constant TAXONOMY_HIERARCHY_SINGLE in Drupal 8
Denotes that one or more terms in the vocabulary has a single parent.
Deprecated
in drupal:8.2.0 and is removed from drupal:9.0.0. Use \Drupal\taxonomy\VocabularyInterface::HIERARCHY_SINGLE instead.
See also
https://www.drupal.org/node/2807795
File
- core/
modules/ taxonomy/ taxonomy.module, line 37 - Enables the organization of content into categories.
Code
const TAXONOMY_HIERARCHY_SINGLE = 1;