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Collection metadata in this guide are instructions for implementing the CDASH model to develop CRFs and the underlying database or other data collection structure.Collection metadata for metadata for the TIG are provided in : Section 2.7.6, Metadata for Individual Health.

Collection metadata will be used with all guidance in this section and are organized with one set of metadata per domain.All collection metadata begin with a description. A metadata specification follows to describe data collection fields and their attributes. Assumptions are also provided to further guide implementation. Metadata are structured to present one or more rows for each data collection field with columns to describe attributes for each field. More than one row will be present in the metadata specification when there is more than one data collection scenario for a data collection field. When more than one option is applicable in a single cell, semicolons are used to separate discreet options.

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