Tansley weging and its mapping if needed

[damianooldoni]

Tansley weging represents a numeric transformation of the Tansley codes on a scale from 1 to 6. This is how Tansley codes are mapped to Tansley numeric classes:

Tansley Code	Tansley Weging
o	1
z	1
la	3
f	2
a	4
cd	5
d	6

Is this a standard conversion? On internet I see a conversion to a scale from 1 to 9, i.e. a one-to-one conversion.

However, I am thinking to NOT map this column to DwC. But in case we will do, proposed English translation: Tansley numeric class.