Knowing the internal mechanisms used by 4D to retrieve records, as well as how data is stored based on the platform, is interesting for many reasons. This knowledger enables you to prepare your data for a cross-platform environment and understand the operations involved with recovering damaged data.

In this article, we are going to continue our tour at the heart of 4D's data file. We recommend that you read the previous technical note, TN 01-29. That article described the basic principles which we are about to explain in depth.

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