEX..................................................................................................................................... 2-2 DROP INDEX...................................................................................................................................... 2-7 iii CONTAINS .......................................................................................................................................... 2-8 CREATE INDEX ................................................................................................................................ 2-10 SCORE................................................................................................................................................. 2-15 3 Indexing Overview............................................................................................................................................... 3-2 Creating Preferences..................................................................................................................... 3-2 Datastore Objects................................................................................................................................ 3-3 DIRECT_DATASTORE ............................................................................................................... 3-3 DETAIL_DATASTORE ............................................................................................................... 3-3 FILE_DATASTORE ...................................................................................................................... 3-5 URL_DATASTORE ..................................................................................................................... 3-6 USER_DATASTORE .................................................................................................................... 3-9 Filter Objects...................................................................................................................................... 3-10 NULL_FILTER ........................................................................................................................... 3-10 INSO_FILTER.............................................................................................................................. 3-10 USER_FILTER ............................................................................................................................. 3-11 CHARSET_FILTER .................................................................................................................... 3-11 Lexer Objects...................................................................................................................................... 3-12 BASIC_LEXER............................................................................................................................. 3-12 CHINESE_VGRAM_LEXER ..................................................................................................... 3-18 JAPANESE_VGRAM_LEXER................................................................................................... 3-18 KOREAN_LEXER ....................................................................................................................... 3-18 Wordlist Object.................................................................................................................................. 3-19 BASIC_WORDLIST .................................................................................................................... 3-19 Storage Objects.................................................................................................................................. 3-22 BASIC_STORAGE ...................................................................................................................... 3-22 Section Group Types ........................................................................................................................ 3-24 System-Defined Preferences ..........................................................................................................
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