158. We will strengthen data and statistical capacities at national, subnational and local levels to effectively monitor progress achieved in the implementation of sustainable urban development policies and strategies, and to inform decision-making and appropriate reviews. Data collection procedures for the implementation of follow-up to and review of the New Urban Agenda should primarily be based on official national, subnational and local data sources and other sources as appropriate, and be open, transparent and consistent with the purpose of respecting privacy rights and all human rights obligations and commitments. Progress towards a global people-based definition of cities and human settlements may support this work.
Media or #OpenData
With a hashtag per article, anyone can tag content relevant to the status and implementation of the article, and share it via social media as explained at #tags in support of easy information retrieval (video on YouTube).
If you publish a website or blog, you can also embed the Twitter timeline of a hashtag as explained at How to embed a #tag timeline in your website or blog? (Video on YouTube). There is a Twitter timeline embedded at #udhr19 - Freedom of opinion & expression; to seek & receive information.