The SPSS GUI offers users the ability to arrange variables in sets. Users may enable and disable sets individually, and the data editor and analysis dialog boxes only show enabled sets. Syntax does not use variable sets.
The variable sets record, if present, has the following format:
/* Header. */
int32 rec_type;
int32 subtype;
int32 size;
int32 count;
/* Exactly count bytes of text. */
char text[];
int32 rec_type;Record type. Always set to 7.
int32 subtype;Record subtype. Always set to 5.
int32 size;Always set to 1.
int32 count;The total number of bytes in text.
char text[];The variable sets, in a text-based format.
Each variable set occupies one line of text, each of which ends with a line feed (byte 0x0a), optionally preceded by a carriage return (byte 0x0d).
Each line begins with the name of the variable set, followed by an equals sign (‘=’) and a space (byte 0x20), followed by the long variable names of the members of the set, separated by spaces. A variable set may be empty, in which case the equals sign and the space following it are still present.