Changes

highlight recursive entities
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|Answer | A potential solution to the problem
 
|Answer | A potential solution to the problem
 
|AnswerType | The class of answer suitable for the problem or question
 
|AnswerType | The class of answer suitable for the problem or question
|Survey | An event in time instance, at which Answers to Questions or problems are gathered
+
|Survey | An event in time instance, at which Answers to Questions or problems are gathered. Survey events can reference other surveys, such as follow-up Surveys (a recursive entity).
 
|Response | An event in time instance, at which the Student provides an answer to a question on a Survey or Quiz, etc.
 
|Response | An event in time instance, at which the Student provides an answer to a question on a Survey or Quiz, etc.
 
|School | An organization
 
|School | An organization
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====Questionnaire====
 
====Questionnaire====
 
: '''''A collection of questions that might be used in a Survey, Quiz, Exam, etc.''''',
 
: '''''A collection of questions that might be used in a Survey, Quiz, Exam, etc.''''',
:: or when its key appears in the Category field,
+
:: or when its key appears in the Category field making a recursive entity,
 
: '''''a group, class, or category of Questionnaires'''''
 
: '''''a group, class, or category of Questionnaires'''''
 
{{Definition_table
 
{{Definition_table
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}}
 
}}
 
====Survey====
 
====Survey====
: '''''An event in time instance, at which Answers to Questions or problems are gathered'''''
+
: '''''An event in time instance, at which Answers to Questions or problems are gathered. Survey events can reference other surveys, such as follow-up Surveys''''' (a recursive entity).
 
{{Definition_table
 
{{Definition_table
 
|ID | primary key
 
|ID | primary key