Book pages

specification/src/tutorial/schema.md

@@ -20,7 +20,7 @@ We define two scalar types: `String` and `Int`.
 
 ## Object Types
 
-For each collection, we define an object type for its rows:
+For each collection, we define an object type for its rows. In addition, we define object types for any nested types which we use:
 
 ```rust,no_run,noplayground
 {{#include ../../../ndc-reference/bin/reference/main.rs:schema_object_types}}
@@ -38,6 +38,12 @@ For each collection, we define an object type for its rows:
 {{#include ../../../ndc-reference/bin/reference/main.rs:schema_object_type_article}}
 ```
 
+### Institution
+
+```rust,no_run,noplayground
+{{#include ../../../ndc-reference/bin/reference/main.rs:schema_object_type_institution}}
+```
+
 ## Collections
 
 We define each collection's schema using the type information defined above:
@@ -66,6 +72,12 @@ We define one additional collection, `articles_by_author`, which is provided as
 {{#include ../../../ndc-reference/bin/reference/main.rs:schema_collection_articles_by_author}}
 ```
 
+### Institution
+
+```rust,no_run,noplayground
+{{#include ../../../ndc-reference/bin/reference/main.rs:schema_collection_institution}}
+```
+
 ## Functions
 
 The schema defines a list of [functions](../specification/schema/functions.md), each including its input and output [types](../specification/types.md).