observation_period.json

[
    {
        "type": "integer", 
        "name": "observation_period_id", 
        "mode": "required", 
        "description": "A unique identifier for each observation period."
    }, 
    {
        "type": "integer", 
        "name": "person_id", 
        "mode": "required", 
        "description": "A foreign key identifier to the person for whom the observation period is defined. The demographic details of that person are stored in the person table."
    }, 
    {
        "type": "date", 
        "name": "observation_period_start_date", 
        "mode": "required", 
        "description": "The start date of the observation period for which data are available from the data source."
    }, 
    {
        "type": "timestamp", 
        "name": "observation_period_start_datetime", 
        "mode": "required"
    }, 
    {
        "type": "date", 
        "name": "observation_period_end_date", 
        "mode": "required", 
        "description": "The end date of the observation period for which data are available from the data source."
    }, 
    {
        "type": "timestamp", 
        "name": "observation_period_end_datetime", 
        "mode": "required"
    }, 
    {
        "type": "integer", 
        "name": "period_type_concept_id", 
        "mode": "required", 
        "description": "A foreign key identifier to the predefined concept in the Standardized Vocabularies reflecting the source of the observation period information"
    }
]