diff --git a/index.html b/index.html
index 60cd381..b462280 100644
--- a/index.html
+++ b/index.html
@@ -976,8 +976,8 @@
The InteractionOutput interface
If |this|.|data| is not a {{ReadableStream}} or if
- |dataUsed| is `true`, or if |form| is not an {{object}} or if |schema| or its
- |type| are `null` or `undefined`, then
+ |dataUsed| is `true`, or if |form| is not an {{object}} or if |schema|
+ is `null` or `undefined`, then
[=reject=] |promise| with {{NotReadableError}} and stop.
@@ -1057,6 +1057,30 @@ The InteractionOutput interface
The check data schema algorithm
To run the check data schema steps on |payload| and |schema:object|,
+ -
+ If |schema| is `null` or `undefined`, return `undefined`.
+
+ -
+ If |schema|.|const| is not |undefined| and |schema|.|const| does not equal |payload|, throw {{TypeError}} and stop.
+
+ -
+ If |schema|.|enum| is not |undefined| and none of the elements in
+ |schema|.|enum| equal |payload|, throw {{TypeError}} and stop.
+
+ -
+ Let |oneOf| be |schema|.|oneOf|.
+ If |oneOf| is not |undefined|,
+
+ -
+ For each |subSchema| in |oneOf|, run the check data schema
+ steps on |payload| and |subSchema|.
+
+ -
+ If none or more than one of these runs do not throw, throw
+ {{TypeError}} and stop.
+
+
+
-
Let |type| be |schema|.|type|.