Definition of GGBN Terms

Definition	An existence of a dwc:Organism at a particular place at a particular time. (Source https://dwc.tdwg.org/terms/#occurrence)
Comments	This term describes the top level of aggregated information. One ore more records can form an occurrence. Occurrences can be related to each other, e.g. collected tissue from the same organism at a different time or as parasite/host relationship. Related records that form together one occurrence are marked as such in GGBN.
Examples	two tissue samples and one specimen, the two tissue samples being derived from the same specimen 200 DNA samples, 200 cultures and one environmental sample, each of the DNA samples being derived from one of the 200 cultures, which are all derived from the same environmental sample

Definition	An entity that can be identified, exists for some period of time, and consists in whole or in part of physical matter while it exists. (Source https://dwc.tdwg.org/terms/#materialentity)
Comments	This term describes any kind of a physical DNA, tissue or environmental sample, preserved specimen, fossil, or exemplar from living collections
Examples	an instance of a herbarium sheet with its attached plant specimen an instance of a frozen tissue sample a specific water sample a particular wolf in a zoo a specific deep-frozen DNA sample

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