Concept status machine

Concepts and issues can have the following statusCode:

• new: item just created and is new and work in progress to become a draft/finalized item/issue. Beyond the author, nobody should look at this item/issue unless it's status code is draft or finalized.
• draft: item is draft, not ready for production use
• final: item finalized, ready for approval
• rejected: item is rejected
• Cancelled: item is cancelled
• Deprecated: item is deprecated, i.e. item should be avoided to be used, typically because it will be or has been superseded