human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "refinement of information flow architectures"
  Abstract: A calculus is presented for the stepwise refinement of abstract information flow architectures. We give a mathematical model for information flow components based on relations between input and output communication histories, and describe system architectures using two views: the glass box view is a network of basic components, while the black box view regards the network itself as a component. This allows us to hierarchically compose systems. The calculus consists of basic rules to add or remove components and channels, and to replace components by subnetworks and vice versa. The correctness of the rules is justified by the refinement relation on the black box view of architectures.

Connected through hyperedge HE-1 (induced by source paper "montiarc architectural modeling of interactive distributed and cyber physical systems"):
  with members:
    - "towards a system model for uml the structural data model"
    - "efficient editor generation for compositional dsls in eclipse"
    - "towards a family based analysis of applicability conditions in architectural delta models"
    - "system model semantics of class diagrams"
    - "monticore a framework for compositional development of domain specific languages"
    - "modelling automotive function nets with views for features variants and modes"
    - "delta modeling for software architectures"
    - "monticore modular development of textual domain specific languages"

Connected through hyperedge HE-2 (induced by source paper "modeling variants of automotive systems using views"):
  with members:
    - "modelling automotive function nets with views for features variants and modes"
    - "view based modeling of function nets"
    - "refinement of pipe and filter architectures"

Connected through hyperedge HE-3 (induced by source paper "software and system modeling based on a unified formal semantics"):
  with members:
    - "exemplary and complete object interaction descriptions"
    - "state based service description"
    - "enhancing the syslab system model with state"
    - "towards a formalization of the unified modeling language"
    - "a stream based mathematical model for distributed information processing systems the syslab system model"
    - "towards a precise semantics for object oriented modeling techniques"
    - "automata describing object behavior"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.SE(Software Engineering)