24. The computer-readable storage medium of claim 23 , further comprising operational instructions that, when executed by a processor, cause the processor to associate explicitly a first set of elements of the plurality of elements of the tree-structured data with explicit meta-data levels.
24. The computer-readable storage medium of claim 23 , further comprising operational instructions that, when executed by a processor, cause the processor to associate explicitly a first set of elements of the plurality of elements of the tree-structured data with explicit meta-data levels. 25. The computer-readable storage medium of claim 24 , further comprising operational instructions that, when executed by a processor, cause the processor to associate by inheritance a second set of elements of the plurality of elements of the tree-structured data with explicit meta-data levels of closest ancestor elements of the first set of elements.