"A Ricardian contract can be defined as a single document that is 
a) a contract offered by an issuer to holders, 
b) for a valuable right held by holders, and managed by the issuer, 
c) easily readable (like a contract on paper), 
d) readable by programs (parsable like a database), 
e) digitally signed,
f) carrying the keys and server information, and 
g) allied with a unique and secure identifier.