We shall prove that the resulting scheme trees have exactly the same information content as the EER schema, and the scheme-tree instances over the resulting scheme trees do not store information redundantly.
We define conceptual-model hypergraphs, cycles, and scheme trees, and then present a polynomial-time algorithm and show that it generates the fewest redundancy-free scheme trees.
Generating the fewest redundancy-free scheme trees from conceptual-model hypergraphs is NP-hard [17].
Finally, the scheme trees are transformed to Oracle Database 10g nested object types for implementation.
Our algorithm then uses the theory we developed for nested relations to generate scheme trees from the EER schema.
However, unlike their scheme, trees that have labels on branches or nodes other than characters or to define branching events were included, since in many cases these labels refer to classification categories that also reflect shared characteristics (e.g., amniotes).
On the other hand, scheme-inductive problem solving and scheme trees serve as pathways for teaching, learning and clinical problem solving in some medical curricula [ 22].
Unlike parameter searches when comparing different partitioning schemes, tree searches were not constrained to any topology and converged on higher likelihood solutions than partitioning comparisons (cf. Fig. 5 and Table 1).
Furthermore, under the existing hierarchical location database scheme, the tree structure of the location databases is static.
There is no reliable way of telling which trees were "salvaged" and which were cut down illegally, as all the logging appears to have been done at once, a convenient scheme for tree laundering.
