Assertion: unit's definition | /r/CapableOf | follow two principal strands
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text: The International Bureau of Weights and Measures (BIPM) has described SI as "the modern form of metric system".:95 Changing technology has led to an evolution of the definitions and standards that has followed two principal strands – changes to SI itself, and clarification of how to use units of measure that are not part of SI but are still nevertheless used on a worldwide basis.