diff --git a/docs/_config.yml b/docs/_config.yml
deleted file mode 100644
index 62c7c0e..0000000
--- a/docs/_config.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-# Jupyter Book settings
-# Learn more at https://jupyterbook.org/customize/config.html
-
-title: ''
-author: Executable Book Project
-logo: images/logo-wide.svg
-
-# Force re-execution of notebooks on each build.
-# See https://jupyterbook.org/content/execute.html
-execute:
-  execute_notebooks: force
-
-# Define the name of the latex output file for PDF builds
-latex:
-  latex_documents:
-    targetname: book.tex
-
-# Information about where the book exists on the web
-repository:
-  url: https://github.com/executablebooks/myst-spec # Online location of your book
-
-# See https://jupyterbook.org/customize/config.html#add-a-link-to-your-repository
-html:
-  # favicon: images/favicon.ico
-  # google_analytics_id: G-XXX or UA-XXX
-  use_issues_button: true
-  use_repository_button: true
-  use_edit_page_button: true
-  extra_navbar: Maintained by <a href="https://executablebooks.org">Executable Books</a>
diff --git a/docs/_toc.yml b/docs/_toc.yml
deleted file mode 100644
index 68370e4..0000000
--- a/docs/_toc.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-# Table of contents
-# Learn more at https://jupyterbook.org/customize/toc.html
-
-format: jb-book
-root: index
-chapters:
-  - file: features/overview
-  - file: features/commonmark
-  - file: features/admonitions
-  - file: features/figures
-  - file: features/tables
-  - file: features/math
-  - file: features/references
-  - file: features/footnotes
-  - file: features/blocks
-  - file: myst.schema
diff --git a/docs/examples/outputs.yml b/docs/examples/outputs.yml
new file mode 100644
index 0000000..e3a3435
--- /dev/null
+++ b/docs/examples/outputs.yml
@@ -0,0 +1,45 @@
+cases:
+  - title: output with children
+    mdast:
+      type: root
+      children:
+        - type: output
+          meta:
+            'text/plain': Hello world!
+          children:
+            - type: paragraph
+              children:
+                - type: text
+                  value: Hello world!
+  - title: output without children
+    mdast:
+      type: root
+      children:
+        - type: output
+          meta:
+            'application/json': '{"foo": 12}'
+          children: []
+  - title: outputs with children
+    mdast:
+      type: root
+      children:
+        - type: outputs
+          children:
+            - type: output
+              meta:
+                'text/plain': Hello world!
+              children:
+                - type: paragraph
+                  children:
+                    - type: text
+                      value: Hello world!
+  - title: outputs without children
+    mdast:
+      type: root
+      children:
+        - type: outputs
+          children:
+            - type: output
+              meta:
+                'application/json': '{"foo": 12}'
+              children: []
diff --git a/docs/features/outputs.md b/docs/features/outputs.md
new file mode 100644
index 0000000..066cf92
--- /dev/null
+++ b/docs/features/outputs.md
@@ -0,0 +1,32 @@
+
+# Execution Outputs
+
+## Outputs
+
+`Outputs` provide a structural container for the outputs produced by a Jupyter kernel.
+
+
+### Specification
+
+```{include} ../nodes/outputs.md
+```
+
+### Example
+
+```{include} ../examples/outputs.md
+```
+
+## Output
+
+Individual outputs from a Jupyer kernel may be embedded in an `output` node.
+
+
+### Specification
+
+```{include} ../nodes/output.md
+```
+
+### Example
+
+```{include} ../examples/output.md
+```
diff --git a/docs/myst.yml b/docs/myst.yml
index b4f3c8f..384411e 100644
--- a/docs/myst.yml
+++ b/docs/myst.yml
@@ -8,6 +8,22 @@ project:
   subject: Specification
   venue:
     title: MyST Spec
+
+  toc:
+    # Auto-generated by `myst init --write-toc`
+    - file: index.md
+    - file: features/overview.md
+    - file: features/commonmark.md
+    - file: features/admonitions.md
+    - file: features/figures.md
+    - file: features/tables.md
+    - file: features/math.md
+    - file: features/references.md
+    - file: features/footnotes.md
+    - file: features/blocks.md
+    - file: features/outputs.md
+    - file: myst.schema.md
+    
 site:
   title: MyST Spec
   actions:
diff --git a/index.ts b/index.ts
index a87feac..2335a2d 100644
--- a/index.ts
+++ b/index.ts
@@ -315,6 +315,7 @@ const subschemas = [
   'comments',
   'commonmark',
   'unist',
+  'outputs',
 ];
 // Combine all schema files into the single myst schema document
 subschemas.forEach(
diff --git a/schema/outputs.schema.json b/schema/outputs.schema.json
new file mode 100644
index 0000000..94ed251
--- /dev/null
+++ b/schema/outputs.schema.json
@@ -0,0 +1,59 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "https://spec.myst.tools/json-schema/outputs.schema.json",
+  "description": "execution output container types",
+  "$defs": {
+    "Output": {
+      "type": "object",
+      "description": "Container for execution output from a Jupyer Kernel",
+      "allOf": [
+        {
+          "properties": {
+            "type": {
+              "const": "output"
+            },
+            "meta": {
+              "description": "Raw IOutput data",
+              "$ref": "https://raw.githubusercontent.com/jupyter/nbformat/refs/heads/main/nbformat/v4/nbformat.v4.5.schema.json#/definitions/output"
+            },
+            "children": {
+              "description": "Children from parsing the raw IOutput data",
+              "type": "array",
+              "items": {
+                "$ref": "unist.schema.json#/$defs/Node"
+              }
+            },
+            "position": {},
+            "data": {}
+          },
+          "additionalProperties": false
+        },
+        { "$ref": "unist.schema.json#/$defs/Parent" }
+      ]
+    },
+    "Outputs": {
+      "type": "object",
+      "description": "Container for a collection of execution outputs from a Jupyer Kernel",
+      "allOf": [
+        {
+          "properties": {
+            "type": {
+              "const": "outputs"
+            },
+            "children": {
+              "description": "Individual output nodes",
+              "type": "array",
+              "items": {
+                "$ref": "#/$defs/Output"
+              }
+            },
+            "position": {},
+            "data": {}
+          },
+          "additionalProperties": false
+        },
+        { "$ref": "unist.schema.json#/$defs/Parent" }
+      ]
+    }
+  }
+}
diff --git a/schema/schema.spec.ts b/schema/schema.spec.ts
index 5f534a0..a087824 100644
--- a/schema/schema.spec.ts
+++ b/schema/schema.spec.ts
@@ -79,7 +79,7 @@ const cases: [string, TestCase][] = files
   .filter(([f, t]) => {
     if (t.skip) skipped.push([f, t]);
     if (t.invalid) invalid.push([f, t]);
-    return !t.skip && !t.invalid;
+    return !t.skip && !t.invalid && t.myst !== undefined;
   });
 
 describe('Valid Schema Tests', () => {