The Lncs Journal Transactions On Large-scale Data And Knowledge-centered Systems Focuses On Datamanagement, Knowledge Discovery, And Knowledge Processing, Which Are Core And Hot Topicsin Computer Science. Since The 1990s, The Internet Has Become The Main Driving Force Behindapplication Development In All Domains. An Increase In The Demand For Resource Sharing(e.g., Computing Resources, Services, Metadata, Data Sources)across Different Sites Connected Through Networks Has Led To An Evolution Of Data- And Knowledge-managementsystems From Centralized Systems Todecentralized Systems Enabling Large-scale Distributed Applicationsproviding High Scalability.this, The51stissue Of Transactions On Large-scale Data And Knowledge-centered Systems, Contains Five Fully Revised Selected Regular Papers.