is#document_indexation_or_search__document_search__document_structuration  "indexation" also refers to structuring with via markup tags
  supertype:  is#IR_task  is#document_management_task
  subtype:  is#document_indexation
  subtype:  is#document_search
  subtype:  is#keyword_based_document_indexation_or_search
  subtype:  is#metadata_based_structuration_or_search
  subtype:  is#knowledge_based_document_indexation_or_search
     subtype:  is#knowledge_based_document_search
        subtype:  km#conceptual_clustering_from_documents
           subtype:  km#conceptual_clustering_from_emails

1 statement is about an indirect instance of is#document_indexation_or_search (km#conceptual_clustering_from_emails): km#graph18_on_article
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