Degree of establishment mapping

[LienReyserhove]

The degree of establishment for a species is already mapped to the Blackburn et al. 2011 vocabulary. This is an example of the content:

degree_of_establishment	records
B2	5
B3	1
C0	6
C0 - C3	1
C1 - C3	1
C3	1
C3, D1, D2	1
D2, E	1
E	12

A few species are categorized under more then one category. My first reaction was to map each catogory per species as a separate row, but this might give a wrong impression when interpreting the data. I think that, by including different categories, the author means that we are not certain about the exact degree of establishment. Therefore I think we should map the categories together:

degree_of_establishment	mapping
C0 - C3	C0, C1, C2, C3
C1 - C3	C1, C2, C3
C3, D1, D2	C3, D1, D2

@peterdesmet?

[peterdesmet]

I think @timadriaens @qgroom should decide this:

If a taxon is mapped to a range or multiple Blackburn degree_of_establishment values, how should that be expressed in Darwin Core: have one row for each degree_of_establishment listed?

[qgroom]

Perhaps you have a specific case, but in my head there should only every be one for a specific time period and area.

[qgroom]

If within a time period and area there are both temporary and established populations, then I think we would default to the most established of Blackburn's categories.

[timadriaens]

I agree, the framework is more or less hierarchical in the sense that a species "achieves" a certain degree of establishment and that is also what is relevant for policy and management