diff --git a/index.bs b/index.bs
index 6a52cc4e..d5d5a302 100644
--- a/index.bs
+++ b/index.bs
@@ -25,18 +25,16 @@ Abstract: and that newly published specifications reference this
 Abstract: document to ensure conforming implementations of interfaces
 Abstract: are interoperable.
 Boilerplate: omit issues-index, omit conformance, omit feedback-header
+Default Biblio Status: current
 </pre>
 
 <pre class="link-defaults">
 spec: infra; type: dfn; text: list
+spec: url; type: interface; text: URL
+spec: dom; type: interface; text: Document
 </pre>
 
 <pre class="anchors">
-urlPrefix: https://html.spec.whatwg.org/; spec: HTML
-    type: interface
-        text: Audio; url: dom-audio
-        text: Option; url: dom-option
-        text: Image; url: dom-image
 urlPrefix: http://www.unicode.org/glossary/; spec: UNICODE
     type: dfn
         text: Unicode scalar value; url: unicode_scalar_value
@@ -157,6 +155,14 @@ urlPrefix: https://tc39.github.io/ecma262/; spec: ECMA-262
         text: JSON.stringify; url: sec-json.stringify
 </pre>
 
+<pre class=biblio>
+{
+    "GEOMETRY": {
+        "aliasOf": "GEOMETRY-1"
+    }
+}
+</pre>
+
 <style>
         pre.set {
           font-size: 80%;
@@ -3394,8 +3400,8 @@ is.
     [=support indexed properties=],
     or (b) with a forEach method that instead invokes its callback like
     Set.protoype.forEach (where the key is the same as the value).
-    If you’re creating an API that needs such a forEach method, please send a request to
-    <a href="mailto:public-script-coord@w3.org">public-script-coord@w3.org</a>.
+    If you’re creating an API that needs such a forEach method, please
+    <a href="https://github.com/heycam/webidl/issues/new?title=Enhancement%20request%20for%20Iterables">file an issue</a>.
 
 </div>
 
@@ -8448,6 +8454,28 @@ corresponding to [=interface members=].
 
 <h4 id="LegacyArrayClass" extended-attribute lt="LegacyArrayClass">[LegacyArrayClass]</h4>
 
+<div class="advisement">
+
+    The [{{LegacyArrayClass}}] [=extended attribute=] is an undesirable feature.
+    It exists only so that legacy Web platform features can be specified.
+    It should not be used in specifications
+    unless required to specify the behavior of legacy APIs,
+    or for consistency with these APIs.
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[LegacyArrayClass]">filing an issue</a>
+    before proceeding.
+
+    <small class="non-normative">
+        The [{{LegacyArrayClass}}] [=extended attribute=] appears on
+        the following [=interfaces=]:
+        {{DOMRectList}},
+        {{MediaList}},
+        {{StyleSheetList}}, and
+        {{CSSRuleList}}. [[GEOMETRY]] [[CSSOM]]
+    </small>
+
+</div>
+
 If the [{{LegacyArrayClass}}]
 [=extended attribute=]
 appears on an [=interface=]
@@ -8522,6 +8550,32 @@ entails.
 
 <h4 id="LegacyUnenumerableNamedProperties" extended-attribute lt="LegacyUnenumerableNamedProperties">[LegacyUnenumerableNamedProperties]</h4>
 
+<div class="advisement">
+
+    The [{{LegacyUnenumerableNamedProperties}}] [=extended attribute=] is an undesirable feature.
+    It exists only so that legacy Web platform features can be specified.
+    It should not be used in specifications
+    unless required to specify the behavior of legacy APIs,
+    or for consistency with these APIs.
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[LegacyUnenumerableNamedProperties]">filing an issue</a>
+    before proceeding.
+
+    <small class="non-normative">
+        The [{{LegacyUnenumerableNamedProperties}}] [=extended attribute=] appears on
+        the following [=interfaces=]:
+        {{HTMLCollection}},
+        {{NamedNodeMap}},
+        {{HTMLAllCollection}},
+        {{HTMLFormElement}},
+        {{PluginArray}},
+        {{MimeTypeArray}},
+        {{Plugin}}, and
+        {{Window}}. [[DOM]] [[HTML]]
+    </small>
+
+</div>
+
 If the [{{LegacyUnenumerableNamedProperties}}]
 [=extended attribute=]
 appears on a [=interface=]
@@ -8546,6 +8600,27 @@ entails.
 
