Help : Strata

The Strata of a Data-Field is a description of the nature of the data it describes. There are four categories:

Note that the choice of strata can be somewhat subjective for some data-fields. Quick Search and the main Field Listing show only data-fields in the Primary and Derived strata, use of Full Search is advisable if you are selecting data-fields for a research application.
For additional information: Search contents , see Glossary or download User Guide.

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