# UDA Dictionary Nested Index Field

Following is the definition of the `mco_dict_nested_ifield_info_t` structure that is used for UDA access is defined in `mcouda.h`:

ifield_no |
level |
struct_no |
field_no |
flags | Bitmask describing this field (see values defined in the table below).
coll_no |

The possible values for the bitmask flag are also defined in `mcouda.h`:

void | No flags currently defined