Content can be broadly defined as the principle matter such as written information, illustrations etc. available on a website. However, content may vary from type to type across adaptations of Sunbird. For example, on DIKSHA, an adaptation of Sunbird, chief content types are: course, textbook, lesson, worksheet, collection and story. Similarly, other instances of Sunbird can have personilzed content types to suit custom requirements.
Course is content provided in sequence, broken down in modules, open for enrolment and completion for a duration. You can attach prerequisites for a course, and it may contain assessments.
Book is a collection of content units. It can be compiled or curated from school textbooks that conform to syllabi of state or central boards, for a grade, in the said medium of instruction and language. Text books may also be compiled separately without adhering to any syllabus, but forming a logical unit of content pieces for the given subject matter.