The Basic Comparison, SEC XBRL Filing example takes the Basic Example, SEC XBRL Filing, duplicates the XBRL instance and company extension XBRL taxonomies, and creates a very comparable set of three XBRL instances and XBRL taxonomies. Each company's XBRL taxonomy is distinct as is the XBRL instance. What I have not done yet is change the values in the XBRL instances in order to make the XBRL instances look different. The point of this comparison is to show that comparison is possible, what makes XBRL instances comparable, and what takes away from comparability. No judgment is being made about what should or should not be comparable; this is an exercise in showing how to use the XBRL technology to achieve comparabilty. It is up to the domains applying the XBRL technology to determine the comparability they desire.