1. A method for assembling parametric information processing applications, comprising: receiving, by a user interface, a composition request, the composition request including a query based on tags displayed at the user interface; composing a processing graph in accordance with the query, wherein the processing graph represents an application that includes at least one component; identifying a deployment parameter of the component and requesting a value of the parameter by prompting a user via the user interface, wherein the parameter is identified from a description of the component and the value of the parameter is requested prior to running the processing graph and wherein an output description of an operator representing the parameter and an input description of an operator representing a first service are matched to each other and the output description of the operator representing the parameter and an input description of an operator representing a second service are matched to each other so that the value of the parameter corresponds to a parent node feeding into the first and second services in the processing graph; displaying, at the user interface, the processing graph, the query and the parameter value prompt at the same time; receiving the parameter value; applying the parameter value to the application; and deploying the application with the parameter value in an execution environment.