diff --git a/pwiki/page.js b/pwiki/page.js
index dc8e6e3..e06b6e1 100755
--- a/pwiki/page.js
+++ b/pwiki/page.js
@@ -517,6 +517,8 @@ object.Constructor('Page', BasePage, {
 
 	RECURSION_ERROR: 'RecursionError',
 
+	NOT_FOUND_TEMPLATE_ERROR: 'NotFoundTemplateError',
+
 	// The page that started the current render...
 	//
 	// This is set by .text and maintained by .clone(..).
@@ -828,6 +830,9 @@ object.Constructor('Page', BasePage, {
 		//	Force hide a slot...
 		//	<slot hidden ... />
 		//
+		//	Insert previous slot content...
+		//	<content/>
+		//
 		//
 		// NOTE: by default only the first slot with <name> is visible, 
 		// 		all other slots with <name> will replace its content, unless
@@ -836,8 +841,6 @@ object.Constructor('Page', BasePage, {
 		//
 		// XXX revise the use of hidden/shown use mechanic and if it's 
 		// 		needed...
-		// XXX how do we handle a slot defined within a slot????
-		// 		...seems that we'll fall into recursion on definition...
 		slot: Macro(
 			['name', 'text', ['shown', 'hidden']],
 			async function(args, body, state){
@@ -869,17 +872,31 @@ object.Constructor('Page', BasePage, {
 							: name in slots)
 
 				// NOTE: we prioritize the nested slots over the current...
+				var parent_slot = slots[name]
 				delete slots[name]
 				var slot = await this.__parser__.expand(this, text, state)
-				slots[name] = 
+				parent_slot = slot[name] == null ?
+					parent_slot
+					: slot
+				slot = slots[name] = 
 					slots[name] 
 						?? slot
 
+				// handle slot-content...
+				for(var i in slot){
+					if(typeof(slot[i]) != 'string'
+							&& slot[i].name == 'content'){
+						break }
+					i = null }
+				i != null 
+					&& parent_slot
+					&& (slot[i] = parent_slot)
+
 				return hidden ?
 					''
 					: function(state){
 						return state.slots[name] } }), 
-		'slot-content': ['slot'],
+		'content': ['slot'],
 
 		// 	
 		// 	<macro src=<url>> .. </macro>
@@ -1091,10 +1108,10 @@ object.Constructor('Page', BasePage, {
 		path = pwpath.join(path)
 
 		// get the template relative to the top most pattern...
-		// XXX BUG: this sometimes returns undefined on load...
 		tpl = await this.get(tpl).find(true)
 		if(!tpl){
-			throw new Error('UNKNOWN RENDER TEMPLATE: '+ tpl_name) }
+			console.warn('UNKNOWN RENDER TEMPLATE: '+ tpl_name) 
+			return this.get(this.NOT_FOUND_TEMPLATE_ERROR).parse() }
 
 		// render template in context of page...
 		var data = { render_root: this }
@@ -1355,6 +1372,8 @@ module.System = {
 		text: 'RECURSION ERROR: @quote(../path)' },
 	NotFoundError: { 
 		text: 'NOT FOUND ERROR: @quote(./path)' },
+	NotFoundTemplateError: {
+		text: 'NOT FOUND TEMPLATE ERROR: @quote(../path)' },
 
 	DeletingPage: {
 		text: 'Deleting: @source(../path)' },
@@ -1381,23 +1400,21 @@ module.System = {
 		return this.get('..').path },
 	location: function(){
 		return this.get('..').path },
+	// XXX this can be a list for pattern paths...
+	resolved: function(){
+		return this.get('..').resolve() },
 	dir: function(){
 		return this.get('..').dir },
 	name: function(){
 		return this.get('..').name },
-	ctime: function(){
-		return this.get('..').data.ctime ?? '' },
-	mtime: function(){
-		return this.get('..').data.mtime ?? '' },
-
-	// XXX this can be a list for pattern paths...
-	resolved: function(){
-		return this.get('..').resolve() },
-
 	title: function(){
 		var p = this.get('..')
 		return p.title 
 			?? p.name },
+	ctime: function(){
+		return this.get('..').data.ctime ?? '' },
+	mtime: function(){
+		return this.get('..').data.mtime ?? '' },
 
