Data items in the MA_QA_METRIC_LOCAL_PAIRWISE category captures the
               details of the local QA metrics, calculated at the pairwise residue level. 
               In cases where the metric is symmetric, it is enough to store just one value per pair. 
               For asymmetric metrics, the order of residues is expected to be meaningful 
               (e.g. PAE where PAE_ij is defined by aligning residue i (label_*_1) and measuring 
               the error on residue j (label_*_2)). 
               In all cases, it is perfectly valid to only provide values for a subset of residue pairs.
               Data in this category is expected to be very large and can be extracted into a 
               separate file which is linked to the main file using the categories 
               ma_associated_archive_file_details or ma_entry_associated_files with file_content 
               set to "QA metrics".