Importance

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Abstract

The present invention allows traversal of net occurrences of a light weight occurrence model. In traversing down, a port iterator is preferably used, while in traversing up a port instance iterator is preferably used. The selected iterator is initialized with information about the current occurrence net from the inventive occurrence node that describes the occurrence net's owner and folded model describer. In traversing up, the iterator finds the next port that connects to the folded model net indicated by the describer used during initialization. Then, using information stored in the model, the iterator finds the occurrence net object that is one level higher in hierarchy than the original occurrence net object. In traversing down, the iterator finds the next port instance that connects to the folded model net indicated by the describer used during initialization. Then, using information stored in the model, the iterator finds the occurrence net object that is one level lower in hierarchy than the original occurrence net object.

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First Claim