[cut?] Aggregation and Hierarchies

• Challenges:
  • Multilingual content may have translations, requiring relationships between indexed items.
  • Hierarchical taxonomies may differ by language.
• Examples:
  • A news article in English and its French translation need to be indexed as related.
  • “Sports” category in English corresponds to “Deportes” in Spanish.
• Solutions:
  • Metadata Linking: Tag related content with shared identifiers. For example, in a database:

    INSERT INTO content (id, locale, title)
    VALUES (1, 'en', 'Sports'), (2, 'es', 'Deportes');
    

  • Hierarchical Indices: Use Elasticsearch’s parent-child relationship for hierarchical categories.