internal_attach_value
extern void internal_attach_value(property_t *, value_t *);
internal_attach_value(p, v);
internal_attach_value(iprop, ival);
internal_attach_value(p, v);
internal_attach_value(*p, v);
internal_attach_value(*p, v);
internal_attach_value(prop, v);
internal_attach_value(p, v);
internal_attach_value(p, val);