 <h4 id="LegacyWindowAlias" extended-attribute lt="LegacyWindowAlias">[LegacyWindowAlias]</h4>
 
+<div class="advisement">
+
+    The [{{LegacyWindowAlias}}] [=extended attribute=] is an undesirable feature.
+    It exists only so that legacy Web platform features can be specified.
+    It should not be used in specifications
+    unless required to specify the behavior of legacy APIs,
+    or for consistency with these APIs.
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[LegacyWindowAlias]">filing an issue</a>
+    before proceeding.
+
+    <small class="non-normative">
+        The [{{LegacyWindowAlias}}] [=extended attribute=] appears on the following [=interfaces=]:
+        {{DOMPoint}},
+        {{DOMRect}},
+        {{DOMMatrix}}, and
+        {{URL}}. [[GEOMETRY]] [[URL]]
+    </small>
+
+</div>
+
 If the [{{LegacyWindowAlias}}] [=extended attribute=] appears on an [=interface=],
 it indicates that the [=primary global interface=] will have a property
 for each [=identifier=] mentioned in the extended attribute,
@@ -8580,13 +8655,6 @@ An interface must not have more than one [{{LegacyWindowAlias}}] extended attrib
 See [[#es-interfaces]] for details on how legacy window aliases
 are to be implemented.
 
-<p class="advisement">
-    [{{LegacyWindowAlias}}] extended attributes are an undesirable feature.
-    They exist only so that legacy Web platform features can be specified.
-    They should not be used in specifications
-    unless required to specify the behavior of legacy APIs.
-</p>
-
 <div class="example">
 
     The following IDL defines an interface that uses the
@@ -8621,14 +8689,6 @@ are to be implemented.
 
 <h4 id="LenientSetter" extended-attribute lt="LenientSetter">[LenientSetter]</h4>
 
-If the [{{LenientSetter}}]
-[=extended attribute=]
-appears on a [=read only=]
-[=regular attribute=],
-it indicates that a no-op setter will be generated for the attribute’s
-accessor property.  This results in erroneous assignments to the property
-in strict mode to be ignored rather than causing an exception to be thrown.
-
 <div class="advisement">
 
     Specifications should not use [{{LenientSetter}}]
@@ -8638,14 +8698,28 @@ in strict mode to be ignored rather than causing an exception to be thrown.
     exists.  In strict mode, this would cause an exception to be thrown,
     potentially breaking page.  Without [{{LenientSetter}}],
     this could prevent a browser from shipping the feature.
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[LenientSetter]">filing an issue</a>
+    before proceeding.
 
-    Specification authors who
-    wish to use this feature are strongly advised to discuss this on the
-    <a href="mailto:public-script-coord@w3.org">public-script-coord@w3.org</a>
-    mailing list before proceeding.
+    <small class="non-normative">
+        The [{{LenientSetter}}] [=extended attribute=] appears on
+        the {{Document/fullscreenEnabled}} and {{Document/fullscreenEnabled}} [=attributes=]
+        of the {{Document}} interface, and on
+        the {{DocumentOrShadowRoot/fullscreenElement}} [=attribute=]
+        of the {{DocumentOrShadowRoot}} mixin. [[FULLSCREEN]]
+    </small>
 
 </div>
 
+If the [{{LenientSetter}}]
+[=extended attribute=]
+appears on a [=read only=]
+[=regular attribute=],
+it indicates that a no-op setter will be generated for the attribute’s
+accessor property.  This results in erroneous assignments to the property
+in strict mode to be ignored rather than causing an exception to be thrown.
+
 The [{{LenientThis}}] extended attribute
 must [=takes no arguments|take no arguments=].
 It must not be used on anything other than
@@ -8695,6 +8769,24 @@ See the <a href="#es-attributes">Attributes</a> section for how
 
