Table 1.

Glossary

Term	Definition
Darwin Core (DwC)	A specification released by TDWG that includes a glossary of terms intended to facilitate the sharing of information about biological diversity by providing identifiers, labels, and definitions (in this document, unless otherwise specified, we refer to DwC Version 2021-03-29) *3
Darwin Core Archive (DwC-A)	A dataset that 1) contains data about species occurrences, checklists, sampling events and/or material sample data and 2) makes use of Darwin Core terms to qualify fields. DwC-A records comprise a set of text (CSV) files with a simple descriptor record (i.e. meta.xml) to inform others how your files are organized. The format is defined in the Darwin Core Text Guidelines. It is the preferred format for publishing data to the GBIF and OBIS networks.
Darwin Core Extension	A list of defined keys to be used in combination with/in addition to DwC keys to create a more complete metadata record for a given situation. *4
Minimum Information about any (x) Sequence (MIxS)	A collection of checklists released by the GSC to define both the minimal and extended metadata associated with any sequencing record (in this document, unless otherwise specified, we refer to MIxS Version 5). *5
MIxS core	A MIxS checklist providing minimal (and extended) sets of metadata keys directly related to the sequences.
MIxS environmental packages	A collection of MIxS checklists providing extended sets of metadata keys about different sampling environments, deemed important by the MIxS user community.
Simple Knowledge Organization System Reference (SKOS)	A common data model for sharing and linking knowledge organization systems via the Web. It provides a lightweight, intuitive language for developing and sharing new knowledge organization systems.
Simple Standard for Sharing Ontology Mappings (SSSOM)	A catalog of minimal and standard metadata elements for the dissemination of mappings between ontology terms.