The names of, references to, or descriptions of the methods or protocols used during an Event.

`UV light trap`, `mist net`, `bottom trawl`, `ad hoc observation | point count`, `Penguins from space: faecal stains reveal the location of emperor penguin colonies, https://doi.org/10.1111/j.1466-8238.2009.00467.x`, `Takats et al. 2001. Guidelines for Nocturnal Owl Monitoring in North America. Beaverhill Bird Observatory and Bird Studies Canada, Edmonton, Alberta. 32 pp., http://www.bsc-eoc.org/download/Owl.pdf`

Recommended best practice is describe an Event with no more than one sampling protocol. In the case of a summary Event with multiple protocols, in which a specific protocol can not be attributed to specific Occurrences, the recommended best practice is to separate the values in a list with space vertical bar space ( | ).

Sampling Protocol