diff --git a/Server-Client-level-API.md b/Server-Client-level-API.md
index 2c9ddf2..38788c6 100644
--- a/Server-Client-level-API.md
+++ b/Server-Client-level-API.md
@@ -110,6 +110,14 @@ trait SbtClient extends Closeable {
 }
 ```
 
+# Various Data Classes
+
+```scala
+package sbt.api
+case class ProjectReference(build: URI, name: String)
+case class MinimalBuildStructure(builds: Seq[URI], projects: Seq[ProjectReference])
+```
+
 # Various helper classes
 
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