1. A computer-implemented system providing access to network services data of a target system, the computer-implemented system comprising a hardware processor configured to implement: an application interface configured to interface with the target system, the target system exposing a first and a second data through a plurality of global computer network services, the application interface further configured to define a query of the first exposed data and second exposed data along a federated common data, the application interface of the target system using in common one of the plurality of global computer network services across two or more applications, such that the application interface reuses global computer network services among the two or more applications for the target system; and a mapping member configured to create a map, along the federated common data, between (a) the query of the exposed data by the application interface, and (b) syntax of objects in a subject application, the mapping member enabling the subject application to access object instances generated in response to the defined query; wherein in implementing the query, the application interface is configured to chain calls to at least two of the global computer network services of the target system to form an object representing a combined view of the first exposed data and second exposed data, in a manner resulting in a presentation of the combined view along the federated common data of the first exposed data and the second exposed data from the target system; wherein the at least two global computer network services are previously provided by the target system such that the application interface reuses existing assets of the target system.