Sharing information between nexuses that use different classification schemes for information access control

One or more computer-readable non-transitory storage media storing instructions which, when executed by one or more processors, cause execution of a method, the method comprising:

• obtaining export data representing a first classification in a first database that is to be imported into a second database,
• the first classification including a first set of classification markings that correspond to a first classification scheme identifier of the first database and that determine access to the first database and including a first set of origin classifications in a set of databases,
• each origin classification of the first set of origin classifications including a classification scheme identifier and a set of classification markings of a respective database;
• determining that a specific origin classification of the first set of origin classifications has a specific classification scheme identifier matching a second classification scheme identifier of the second database;
• importing the specific origin classification into the second database as an imported classification.