diff --git a/core/modules/widgets/value.js b/core/modules/widgets/fill.js
similarity index 77%
rename from core/modules/widgets/value.js
rename to core/modules/widgets/fill.js
index 38fef1d29..c9a8a94de 100644
--- a/core/modules/widgets/value.js
+++ b/core/modules/widgets/fill.js
@@ -14,7 +14,7 @@ Sub-widget used by the transclude widget for specifying values for slots within
 
 var Widget = require("$:/core/modules/widgets/widget.js").widget;
 
-var ValueWidget = function(parseTreeNode,options) {
+var FillWidget = function(parseTreeNode,options) {
 	// Initialise
 	this.initialise(parseTreeNode,options);
 };
@@ -22,12 +22,12 @@ var ValueWidget = function(parseTreeNode,options) {
 /*
 Inherit from the base widget class
 */
-ValueWidget.prototype = Object.create(Widget.prototype);
+FillWidget.prototype = Object.create(Widget.prototype);
 
 /*
 Render this widget into the DOM
 */
-ValueWidget.prototype.render = function(parent,nextSibling) {
+FillWidget.prototype.render = function(parent,nextSibling) {
 	// Call the constructor
 	Widget.call(this);
 	this.parentDomNode = parent;
@@ -39,7 +39,7 @@ ValueWidget.prototype.render = function(parent,nextSibling) {
 /*
 Compute the internal state of the widget
 */
-ValueWidget.prototype.execute = function() {
+FillWidget.prototype.execute = function() {
 	// Construct the child widgets
 	this.makeChildWidgets();
 };
@@ -47,11 +47,11 @@ ValueWidget.prototype.execute = function() {
 /*
 Refresh the widget by ensuring our attributes are up to date
 */
-ValueWidget.prototype.refresh = function(changedTiddlers) {
+FillWidget.prototype.refresh = function(changedTiddlers) {
 	return this.refreshChildren(changedTiddlers);
 };
 
-exports.value = ValueWidget;
+exports.fill = FillWidget;
 
 })();
 	
\ No newline at end of file
diff --git a/core/modules/widgets/slot.js b/core/modules/widgets/slot.js
index 31df12a75..8ca6992d7 100644
--- a/core/modules/widgets/slot.js
+++ b/core/modules/widgets/slot.js
@@ -59,7 +59,7 @@ SlotWidget.prototype.execute = function() {
 	var parseTreeNodes = [{type: "text", attributes: {text: {type: "string", value: "Missing slot reference!"}}}];
 	if(pointer instanceof TranscludeWidget) {
 		// Get the parse tree nodes comprising the slot contents
-		parseTreeNodes = pointer.getTransclusionSlotValue(this.slotName,this.parseTreeNode.children);
+		parseTreeNodes = pointer.getTransclusionSlotFill(this.slotName,this.parseTreeNode.children);
 	}
 	// Construct the child widgets
 	this.makeChildWidgets(parseTreeNodes);
diff --git a/core/modules/widgets/transclude.js b/core/modules/widgets/transclude.js
index 7fcc39fac..38970efb9 100755
--- a/core/modules/widgets/transclude.js
+++ b/core/modules/widgets/transclude.js
@@ -40,7 +40,7 @@ TranscludeWidget.prototype.execute = function() {
 	// Get our attributes, string parameters, and slot values into properties of the widget object
 	this.collectAttributes();
 	this.collectStringParameters();
-	this.collectSlotValueParameters();
+	this.collectSlotFillParameters();
 	// Get the parse tree nodes that we are transcluding
 	var target = this.getTransclusionTarget(),
 		parseTreeNodes = target.parseTreeNodes;
@@ -129,30 +129,30 @@ TranscludeWidget.prototype.collectStringParameters = function() {
 /*
 Collect slot value parameters
 */
-TranscludeWidget.prototype.collectSlotValueParameters = function() {
+TranscludeWidget.prototype.collectSlotFillParameters = function() {
 	var self = this;
-	this.slotValueParseTrees = Object.create(null);
+	this.slotFillParseTrees = Object.create(null);
 	if(this.legacyMode) {
-		this.slotValueParseTrees["ts-missing"] = this.parseTreeNode.children;
+		this.slotFillParseTrees["ts-missing"] = this.parseTreeNode.children;
 	} else {
-		this.slotValueParseTrees["ts-raw"] = this.parseTreeNode.children;
-		var noValueWidgetsFound = true,
+		this.slotFillParseTrees["ts-raw"] = this.parseTreeNode.children;
+		var noFillWidgetsFound = true,
 			searchParseTreeNodes = function(nodes) {
 				$tw.utils.each(nodes,function(node) {
-					if(node.type === "value") {
+					if(node.type === "fill") {
 						if(node.attributes["$name"] && node.attributes["$name"].type === "string") {
 							var slotValueName = node.attributes["$name"].value;
-							self.slotValueParseTrees[slotValueName] = node.children;
+							self.slotFillParseTrees[slotValueName] = node.children;
 						}
-						noValueWidgetsFound = false;
+						noFillWidgetsFound = false;
 					} else {
 						searchParseTreeNodes(node.children);
 					}
 				});
 			};
 		searchParseTreeNodes(this.parseTreeNode.children);
-		if(noValueWidgetsFound) {
-			this.slotValueParseTrees["ts-missing"] = this.parseTreeNode.children;
+		if(noFillWidgetsFound) {
+			this.slotFillParseTrees["ts-missing"] = this.parseTreeNode.children;
 		}
 	}
 };
@@ -242,7 +242,7 @@ TranscludeWidget.prototype.getTransclusionTarget = function() {
 		// If there's no parse tree then return the missing slot value
 		return {
 			parser: null,
-			parseTreeNodes: (this.slotValueParseTrees["ts-missing"] || []),
+			parseTreeNodes: (this.slotFillParseTrees["ts-missing"] || []),
 			parseAsInline: parseAsInline,
 			text: null,
 			type: null
@@ -312,9 +312,9 @@ TranscludeWidget.prototype.getTransclusionMetaVariables = function() {
 /*
 Fetch the value of a slot
 */
-TranscludeWidget.prototype.getTransclusionSlotValue = function(name,defaultParseTreeNodes) {
-	if(name && this.slotValueParseTrees[name]) {
-		return this.slotValueParseTrees[name];
+TranscludeWidget.prototype.getTransclusionSlotFill = function(name,defaultParseTreeNodes) {
+	if(name && this.slotFillParseTrees[name]) {
+		return this.slotFillParseTrees[name];
 	} else {
 		return defaultParseTreeNodes || [];
 	}
diff --git a/core/modules/widgets/widget.js b/core/modules/widgets/widget.js
index cf32e71c4..bc6c4b3fe 100755
--- a/core/modules/widgets/widget.js
+++ b/core/modules/widgets/widget.js
@@ -443,7 +443,7 @@ Widget.prototype.makeChildWidget = function(parseTreeNode,options) {
 			type: "transclude",
 			children: [
 				{
-					type: "value",
+					type: "fill",
 					children: parseTreeNode.children
 				}
 			],
diff --git a/core/ui/Components/VisibleTransclude.tid b/core/ui/Components/VisibleTransclude.tid
index 8063b2a77..f654c0520 100644
--- a/core/ui/Components/VisibleTransclude.tid
+++ b/core/ui/Components/VisibleTransclude.tid
@@ -5,7 +5,7 @@ Import this component to make all the child transclusions visible.
 
