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View Prior Art for Claim 00018

The computer readable medium of Claim 13, further comprising instructions for:analyzing the set of hierarchical markup documents, wherein each hierarchical markup document is representable by a hierarchical tree structure;

generating, based on the analyzing, the shared hierarchical markup document;

comparing each hierarchical markup document in the set of hierarchical markup documents with the shared hierarchical document; and

generating, based on the comparing, the plurality of difference hierarchical markup documents.