This is a sample file in which I created a scheme, a concept with a preferred label, and a definition for it.
//Scheme
//label of the scheme, it has no validation
//when the concept has been modified (e.g. by adding the definition, or with other info)
// pointers from the concept to its definition and pref label
// xLabel for the concept
// reified definition for the concept
//alternative source of the definition (description instead of URI)