
The OCI folder contains multiple Visio stencils (*.vssx) and there is a Visio template (OCI-Diagrams.vstx) next to this readme.txt file.

The stencils hold the icons, connectors, and containers needed to create a diagram in the same style used by the Oracle Cloud Infrastructure Architecture Center (https://www.oracle.com/cloud/architecture-center/) and described in the PowerPoint file "Style guide for topologies & diagrams" available at https://docs.oracle.com/en-us/iaas/Content/General/Reference/graphicsfordiagrams.htm. The template has the Oracle Redwood custom color theme, a page size appropriate for these diagrams, and a number of quotes from the PowerPoint style guide.

In Windows, copy the stencils to the folder C:\Users\<username>\Documents\My Shapes\OCI and put the template in C:\Users\<username>\Documents\My Shapes\ 

Next, in Visio go to File -> Options -> Advanced -> File Locations and
set the Templates path to the My Shapes folder (C:\Users\<username>\Documents\My Shapes\).
Restart Visio and now you should see an option to start an OCI Diagram when creating a new Visio file.

If you're using a MAC, get a copy of the draw.io assets and use that instead!