Most applications today still work in the world of processing data from structured and semistructured sources. They connect to SQL databases to query information or present information from JSON or XML data sources. Many applications still avoid the complication of parsing and extracting knowledge from unstructured sources such as open text fields, rich text editors, database CLOB (character large object) data types, social media news streams, and full documents from tools like Microsoft Word, Google Docs, and Adobe Acrobat.

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(Insider Story)