diff --git a/index.html b/index.html
index 655b3b7..3b0829f 100644
--- a/index.html
+++ b/index.html
@@ -422,6 +422,11 @@
"https://www.w3.org/TR/html51/browsers.html#parse-the-sandboxing-directive">
parse a sandboxing directive
+
+ parse a
+ URL
+
queue a
@@ -1180,15 +1185,22 @@
For each URL U in urls:
- - Resolve U relative to the API base URL specified
- by the current settings object, and add the resulting
- absolute URL (if any) to presentationUrls.
+
- let A be an absolute URL that is the result of
+ parsing U relative to the API base URL specified by
+ the current settings object.
- - If the resolve a URL algorithm failed, then throw a
- SyntaxError exception and abort all remaining steps.
+
- If the parse a URL algorithm failed, then
+ throw a SyntaxError exception and abort all
+ remaining steps.
+
+ - If A's scheme is supported by the controlling
+ user agent, add A to presentationUrls.
+ If presentationUrls is an empty list, then throw a
+ NotSupportedError and abort all remaining steps.
+
If any member of presentationUrls is not an a
priori authenticated URL, then throw a SecurityError and
abort these steps.