| document | to compare with current one |
| header | gdcm::File* of the file to deal with |
| group | tag group number we want restrict on a given value | |
| elem | tag element number we want restrict on a given value | |
| value | value to be checked to exclude File | |
| op | operator we want to use to check |
| key | Target tag we want restrict on a given value | |
| value | value to be checked to exclude File | |
| op | operator we want to use to check |
1.4.4