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Q189199: Inside Distributed COM Comments and Corrections

Article: Q189199
Product(s): Microsoft Press
Version(s): 
Operating System(s): 
Keyword(s): kbdocerr
Last Modified: 08-JAN-2000

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The information in this article applies to:

- MSPRESS Inside Distributed COM ISBN 1-57231-849-X 
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SUMMARY
=======

This article contains comments, corrections, and information about known errors
relating to the Microsoft Press book Inside Distributed COM, ISBN
1-57231-849-X.

The following topics are covered:

- Page 52: Reflexive and Symmetric Used Incorrectly

MORE INFORMATION
================

Page 52: Reflexive and Symmetric Used Incorrectly
-------------------------------------------------

The terms "Reflexive" and "Symmetric" are used incorrectly to describe
QueryInterface rules. The correct meaning of these terms is as follows:

  Reflexive: (A=A)
  Symmetric: (if A=B, then B=A)

To correct the book, the terms should be swapped. Specifically, page 52 should be
changed in the following ways:

  QueryInterface must be reflexive. If a client holds a pointer to an interface
  and queries for that same interface, the call must succeed. QueryInterface
  must be symmetric. If a client holding a pointer to one interface queries
  successfully for a second interface, the client must be able to call
  QueryInterface through the second pointer for the first interface.

Swap Reflexive and Symmetric labels on Figure 2-4.


Microsoft Press is committed to providing informative and accurate books. All
comments and corrections listed above are ready for inclusion in future
printings of this book. If you have a later printing of this book, it may
already contain most or all of the above corrections.

Additional query words: ms_press

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Keywords          : kbdocerr 
Technology        : kbMSPressSearch
Version           : :

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