Programming languages usually contain abstractions for defining and manipulating data structures or controlling the flow of execution. Contrast that with described-expression, which has the advantage of using Meaning Coordinates,  Ideas, Proofs-of-Trust(intent), Proofs-of-Performance(resource-management), and Ownership/Access Rights, all stored on an advanced ledger system (Nebulo). The result of described-expression is higher probability of clarity in understanding and precision implementation of what the intended machine behaviors are.