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table_datapoints.md

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Table: datapoints

Description: Datapoints are an abstract concept that connect series conditions, conditions and datums together. Think of them as equivalent to a row in a data table.

'NumValues' section in the ThermoML Schema

ThermoML Schema

Example data of a 'NumValues' in the 'PureOrMixtureData' section of a ThermoML file

ThermoML Example

MySQL 'datapoints' table structure

MySQL Structure

MySQL Fields

  • id: datapoints primary key (auto-generated and unique)
  • dataset_id: foreign key (datasets table) of the dataset the dataseries is part of
  • dataseries_id: foreign key (dataseries table) of the dataseries the condition belongs to
  • row_index: the index of a datapoint in a dataseries
  • updated: datetime last updated

Comments

The dataset_id field was added as a convenience to allow statistics generation. Formally, the link between datasets and datapoints is:

  • datapoints are linked to dataseries
  • dataseries are linked to datasets