The attribute value will be one of AST__INTTYPE (for integer),
AST__SINTTYPE (for
INTEGER2),
AST__BYTETYPE (for
bytes),
AST__DOUBLETYPE (for double
precision floating point), AST__FLOATTYPE (for single
precision floating point), AST__STRINGTYPE (for character string),
AST__OBJECTTYPE (for AST Object pointer), AST__POINTERTYPE (for
arbitrary C pointer) or AST__UNDEFTYPE (for undefined values
created by
AST_MAPPUTU).
AST A Library for Handling World Coordinate Systems in Astronomy