gistfile1.json

// http://docs.mongodb.org/manual/tutorial/model-tree-structures-with-ancestors-array/

{
  "_id" : id,
  "createdAt" : created_date,
  "modifiedAt" : modified_date,
  "accessedAt" : accessed_date,
  "name" : name,
  "description" : description,
  "owner": owner._id,
  "assignedTo" : user._id,
  "following" : [
    user1._id,
    user2._id,
    user3._id
    ],
  "due" : due_date,
  "file" : file_url or gridfs id, // includes pictures
  "related" : [
    // array of ids for related (but not immediately related) tasks/projects
    ],
  "ancestors" : [
    // array of ancestors ids
  ],
  "parent" : id
}