Tabling the Overlap Discussion

The problem of overlapping markup has often been addressed using variant syntaxes, milestones, standoff markup and other means. This proposal combines the use of co-indexed milestones with a table structure in a database, plus CONCUR namespaces and "common location" (markup tokens that have no intervening PCDATA) information to illustrate one way to "parse" XML with more information than is available using standard markup. The result is a data structure that can be explored to determine the best data structure for overlapping hierarchies.