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Analysis dataset structures in this guide provide a standard way to build analysis datasets. These structures are captured in the "CLASS OF DATASET" field in the ADaM metadata. Currently ADaM has 3 structures: the Subject-level Analysis Dataset (ADSL), the Basic Data Structure (BDS), and the Structure for Occurrence Data (OCCDS). Analysis datasets that follow the ADaM fundamental principles and other ADaM conventions but do not follow one of these 3 defined structures are considered to be ADaM datasets with a class of ADAM OTHER. Currently the ADaM standards do not cover non-subject data. A REFERENCE dataset structure has been developed for the TIG and will be considered for inclusion in future versions of ADaM.

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