The document discusses the evolution of open spatial data infrastructures (SDIs) over time from 2000 to 2013. It shows how SDIs have developed from standards, software, and data to include metadata, view services, data services, and knowledge. It also notes that server software now embeds knowledge to make SDIs easier to use and that future SDIs may focus more on location-based services, privacy, and apps. The document concludes by stating GeoCat's focus is on knowledge development in collaboration with clients.