| http://www.w3.org/ns/prov#value | - But exactly how do you come up with such metrics and what criteria should be included as most important and which ones can safely be left out in order to ensure simplicity and comprehensibility?According to Rand Waddoups, Walmart???s senior director of sustainability, they started by taking steps to understand their supply chain, including the distribution of a 15-question survey to top-tier suppl
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