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In the CDASHIG v2.0 and v2.1, Data Scenario and Implementation Options are two independent columns. Implementation Options is not a concept in the CDASHIG v1.1. In order to offer one common API design for all CDASH products, these two columns are combined to become one single attribute. Example: This is an API response excerpt showing the two scenarios for domain DA:

"scenarios": [ 
  { 
    "href": "/mdr/cdashig/2-0/scenarios/DA.Denormalized", 
    "title": "DA - Denormalized - Implementation Options: Horizontal-Example", 
    "type": "CDASH Scenario" 
  }, 
  { 
    "href": "/mdr/cdashig/2-0/scenarios/DA.HorizontalGeneric", 
    "title": "DA - Implementation Options: Horizontal-Generic", 
    "type": "CDASH Scenario" 
  }, 
  ...

For the SDTMIG and the SENDIG, the general observations class serves as a container for Interventions, Events, and Findings classes. Datasets belong to their respective general observation classes, such as Exposure (EX) to Interventions, Adverse Events (AE) to Events, and Laboratory Test Results (LB) to Findings. Therefore, no datasets will be listed under General Observations Class in the API response. In other words, when applying this JSON Path against the response from /mdr/sdtmig/{version}, it yields an empty result: $..classes[?(@.name=="General Observations")].datasets.

They are available in each of the three general observation classes. For example, an excerpt from the API response for this query /mdr/sdtmig/3-2/classes/Events:

"datasets": [ 
  { 
    "ordinal": "10", 
    "name": "AE", 
    ... 
  }, 
  { 
    "ordinal": "11", 
    "name": "CE", 
    "label": "Clinical Events", 
    ... 
  }, 
  { 
      "ordinal": "12", 
      "name": "DS", 
      "label": "Disposition", 
    ... 
  }, 
  ... 
]