According to the specification in /nfs/users/nfs_s/ss34/annot/CFAC1/99_dist/../misc/new_gff_format.lua,

a pseudogene feature
  - only contains allowed attributes (434 success/es)
  - contains a pseudogenic_transcript (434 success/es)
  - has only allowed child types (434 success/es)
  - appears as a root node (434 success/es)
  - contains all child features within its coordinates (434 success/es)
a CDS feature
  - should not have children (9057 success/es)
  - appears as child of an mRNA (9057 success/es)
  - only contains allowed attributes (9057 success/es)
a mRNA feature
  - agrees exactly with CDS/UTR coordinates of its children (9055 success/es)
  - only contains allowed attributes (9055 success/es)
  - has a coding sequence >= 3bp (9055 success/es)
  - has at least one CDS child (9055 success/es)
  - has only allowed child types (9055 success/es)
  - has non-partial CDS ending on a stop codon (9053 success/es)
  - has non-selenocysteine CDS with no internal stop codons (9055 success/es)
  - consists of less than 50% Ns (9055 success/es)
  - appears as part of a gene (9055 success/es)
a tRNA feature
  - only contains allowed attributes (110 success/es)
  - should not have children (110 success/es)
  - appears as part of a gene (110 success/es)
a snoRNA feature
  - only contains allowed attributes (14 success/es)
  - should not have children (14 success/es)
  - appears as part of a gene (14 success/es)
a snRNA feature
  - only contains allowed attributes (2 success/es)
  - should not have children (2 success/es)
  - appears as part of a gene (2 success/es)
a pseudogenic_transcript feature
  - only contains allowed attributes (434 success/es)
  - appears as part of a pseudogene (434 success/es)
  - has only allowed child types (434 success/es)
  - contains at least one pseudogenic_exon (434 success/es)
a pseudogenic_exon feature
  - appears as part of a pseudogenic_transcript (435 success/es)
  - should not have children (435 success/es)
  - only contains allowed attributes (435 success/es)
a gene feature
  - only contains allowed attributes (9185 success/es)
  - has consistent strands across all children (9185 success/es)
  - has only allowed child types (9185 success/es)
  - appears as a root node (9185 success/es)
  - contains all child features within its coordinates (9185 success/es)
a rRNA feature
  - only contains allowed attributes (4 success/es)
  - should not have children (4 success/es)
  - appears as part of a gene (4 success/es)
a polypeptide feature
  - agrees exactly with CDS of >=1 overlapping coding transcripts (9415 success/es)
  - only contains allowed attributes (9415 success/es)
  - has a required product attribute (9415 success/es)
  - overlaps the transcript it derives_from (9415 success/es)
  - must be derived_from a unique mRNA (9415 success/es)
  - appears as a root node (9415 success/es)

Encountered 0 parser warning/s.

Traversed 19208 CCs (11 feature types), checked 216680 nodes for 47 aspects.
Finished in 5.919710 s.