CAPE-ModE System Architecture

In this section, detailed specifications for the different components and layers of CAPE-ModE will be presented. The main components of CAPE-ModE can be summarized as Model Repository in UME, Model Management System (MMS), Modeling User Interface (MUI) using Model Manipulation Eanguage (MME), Model Query Eanguage (MQE), Model Translator (MT), and Application Programming Interface routines (APIs). 

The proposed model repository is composed of model base and metamodel base (Modelbase - MB / Metamodelbase - MMB). Example of the metamodel element from the plant design could be a class that represents the behavior of fluids (Gabbar [a], 2000), while pump class 

JavaTM is used to develop the modeling user interface so that users can manipulate and browse the model (or model elements) via normal Internet browser. Alternatively, MMS can be used to directly access the model elements within the model repository. MUI has mainly three windows Wl, whieh accepts the input user instructions (MML / MQL), 

which displays the results of the execution of the user instructions and commands, and W3, which displays the models and model elements in visual form so that user can select interactively from this list to perform any required model manipulation. MUI includes an intelligent parser that provides online syntax options for both the syntax of the instructions and the parameters retrieved from the central model repository. For example, while user is typing Gr system shows a list of instructions that start with Gr i.e. Grant Access (based on the user profile and domain). Once user selects Grant Access , system will type Model Name= , followed by a list of existing model names available in the model repository (based on the user permissions and security levels). Sample functions offered by MUI can be viewed in table 5-2. 

User Instructions Accept user instructions (MML / MQL) User instructions syntax checking (Parsing) 

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Figure 5-3 shows the system architecture of the computer-aided plant enterprise modeling environment (CAPE-ModE). The model will be stored within a model repository where both model and metamodel elements will be stored in the form of unified modeling language (UML). 

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