 
 	// utils...
@@ -1437,6 +1454,42 @@ module.System = {
 	// XXX broken...
 	test_list: function(){
 		return 'abcdef'.split('') },
+	test_slots: {
+		/* XXX
+		text: object.doc`
+			Sequential:
+			<slot name="sequential">unfilled</slot>
+			<slot name="sequential">filled</slot>
+			<slot name="sequential">refilled</slot> 
+			<br><br>
+			Nested:
+			<slot name="nested">
+				unfilled
+				<slot name="nested">
+					filled
+					<slot name="nested">
+						refilled
+					</slot>
+				</slot>
+			</slot> 
+			<br><br>
+			Content: A B C:
+			<slot name="slot-content">A</slot>
+			<slot name="slot-content"><content/> B</slot>
+			<slot name="slot-conten"><content/> C</slot>
+			<br><br>
+		//*/
+		text: object.doc`
+			Nested content: A B C:
+			<slot name="nested-slot-content">
+				A
+				<slot name="nested-slot-content">
+					<content/> B
+					<slot name="nested-slot-content">
+						<content/> C
+					</slot>
+				</slot>
+			</slot> ` },
 }
 
 var Settings =
diff --git a/pwiki/parser.js b/pwiki/parser.js
index 8e6ddc0..978913b 100755
--- a/pwiki/parser.js
+++ b/pwiki/parser.js
@@ -392,6 +392,7 @@ module.BaseParser = {
 	// 		<func>
 	// 		| <promise>
 	// 		| <string>
+	// 		| { skip: true, ... }
 	// 		| { data: <ast> }
 	// 		| <ast>
 	//
@@ -422,6 +423,7 @@ module.BaseParser = {
 			var {name, args, body} = value
 			// nested macro -- skip...
 			if(typeof(page.macros[name]) != 'function'){
+				yield {...value, skip: true}
 				continue }
 
 			var res = 
@@ -451,10 +453,15 @@ module.BaseParser = {
 				e.call(page, state)
 				: e
 
+			// expand arrays...
 			if(e instanceof Array){
 				yield* this.resolve(page, e, state)
+			// data -- unwrap content...
 			} else if(e instanceof Object && 'data' in e){
 				yield { data: await this.resolve(page, e.data, state) }
+			// skipped items...
+			} else if(e instanceof Object && e.skip){
+				continue
 			} else {
 				yield e } } },
 
diff --git a/pwiki2-test.js b/pwiki2-test.js
index f383afa..362bd51 100755
--- a/pwiki2-test.js
+++ b/pwiki2-test.js
@@ -191,6 +191,22 @@ pwiki.pwiki
 						refilled
 					</slot>
 				</slot>
+			</slot> 
+			<br><br>
+			Content: A B C:
+			<slot name="slot-content">A</slot>
+			<slot name="slot-content"><content/> B</slot>
+			<slot name="slot-conten"><content/> C</slot>
+			<br><br>
+			Nested content: A B C:
+			<slot name="nested-slot-content">
+				A
+				<slot name="nested-slot-content">
+					<content/> B
+					<slot name="nested-slot-content">
+						<content/> C
+					</slot>
+				</slot>
 			</slot> `, })
 	.update({
 		location: '/test/nesting',
diff --git a/pwiki2.js b/pwiki2.js
index 5638bb2..9863e2d 100755
--- a/pwiki2.js
+++ b/pwiki2.js
@@ -1,9 +1,9 @@
 /**********************************************************************
 * 
 *
-* XXX might be a good idea for slots to support getting previous slot 
-* 		content, e.g.:
-* 			<slot name="header"><slot-content/> new text</slot>
+* XXX slot <content/> does not work in nested slots...
+* XXX ranges in pattern paths...
+* 		...url syntax???
 * XXX BUG?: markdown: when parsing chunks each chunk gets an open/closed 
 * 		<p> inserted at start/end -- this breaks stuff returned by macros...
 * 		...there are two ways to dance around this:
@@ -43,7 +43,7 @@
 * 			- zip (json/tree)						--
 * 		- page actions
 * 			- delete								-- DONE
-* 			- copy/move								-- 
+* 			- copy/move								-- DONE
 * 		- migrate bootstrap							--
 * 		- store topology							--
 * 		- sync and sync conf						--