 <h4 id="LenientThis" extended-attribute lt="LenientThis">[LenientThis]</h4>
 
+<div class="advisement">
+
+    Specifications should not use [{{LenientThis}}]
+    unless required for compatibility reasons. 
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[LenientThis]">filing an issue</a>
+    before proceeding.
+
+    <small class="non-normative">
+        The [{{LenientThis}}] [=extended attribute=] appears on
+        the {{Document/onreadystatechange}},
+        {{Document/onmouseenter}}, and
+        {{Document/onmouseleave}} [=attributes=]
+        of the {{Document}} interface. [[HTML]]
+    </small>
+
+</div>
+
 If the [{{LenientThis}}]
 [=extended attribute=]
 appears on a [=regular attribute=],
@@ -8712,14 +8804,6 @@ It must not be used on a
 The [{{LenientThis}}] extended attribute must not be used on an attribute declared on a
 [=namespace=].
 
-<p class="advisement">
-    Specifications should not use [{{LenientThis}}]
-    unless required for compatibility reasons.  Specification authors who
-    wish to use this feature are strongly advised to discuss this on the
-    <a href="mailto:public-script-coord@w3.org">public-script-coord@w3.org</a>
-    mailing list before proceeding.
-</p>
-
 See the <a href="#es-attributes">Attributes</a> section for how
 [{{LenientThis}}]
 is to be implemented.
@@ -8763,6 +8847,26 @@ is to be implemented.
 
 <h4 id="NamedConstructor" extended-attribute lt="NamedConstructor">[NamedConstructor]</h4>
 
+<div class="advisement">
+
+    [{{NamedConstructor}}] [=extended attribute=] is an undesirable feature.
+    It exists only so that legacy Web platform features can be specified.
+    It should not be used in specifications
+    unless required to specify the behavior of legacy APIs,
+    or for consistency with these APIs.
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[NamedConstructor]">filing an issue</a>
+    before proceeding.
+
+    <small class="non-normative">
+        The [{{NamedConstructor}}] [=extended attribute=] appears on the following [=interfaces=]:
+        {{HTMLAudioElement}},
+        {{HTMLOptionElement}}, and
+        {{HTMLImageElement}}. [[HTML]]
+    </small>
+
+</div>
+
 If the [{{NamedConstructor}}]
 [=extended attribute=]
 appears on an [=interface=],
@@ -8801,15 +8905,6 @@ must not be used on a [=callback interface=].
 See [[#named-constructors]] for details on how named constructors
 are to be implemented.
 
-<p class="advisement">
-    [{{NamedConstructor}}] extended attributes are an undesirable feature.
-    They exist only so that legacy Web platform features can be specified.
-    They should not be used in specifications
-    unless required to specify the behavior of legacy APIs.
-    Known APIs requiring the use of [{{NamedConstructor}}] extended attributes are:
-    {{Audio}}, {{Option}} and {{Image}}.
-</p>
-
 <div class="example">
 
     The following IDL defines an interface that uses the
@@ -8885,21 +8980,18 @@ a [=promise type=].
 
 <h4 id="NoInterfaceObject" extended-attribute lt="NoInterfaceObject">[NoInterfaceObject]</h4>
 
-If the [{{NoInterfaceObject}}]
-[=extended attribute=]
-appears on an [=interface=],
-it indicates that an
-[=interface object=]
+If the [{{NoInterfaceObject}}] [=extended attribute=] appears on an [=interface=],
+it indicates that an [=interface object=]
 will not exist for the interface in the ECMAScript binding.
 
 <p class="advisement">
-    The [{{NoInterfaceObject}}] extended attribute
-    should not be used on interfaces that are not
-    solely used as [=supplemental interfaces|supplemental=] interfaces,
-    unless there are clear Web compatibility reasons for doing so.  Specification authors who
-    wish to use this feature are strongly advised to discuss this on the
-    <a href="mailto:public-script-coord@w3.org">public-script-coord@w3.org</a>
-    mailing list before proceeding.
+    The [{{NoInterfaceObject}}] [=extended attribute=]
+    should not be used on [=interfaces=] that are not
+    solely used as [=supplemental interfaces=],
+    unless there are clear Web compatibility reasons for doing so. 
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[NoInterfaceObject]%20on%20a%20non-supplemental%20interface">filing an issue</a>
+    before proceeding.
 </p>
 
