A list (concatenated and separated) of identifiers (publication, global unique identifier, URI) of genetic sequence information associated with the Occurrence.

`http://www.ncbi.nlm.nih.gov/nuccore/U34853.1`, `http://www.ncbi.nlm.nih.gov/nuccore/GU328060 | http://www.ncbi.nlm.nih.gov/nuccore/AF326093`

http://rs.tdwg.org/dwc/terms/