Vicente Solis Each of the solutions listed there come with a suggested data structure either in a geodatabase or AGOL layers (as appropriate) complete with sample data.
For example, here's what's included with the Crash Analysis solution: Crash Analysis | ArcGIS for State Government
If that's not what you are looking for, perhaps provide a bit more information on the conference and session you attended or the goal of the schema you are interested in. There are quite a few geodatabase schemas suggested by Esri for a variety of purposes.