Exons: The exons that compose this transcript. This field should be unset for genomes where transcript splicing does not occur, for example prokaryotes.
Introns are regions of the transcript that are not included in the spliced RNA product. Though not explicitly modeled here, intron ranges can be deduced; all regions of this transcript that are not exons are introns.
Exonic sequences do not necessarily code for a translational product (amino acids). Only the regions of exons bounded by the codingSequence correspond to coding DNA sequence.
Exons are ordered by start position and may not overlap.