The IBM Blockchain Platform documentation contains over 800 links to a variety of topics. IBM Cloud is in the process of changing our documentation linkage requirements. Beginning 5 February 2019, some links in the IBM Blockchain Platform documentation might be unavailable. The issue is expected to be corrected by 11 February 2019. During this time, it might be difficult to navigate through the documentation. We apologize for any inconvenience this change might cause.