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|Actor chooses to add a subject. ||System returns page with editable fields. || Course Code, Course Name
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|Actor chooses to save changes. ||System validates fields and persists changes to db. ||
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|Actor types professor username into search box and chooses to search. ||System searches db and LDAP for username and returns professor's subjects (if found). || Professor username
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|Actor changes chooses to edit a subject. ||System returns page with editable fields populated with chosen subject's details. || Course Code, Course Name
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|Actor edits fields and chooses to save changes. ||System validates fields and persists changes to db. ||
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