Changed "History" to "Background," started Ownership.md

docs/mediums/ownership.md

@@ -1,2 +1,37 @@
 # Ownership
 
+<!-- brief summary of the medium, no more than a handful of sentences
+
+(delete these comments as you fill in the sections) -->
+
+**Input:** <!-- what is required to use it? -->
+
+**Output:** <!-- what results does it produce? -->
+
+## Background
+
+<!-- brief historical reference points -->
+
+## Feedback loops
+
+### Sensitivities
+
+<!-- what does this medium capture especially well? -->
+
+### Oversights
+
+<!-- what does this medium overlook? -->
+
+## Implementations
+
+### Communities
+
+<!-- what are some real-world examples in practice? -->
+
+### Tools
+
+<!-- what software, methodologies, or organizations are available to facilitate implementation -->
+
+## Further resources
+
+<!-- where should people look first if they want to learn more? -->