How to modify preorder tree traversal algorithm to handle nodes with multiple parents?

Posted by poldo on Stack Overflow See other posts from Stack Overflow or by poldo
Published on 2010-04-21T09:01:25Z Indexed on 2010/04/21 10:43 UTC
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I've been searching for a while now and can't seem to find an alternative solution. I need the tree traversal algorithm in such a way that a node can have more than 1 parent, if it's possible (found a great article here: Storing Hierarchical Data in a Database). Are there any algorithms so that, starting from a root node, we can determine the sequence and dependencies of nodes (currently reading topological sorting)?

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