According to the specification in /nfs/users/nfs_s/ss34/annot/CFAC1_unassembled/99_dist/../misc/new_gff_format.lua,

a contig feature
  - appears as a root node (427 success/es)
  - should not have children (427 success/es)
  - only contains allowed attributes (427 success/es)
a CDS feature
  - should not have children (3470 success/es)
  - appears as child of an mRNA (3470 success/es)
  - only contains allowed attributes (3470 success/es)
a tRNA feature
  - only contains allowed attributes (32 success/es)
  - should not have children (32 success/es)
  - appears as part of a gene (32 success/es)
a gene feature
  - only contains allowed attributes (3478 success/es)
  - has consistent strands across all children (3478 success/es)
  - has only allowed child types (3478 success/es)
  - appears as a root node (3478 success/es)
  - contains all child features within its coordinates (3478 success/es)
a mRNA feature
  - agrees exactly with CDS/UTR coordinates of its children (3446 success/es)
  - only contains allowed attributes (3446 success/es)
  - has a coding sequence >= 3bp (3446 success/es)
  - has at least one CDS child (3446 success/es)
  - has only allowed child types (3446 success/es)
  - has non-partial CDS ending on a stop codon (3353 success/es)
  - has non-selenocysteine CDS with no internal stop codons (3446 success/es)
  - consists of less than 50% Ns (3446 success/es)
  - appears as part of a gene (3446 success/es)
a polypeptide feature
  - must be derived_from a unique mRNA (3446 success/es)
  - agrees exactly with CDS of >=1 overlapping coding transcripts (3446 success/es)
  - only contains allowed attributes (3446 success/es)
  - has a required product attribute (3446 success/es)
  - overlaps the transcript it derives_from (3446 success/es)
  - has only allowed child types (2430 success/es)
  - appears as a root node (3446 success/es)

Encountered 0 parser warning/s.

Traversed 7778 CCs (6 feature types), checked 83204 nodes for 30 aspects.
Finished in 3.464139 s.