NISO has released Outputs of the NISO Alternative Assessment Project.
Here's an excerpt from the announcement:
The National Information Standards Organization has published NISO RP-25-2016, Outputs of the NISO Alternative Assessment Project. This recommended practice on altmetrics, an expansion of the tools available for measuring the scholarly impact of research in the knowledge environment, was developed by working groups that were part of NISO's Altmetrics Initiative, a project funded by the Alfred P. Sloan Foundation. The document outlines altmetrics definitions and use cases, alternative outputs in scholarly communications, data metrics, and persistent identifiers in scholarly communications. This guidance was necessary because, before the project began, scholars had long expressed dissatisfaction with traditional measures of success, such as the Impact Factor, but needed standards relating to other viable assessment methods.