 Block transclusions are shown in red, and inline transclusions are shown in green.
 -->
-\procedure <$transclude>(tiddler,$tiddler,mode,$mode)
+\widget $transclude(tiddler,$tiddler,mode,$mode)
 <!-- Replicate the logic of the transclude widget to determine the output mode, and hence the tag and colour to use for output -->
 <$let
 	mode={{{ [[$mode]is[variable]then<$mode>!is[blank]] :else[[mode]is[variable]then<mode>!is[blank]] :else[<parseAsInline>match[yes]then[inline]else[block]] }}}
@@ -35,7 +35,7 @@ Block transclusions are shown in red, and inline transclusions are shown in gree
 			""">
 				<!-- Non-legacy mode: we use dollar signs for the recursionMarker and mode -->
 				<$genesis $type="transclude" $remappable="no" $names="[<@params>jsonindexes[]]" $values="[<@params>jsonindexes[]] :map[<@params>jsonget<currentTiddler>]" $$recursionMarker="no" $$mode=<<mode>>>
-					<!-- Reach back up to the grandparent transclusion to get the correct slot value -->
+					<!-- Reach back up to the grandparent transclusion to get the correct slot fill value -->
 					<$slot $name="ts-raw" $depth="2"/>
 				</$genesis>
 			</$list>
diff --git a/editions/test/tiddlers/tests/data/transclude/MissingTarget.tid b/editions/test/tiddlers/tests/data/transclude/MissingTarget.tid
index 5fa2d12c7..8bdc86eaa 100644
--- a/editions/test/tiddlers/tests/data/transclude/MissingTarget.tid
+++ b/editions/test/tiddlers/tests/data/transclude/MissingTarget.tid
@@ -13,12 +13,12 @@ title: Output
 	</$parameters>
 </$transclude>
 <$transclude $tiddler='TiddlerOne' one='Ferret'>
-	<$value $name="ts-missing">
+	<$fill $name="ts-missing">
 		<$parameters one='Ferret'>
 			Badger
 			<$text text=<<one>>/>
 		</$parameters>
-	</$value>
+	</$fill>
 </$transclude>
 <$transclude $tiddler='MissingTiddler' one='Ferret'>
 	<$parameters one='Ferret'>
@@ -27,12 +27,12 @@ title: Output
 	</$parameters>
 </$transclude>
 <$transclude $tiddler='MissingTiddler' one='Ferret'>
-	<$value $name="ts-missing">
+	<$fill $name="ts-missing">
 		<$parameters one='Ferret'>
 			Badger
 			<$text text=<<one>>/>
 		</$parameters>
-	</$value>
+	</$fill>
 </$transclude>
 +
 title: TiddlerOne
diff --git a/editions/test/tiddlers/tests/data/transclude/Parameterised-Slotted.tid b/editions/test/tiddlers/tests/data/transclude/Parameterised-Slotted.tid
index eeff9b33e..c795621ef 100644
--- a/editions/test/tiddlers/tests/data/transclude/Parameterised-Slotted.tid
+++ b/editions/test/tiddlers/tests/data/transclude/Parameterised-Slotted.tid
@@ -7,9 +7,9 @@ title: Output
 
 \whitespace trim
 <$transclude $tiddler='TiddlerOne' one='Ferret'>
-	<$value $name="content">
+	<$fill $name="content">
 		Hippopotamus
-	</$value>
+	</$fill>
 </$transclude>
 +
 title: TiddlerOne