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Valid Types

HDS divides objects into two classes, primitive and structured. The former contain simple data such as numbers or characters, whereas the latter contain collections of primitives. The valid primitive types recognised by HDS are,

  Type         Equiv Fortran      Range
  _LOGICAL     LOGICAL*4          .TRUE., .FALSE.
  _UBYTE       not supported      0..255
  _BYTE        BYTE               -128..127
  _UWORD       not supported      0..65535
  _WORD        INTEGER*2          -32768..32767
  _INTEGER     INTEGER*4
  _REAL        REAL*4
  _DOUBLE      DOUBLE PRECISION
  _CHAR*n      CHARACTER*(n)

Any type not in the above list will be assumed to be a structured type.

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