Kinds of Data

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In very general terms, there are two kinds of data in any system:

Transaction data represents a system's normal day-to-day business transactions. If you couldn't create these documents, your business would stop immediately. Purchase orders, invoices, and production orders are all examples of transaction data. These are discussed in more detail in Lesson 22, "Kinds of Business Documents."
Master data is relatively fixed in your system. Your company could run for days without creating new master data. Customer Master, Personnel Master, and Chart of Accounts are all examples of master data. (Note that not all master data has the word Master in its name .)

The authority to change master data is usually controlled more tightly than the authority to create transaction data. Although most SAP R/3 users don't need to maintain or create master data, all users must use information contained in master files in one way or another.

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