This page is under construction and subject to significant revision.

Creating the management classification (nub)

The management classification (nub) is assembled as a separate checklist. The classification is stored in the name_usage table with parent-child relationships (analogous to taxon_concept in GBIF data portal schema) with combinations of name usages from all checklists. This is done by:

1. Iterating through each of the lexical groups
2. For each lexical group retrieving the related classifications
3. All checklists are given a ranking. All name usages inherit the ranking from their checklist initially but the ranking for a single classification can be manually overridden
4. Using the ranking described in 3) for all the classifications for a single lexical group, a classification is assembled using an algorithm. For example these two classifications are associated with the same lexical group:

from which we assemble:

This assembling algorithm makes use of ranking for individual classifications (a classification is a hierarchy captured in name usage table).