TitleBodyTechnical Expertise RequiredCostAdditional Information
Create a data dictionary

A data dictionary provides a detailed description for each element or variable in your dataset and data model. Data dictionaries are used to document important and useful information such as a descriptive name, the data type, allowed values, units, and text description. A data dictionary provides a concise guide to understanding and using the data.

Describe the contents of data files

A description of the contents of the data file should contain the following:

  • Define the parameters and the units on the parameter
  • Explain the formats for dates, time, geographic coordinates, and other parameters
  • Define any coded values
  • Describe quality flags or qualifying values
  • Define missing values
Describe the units of measurement for each observation

The units of reported parameters need to be explicitly stated in the data file and in the documentation. We recommend SI units (The International System of Units) but recognize that each discipline has its own commonly used units of measure. The critical aspect here is that the units be defined so that others understand what is reported.

Do not use abbreviations when describing the units. For example the units for respiration are moles of carbon dioxide per meter squared per year.