#include <stdio.h>
#include <string.h>

typedef struct _Typle Tuple;
typedef struct _Attribute Attribute;

struct _Tuple
{
   char *key;
   int value;
};

struct _Attribute
{
   char *name;
   struct _Tuple **tuples;
};

static struct _Tuple _first_tuple =
{
   "key1",
   1
};

static struct _Tuple _second_tuple =
{
   "key2",
   2
};

static struct _Tuple _third_tuple =
{
   "key3",
   3
};

static struct _Tuple *tuples[] =
{
	&_first_tuple,
	&_second_tuple,
	&_third_tuple,
	NULL
};

static const struct _Attribute attrib1 =
{
   "first attrib",
   tuples
};

static struct _Tuple _first_tuple2 =
{
   "key1-2",
   1
};

static struct _Tuple _second_tuple2 =
{
   "key2-2",
   2
};

static struct _Tuple _third_tuple2 =
{
   "key3-2",
   3
};

static struct _Tuple *tuples2[] =
{
	&_first_tuple2,
	&_second_tuple2,
	&_third_tuple2,
	NULL
};

static const struct _Attribute attrib2 =
{
   "second attrib",
   tuples2
};

static const struct _Attribute *attributes[] = 
{
   &attrib1,
   &attrib2,
   NULL
};

int main(void)
{
   int i;
   struct _Attribute *attrib;
   
   for (i = 0; attributes[i]; i++)
     {
	int j;
	struct _Tuple *tuple;
	
	attrib = attributes[i];
	printf("%s\n", attrib->name);
	
	for (j = 0; attrib->tuples[j]; j++)
	  {
	     tuple = attrib->tuples[j];
	     printf("  %s\n", tuple->key);
	  }
     }
      
   return 0;
}