usebb2drupal-8.x-1.0-rc1/migrations/usebb_category.yml

id: usebb_category
label: UseBB categories
source:
  plugin: usebb_category
  constants:
    taxonomy: forums
    parent: 0
    forum_container: 1
process:
  tid: { }
  vid: 'constants/taxonomy'
  name: name
  description: { }
  weight: sort_id
  parent: 'constants/parent'
  'forum_container/value': 'constants/forum_container'
destination:
  plugin: entity:taxonomy_term