You can designate columns as read-only, which overrides any write operations enabled for the table. To flag a column as read-only, add the #readOnly element after the data type element, separated by a comma. Note that columns marked with #key (primary key) element are read-only by default.

In the following example, the postion_title column has been designated as read-only, and the employeeID column is read-only because it has been designated the primary key.

{
"my_table":{
           "#path":[
               "https://example.com/employees",
               "https://example.com/employees/{id}"]
           "#update":"http://example.com/countries/{id}",
           "employeeID":"VarChar(32),#key",
           "position_title":"VarChar(46),#readOnly", 
           "start_year":"Integer"
           }
}