Now, RDBMS and SQL somewhat goes directly against the principles that forced Hadoop to be created in the first place, which is requirement to have a predefined structure (known as a schema) of the data being stored.

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Even when the program office finally acknowledged in 2011 that home visits were unworkable, the requirement of the geographic sampling structure was not modified so that when investigators started recruiting in clinics, they were forced to restrict recruitment to women living in the randomly selected neighborhoods.

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We have a contractual structure which we published in January last year, which sets out the requirement for the maintenance of a contestable framework and for us to have intervention rights in the event of supplier failure.

BBC

Health insurance in Massachusetts, for example, uses a similar structure as the Affordable Care Act, with an exchange, a personal responsibility requirement, and an employer responsibility requirement.

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Deutsche Bank had devised a way round the requirement: in 2002 it set up a group executive committee that was independent of its two-board structure.

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