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This is documentation for Caché & Ensemble. See the InterSystems IRIS version of this content.

For information on migrating to InterSystems IRIS, see How to Migrate to InterSystems IRIS, available on the WRC Distributions page (login required).

About This Book

The InterSystems Callout Gateway (implemented in the Caché $ZF functions) allows you to invoke external programs and system services from Caché. It also provides a way to integrate your custom code into Caché.

This book addresses the following topics:

For a detailed outline, see the Table of Contents.

For general information, see Using InterSystems Documentation.

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