This paper proposes a novel approach to the processing of global queries in a tight federation of heterogeneous relational databases. It is based on query correspondence assertions, which are declarative rules that describe semantic correspondences between different relational schemas. A mediator uses these rules to translate queries against the federated schema into semantically contained sequ...

In this paper, we have addressed the complex problem of determining a recovery line for cluster federation and have proposed a fast recovery algorithm to handle failures in cluster federations. The main feature of the proposed algorithm is that it can be executed simultaneously by all clusters in the cluster federation. Besides, the number of trips to the stable storage necessary for executing ...

Information federations promise an enhanced collaboration between individual stakeholders in the life cycle of commercial products, including software and hardware products from arbitrary business sectors. However, information sharing across corporate borders must be controlled by tailored mechanisms for enforcing individual business confidentiality and integrity requirements. One influential c...

The newly developed approach on token-based payments introduces an integration of payments with current schemes for Identity Federations based on SAML. This new design utilizes an established federation infrastructure as well as its protocols. Only relevant mechanisms to support the payment on the federation infrastructure level are

This essay explores the distinction between federations and alliances and asks the question: When will states choose to federate rather than ally? William Riker (1964) argues that a necessary condition for a federal state’s formation is that those offering the federal bargain must seek to "expand their territorial control, usually either to meet an external military or diplomatic threat or to p...

Sports federations are non-profit organizations that compete for members and resources. These obliged to cooperate on the environment, nature conservation, sustainability together with other public bodies. Given this situation necessity differentiate themselves from commercial sports providers, it is essential create loyalty. The objective of article provide an in-depth study variables explain ...

Modern plural societies characterized by ethno-cultural diversity are forming demand for effective balance of inter-group relations. The institutionalization language policy is becoming the way inter-ethnic relations regulation. problem implementation relevance in modern European federations, boundaries which overlap on linguistic communities’ residence. In such cases federal center includes im...