Text Processing Architecture

Open Search Text Server
http://www.opentext.com/what-we-do/industries/legal/legal-content-management-edocs/opentext-search-server-edocs-edition

Noggle
https://www.noggle.online/knowledgebase/cognitive-search-engine/

http://blogs.forrester.com/mike_gualtieri/17-06-12-cognitive_search_is_the_ai_version_of_enterprise_search
Cognitive Search Is The AI Version Of Enterprise Search

https://www.elastic.co/guide/en/elasticsearch/guide/current/index.html