2.1 Introduction
 2.2 Structure of the SDDS Header
  2.2.1 Data Set Description
  2.2.2 Tabular-Data Column Definition
  2.2.3 Parameter Definition
  2.2.4 Array Data Definition
  2.2.5 Header File Include Specification
  2.2.6 Data Mode and Arrangement Defintion
 2.3 Structure of SDDS ASCII Data Pages
 2.4 Structure of SDDS Binary Data Pages