So far, no hierarchical elements were taken into account for classification. However, if classification is not possible using the flat mechanism, hierarchical elements may resolve the conflict.
One of the available hierarchical methods is parent classification. If parent and child classes compete for the same documents, the documents are rather assigned to the children. If there are several children with similar confidence levels, the parents can decide which class is the correct one.
Parent classification uses the following additional values defined at the project level.
- A parent threshold (50 percent by default)
- A parent distance (10 percent by default).
In the following figure, classification occurs to the medium branch, and the child class with 80 percent confidence wins.
For more information about hierarchical classification elements, see About Class-Level Subtree Classification.