 The [{{NoInterfaceObject}}] extended attribute
@@ -8965,6 +9057,26 @@ for the specific requirements that the use of
 
 <h4 id="OverrideBuiltins" extended-attribute lt="OverrideBuiltins">[OverrideBuiltins]</h4>
 
+<div class="advisement">
+
+    The [{{OverrideBuiltins}}] [=extended attribute=] is an undesirable feature.
+    It exists only so that legacy Web platform features can be specified.
+    It should not be used in specifications
+    unless required to specify the behavior of legacy APIs,
+    or for consistency with these APIs.
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[OverrideBuiltins]">filing an issue</a>
+    before proceeding.
+
+    <small class="non-normative">
+        The [{{OverrideBuiltins}}] [=extended attribute=] appears on the
+        {{DOMStringMap}},
+        {{Document}}, and
+        {{HTMLFormElement}} [=interfaces=]. [[HTML]]
+    </small>
+
+</div>
+
 If the [{{OverrideBuiltins}}]
 [=extended attribute=]
 appears on an [=interface=],
@@ -9387,6 +9499,28 @@ that does specify [{{SecureContext}}].
 
 <h4 id="TreatNonObjectAsNull" extended-attribute lt="TreatNonObjectAsNull">[TreatNonObjectAsNull]</h4>
 
+<div class="advisement">
+    
+    The [{{TreatNonObjectAsNull}}] [=extended attribute=] is an undesirable feature.
+    It exists only so that legacy Web platform features can be specified.
+    It should not be used in specifications
+    unless required to specify the behavior of legacy APIs,
+    or for consistency with these APIs.
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[TreatNonObjectAsNull]">filing an issue</a>
+    before proceeding.
+
+    <small class="non-normative">
+        The [{{TreatNonObjectAsNull}}] [=extended attribute=] appears on
+        the [=callback functions=] {{EventHandlerNonNull}},
+        {{OnBeforeUnloadEventHandlerNonNull}}, and
+        {{OnErrorEventHandlerNonNull}}
+        used as the type of [=event handler IDL attributes=]
+        such as <code>onclick</code> and <code>onerror</code>. [[HTML]]
+    </small>
+
+</div>
+
 If the [{{TreatNonObjectAsNull}}]
 [=extended attribute=]
 appears on a [=callback function=],
@@ -9396,19 +9530,6 @@ whose type is a [=nullable type|nullable=]
 that is not an object will be converted to
 the <emu-val>null</emu-val> value.
 
-<p class="advisement">
-    Specifications should not use [{{TreatNonObjectAsNull}}]
-    unless required to specify the behavior of legacy APIs or for consistency with these
-    APIs.  Specification authors who
-    wish to use this feature are strongly advised to discuss this on the
-    <a href="mailto:public-script-coord@w3.org">public-script-coord@w3.org</a>
-    mailing list before proceeding.  At the time of writing, the only known
-    valid use of [{{TreatNonObjectAsNull}}]
-    is for the [=callback functions=] used as the type
-    of [=event handler IDL attributes=]
-    such as <code>onclick</code> and <code>onerror</code>.
-</p>
-
 See [[#es-nullable-type]]
 for the specific requirements that the use of
 [{{TreatNonObjectAsNull}}] entails.
@@ -9459,6 +9580,17 @@ for the specific requirements that the use of
 
 <h4 id="TreatNullAs" extended-attribute lt="TreatNullAs">[TreatNullAs]</h4>
 
+<p class="advisement">
+    The [{{TreatNullAs}}] [=extended attribute=] is an undesirable feature.
+    It exists only so that legacy Web platform features can be specified.
+    It should not be used in specifications
+    unless required to specify the behavior of legacy APIs,
+    or for consistency with these APIs.
+    Editors who wish to use this feature are strongly advised to discuss this
+    by <a href="https://github.com/heycam/webidl/issues/new?title=Intent%20to%20use%20[TreatNullAs]">filing an issue</a>
+    before proceeding.
+</div>
+
 If the [{{TreatNullAs}}] [=extended attribute=] appears on the {{DOMString}} type, it creates a new
 IDL type such that that when an ECMAScript <emu-val>null</emu-val> is converted to the IDL type, it
 will be handled differently from its default handling. Instead of being stringified to