Metis Smart Modeling - Models

Now that the ground work of the model concept is laid down, it is necessary to understand a bit how such a model works in the Metis environment. As described in figure [[:File:Model_Exec_1.png|Model execution overview]], outside of the masks, a model is built on specific objects. Each model includes at least one “group of rules”, which is a container for individual rules. Those rules are the logic part of the models. Each rule uses input values (variables, attributes, positions) coming from the masks, default or calculated information to process a logic “formula”. A Group of rule can include as many rules as necessary, with the only constrain that the result of a given rule will only be available in the next group of rules in the process. As described in figure [[:File:Model_Exec_2.png|Group of rules execution overview]], a Group of rules feeds in input values which are instantiated before its execution. Once inside, all rules will use those values to process the formulas. When all rules are processed, the resulting variables and/or material positions are prepared for the next Group of rules.Before starting the execution of the next Group of rules, the engine instantiates the new input values and lets the different rules included in the group feed on them.  

Now that the ground work of the model concept is laid down, it is necessary to understand a bit how such a model works in the Metis environment. As described in figure [[:File:Model_Exec_1.png|Model execution overview]], outside of the masks, a model is built on specific objects. Each model includes at least one “group of rules”, which is a container for individual rules. Those rules are the logic part of the models. Each rule uses input values (variables, attributes, positions) coming from the masks, default or calculated information to process a logic “formula”. A Group of rule can include as many rules as necessary, with the only constrain that the result of a given rule will only be available in the next group of rules in the process. As described in figure [[:File:Model_Exec_2.png|Group of rules execution overview]], a Group of rules feeds in input values which are instantiated before its execution. Once inside, all rules will use those values to process the formulas. When all rules are processed, the resulting variables and/or material positions are prepared for the next Group of rules.Before starting the execution of the next Group of rules, the engine instantiates the new input values and lets the different rules included in the group feed on them.  

For example, when configuring a computer, the selection of a specific CPU will influence the list of compatible motherboards. Only when the appropriate one is determined, will the number of specific ports (like USB) be available and used for further configuration.

For example, when configuring a computer, the selection of a specific CPU will influence the list of compatible motherboards. Only when the appropriate one is determined, will the number of specific ports (like USB) be available and used for further configuration.