Various initiatives for curating and guiding quality in producing OER and for assigning use-related meta-tags exist, including an initiative in the United States to ensure alignment to the standards of the common core curriculum. As stated by Wiley, it is not necessarily the open licence that guarantees the resource will be fit for purpose, but how the original resources can further be adapted with the aim of improving learning (Wiley, 2013). The dynamic characteristics of OER lead to questions regarding how the process can be made transparent and how quality can be maintained over time. Therefore, openness should lead to continual improvement. As OER are continuously being improved, remixed, repurposed and eventually republished, there is no point in time when they reach their "peak of maturity” (Richter and Veith, 2014:206).