1 files changed, 20 insertions, 0 deletions
diff --git a/packages/gitbook-core/src/shapes/SummaryArticle.js b/packages/gitbook-core/src/shapes/SummaryArticle.js
new file mode 100644
index 0000000..d13bb31
--- /dev/null
+++ b/packages/gitbook-core/src/shapes/SummaryArticle.js
@@ -0,0 +1,20 @@
+/* eslint-disable no-use-before-define */
+
+const React  = require('react');
+const {
+    arrayOf,
+    string,
+    number,
+    shape
+} = React.PropTypes;
+
+const Article = shape({
+    title:    string.isRequired,
+    depth:    number.isRequired,
+    path:     string,
+    ref:      string,
+    level:    string,
+    articles: arrayOf(Article)
+});
+
+module.exports = Article;