Data set in the form a relational database (sql) to denote a network of service providers, service clients and recommenders

This data-set pertains to a network (i.e. graph) represented in the form of a relational data-base of service providers (nodes), service clients (nodes), service recommenders (nodes) and relationaships between then (i.e. a client used a provider, a recommender recommended a service to another client), along with some initial values of the QoS level perceived by any client whi have used a service and the reputation of a recommender. The data-set can be used for developing a reputation-based trust system.本数据集围绕一类网络（即图结构）展开，该网络以关系型数据库形式存储，涵盖服务提供者（节点）、服务客户（节点）、服务推荐者（节点）三类实体，以及实体间的各类关联关系（例如客户使用某提供者的服务、推荐者向其他客户推荐服务）；同时数据集还包含使用过服务的客户所感知到的服务质量（Quality of Service, QoS）水平初始值，以及推荐者的信誉初始值。本数据集可用于开发基于信誉的信任系统。