Updated accressRights types definitions as agreed in the RAB meeting (07Aug2015):

Open: refers to online data that may be electronically accessed free of charge with no restrictions imposed on the user.

Conditional: refers to online or offline data that may be accessed free of charge, providing certain conditions are met. For example, where:
f

ree registration is required to access data online;
data can only be accessed at its physical location;
formal permission to access the data must be granted.

Details of the conditions may be provided as a free text value in accessRights.

Restricted: refers to online or offline data where access to the data is restricted. For example, where:

access is only available to a particular group of users;
an embargo period applies;
a fee applies

.
Details of the restrictions may be provided as a free text value in accessRights.