Conceptual Model

classDiagram
  Dataset "1" *-- "0..*" Series

  Dataset "*" --> "1" DataStructure
  Series "1" *-- "0..*" Observation

  class Dataset {
     A collection of series
  }

  class Series {
     Related observations sharing common characteristics
  }

  class Observation {
     Observed or measured values
  }

  class DataStructure {
     Defines the valid concepts and allowed content for a dataset
  }