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From Dataloy API v3.15.0 through the DataControl object it is  is possible to control data access for a target user(s) for a given object connected to the target by checking if the user(s) belongs to a given role.

For example, if we want to limit access for the captain of a vessel to only be able to view voyages consisting only of their vesselsvessel, a DataControl object like this has to be posted:

{
    "matcherTarget": "User",
    "matcherAttributeTarget": "key",
    "objectName": "Voyage",
    "attribute": "voyageHeader.vesselCodes.masterUser",
    "dataControlRoleValues":[
    	{"role": "MASTER_ONLINE_VESSEL"}
    ]
}

• matcherTarget defines the Dataloy object that has to be used as target object

• matcherAttributeTarget defines the attribute in the matcherTarget object that has to be used against the attribute of the object (objectName)

• objectName the Dataloy object that has to be applied the access control

• attribute the attribute name that links the Dataloy object with the target object

• dataControlRoleValues list of SecurityRole that the DataControl will be applied

In the above example if an User that belong to the SecurityRole "MATER_ONLINE_VESSEL" make a query to the endpoint Voyage, the server will return only the voyages that has voyageHeader.vesselCodes.masterUser = {the user that made the query}