Software Extensibility And The System Object Model

ð Software Extensibility and the System Object Model (SOM) ð Preliminary Developer Press  Apple Computer, Inc. 1992–1995 This document was created with FrameMaker 4.0.4 ð Apple Computer, Inc.  1992–1995 Apple Computer, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, mechanical, electronic, photocopying, recording, or otherwise, without prior written permission of Apple Computer, Inc., except to make a backup copy of any documentation provided on CD-ROM. The Apple logo is a trademark of Apple Computer, Inc. Use of the “keyboard” Apple logo (Option-Shift-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. No licenses, express or implied, are granted with respect to any of the technology described in this book. Apple retains all intellectual property rights associated with the technology described in this book. This book is intended to assist application developers to develop applications only for Apple-labeled or Apple-licensed computers. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for typographical errors. Apple Computer, Inc. 1 Infinite Loop Cupertino, CA 95014 408-996-1010 Apple, the Apple logo, AppleLink, AppleScript, AppleShare, AppleTalk, GeoPort, HyperCard, ImageWriter, LocalTalk, Macintosh, MacTCP, OpenDoc, PowerBook, Power Macintosh, PowerTalk, QuickTime, TrueType, and WorldScript are trademarks of Apple Computer, Inc., registered in the United States and other countries. Balloon Help, Chicago, Finder, Geneva, Mac, and QuickDraw are trademarks of Apple Computer, Inc. IBM is a registered trademark of International Business Machines Corporation. MacPaint and MacWrite are registered trademarks, and Clarisworks is a trademark, of Claris Corporation. NuBus is a trademark of Texas Instruments. PowerPC is a trademark of International Business Machines Corporation, used under license therefrom. UNIX is a registered trademark of Novell, Inc. in the United States and other countries, licensed exclusively through X/Open Company, Ltd. Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.. Simultaneously published in the United States and Canada. Even though Apple has reviewed this manual, APPLE MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THIS MANUAL, ITS QUALITY, ACCURACY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS MANUAL IS SOLD “AS IS,” AND YOU, THE PURCHASER, ARE ASSUMING THE ENTIRE RISK AS TO ITS QUALITY AND ACCURACY. IN NO EVENT WILL APPLE BE LIABL…