diff --git a/doc/reference/config-options.rst b/doc/reference/config-options.rst
index 8a3433520..a8f637a2d 100644
--- a/doc/reference/config-options.rst
+++ b/doc/reference/config-options.rst
@@ -7,6 +7,8 @@ As explained in :ref:`acrn_configuration_tool`, ACRN scenarios define
 the hypervisor (hv) and VM settings for the execution environment of an
 ACRN-based application.  This document describes these option settings.
 
+.. rst-class:: rst-columns3
+
 .. contents::
    :local:
    :depth: 2
diff --git a/doc/scripts/configdoc.xsl b/doc/scripts/configdoc.xsl
index 2bf7e654c..d5757f23d 100644
--- a/doc/scripts/configdoc.xsl
+++ b/doc/scripts/configdoc.xsl
@@ -4,10 +4,10 @@
     version="1.0"
     xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
     xmlns:xs="http://www.w3.org/2001/XMLSchema">
-  <xsl:output method="text" />
+  <xsl:output method="text"/>
 
-  <xsl:variable name="newline" select="'&#xa;'" />
-  <xsl:variable name="section_adornment" select="'#*=-%+@`'" />
+  <xsl:variable name="newline" select="'&#xa;'"/>
+  <xsl:variable name="section_adornment" select="'#*=-%+@`'"/>
 
   <!--
       Visitors of XSD elements
@@ -16,27 +16,27 @@
   <xsl:template match="/xs:schema">
 
     <xsl:apply-templates select="xs:complexType[@name='ACRNConfigType']">
-      <xsl:with-param name="level" select="2" />
-      <xsl:with-param name="prefix" select="''" />
+      <xsl:with-param name="level" select="2"/>
+      <xsl:with-param name="prefix" select="''"/>
     </xsl:apply-templates>
 
   </xsl:template>
 
   <xsl:template match="xs:complexType[@name='ACRNConfigType']">
-    <xsl:param name="level" />
-    <xsl:param name="prefix" />
+    <xsl:param name="level"/>
+    <xsl:param name="prefix"/>
 
     <xsl:apply-templates select="descendant::xs:element">
-      <xsl:with-param name="level" select="$level" />
-      <xsl:with-param name="prefix" select="$prefix" />
+      <xsl:with-param name="level" select="$level"/>
+      <xsl:with-param name="prefix" select="$prefix"/>
     </xsl:apply-templates>
   </xsl:template>
 
   <xsl:template match="xs:element">
-    <xsl:param name="level" />
-    <xsl:param name="prefix" />
+    <xsl:param name="level"/>
+    <xsl:param name="prefix"/>
 
-    <xsl:variable name="ty" select="@type" />
+    <xsl:variable name="ty" select="@type"/>
 
     <!-- Only visit elements having complex types. Those having simple types are
          described as an option.. -->
@@ -50,28 +50,29 @@
        <!-- The section header -->
        <xsl:if test="$level &lt;= 4">
          <xsl:call-template name="section-header">
-           <xsl:with-param name="title" select="concat($prefix, @name)" />
-           <xsl:with-param name="label" select="concat($prefix, @name)" />
-           <xsl:with-param name="level" select="$level" />
+           <xsl:with-param name="title" select="concat($prefix, @name)"/>
+           <xsl:with-param name="label" select="concat($prefix, @name)"/>
+           <xsl:with-param name="level" select="$level"/>
          </xsl:call-template>
 
          <!-- Description of this menu / entry -->
          <xsl:call-template name="print-annotation" >
-            <xsl:with-param name="indent" select="''" />
+            <xsl:with-param name="indent" select="''"/>
          </xsl:call-template>
-         <xsl:value-of select="$newline" />
+
+         <xsl:value-of select="$newline"/>
 <!-- Occurence requirements (removed, but save just in case)
          <xsl:call-template name="print-occurs">
-           <xsl:with-param name="name" select="@name" />
+           <xsl:with-param name="name" select="@name"/>
          </xsl:call-template>
 -->
-          <xsl:value-of select="$newline" />
+          <xsl:value-of select="$newline"/>
        </xsl:if>
 
        <!-- Visit the complex type to generate menus and/or entries -->
        <xsl:apply-templates select="//xs:complexType[@name=$ty]">
-         <xsl:with-param name="level" select="$level" />
-         <xsl:with-param name="name" select="concat($prefix, @name)" />
+         <xsl:with-param name="level" select="$level"/>
+         <xsl:with-param name="name" select="concat($prefix, @name)"/>
        </xsl:apply-templates>
 <!-- for top level sections (level 2) put a begin/end comment for
      potential use in rst include directives -->
@@ -81,66 +82,68 @@
       </xsl:when>
       <xsl:otherwise>
        <xsl:call-template name="option-header">
-         <xsl:with-param name="label" select="concat($prefix, @name)" />
+         <xsl:with-param name="label" select="concat($prefix, @name)"/>
        </xsl:call-template>
-       <xsl:value-of select="$newline" />
+       <xsl:value-of select="$newline"/>
        <!-- Print the description, type, and occurrence requirements -->
        <xsl:text>   - </xsl:text>
        <xsl:call-template name="print-annotation" >
-          <xsl:with-param name="indent" select="'     '" />
+          <xsl:with-param name="indent" select="'     '"/>
        </xsl:call-template>
        <xsl:choose>
          <xsl:when test="//xs:simpleType[@name=$ty]">
-           <xsl:apply-templates select="//xs:simpleType[@name=$ty]" />
+           <xsl:apply-templates select="//xs:simpleType[@name=$ty]"/>
          </xsl:when>
          <xsl:when test="starts-with($ty, 'xs:')">
            <xsl:text>   - </xsl:text>
-           <xsl:value-of select="substring($ty, 4)" />
-           <xsl:value-of select="$newline" />
+           <xsl:value-of select="substring($ty, 4)"/>
+           <xsl:value-of select="$newline"/>
          </xsl:when>
          <xsl:otherwise>
-           <xsl:text>   - </xsl:text>
-           <xsl:value-of select="$ty" />
-           <xsl:value-of select="$newline" />
+<!-- element doesn't have a named type, check for an unnamed simpleType child -->
+           <xsl:apply-templates select="descendant::xs:simpleType">
+             <xsl:with-param name="level" select="$level"/>
+             <xsl:with-param name="prefix" select="''"/>
+           </xsl:apply-templates>
          </xsl:otherwise>
        </xsl:choose>
 <!-- removing occurs info for now
        <xsl:text>   - </xsl:text>
        <xsl:call-template name="print-occurs" >
-           <xsl:with-param name="name" select="@name" />
+           <xsl:with-param name="name" select="@name"/>
        </xsl:call-template>
-        <xsl:value-of select="$newline" />
+        <xsl:value-of select="$newline"/>
 -->
       </xsl:otherwise>
     </xsl:choose>
   </xsl:template>
 
   <xsl:template match="xs:complexType">
-    <xsl:param name="level" />
-    <xsl:param name="name" />
+    <xsl:param name="level"/>
+    <xsl:param name="name"/>
 
     <!-- Visit the sub-menus -->
     <xsl:apply-templates select="descendant::xs:element">
-      <xsl:with-param name="level" select="$level + 1" />
-      <xsl:with-param name="prefix" select="concat($name, '.')" />
+      <xsl:with-param name="level" select="$level + 1"/>
+      <xsl:with-param name="prefix" select="concat($name, '.')"/>
     </xsl:apply-templates>
   </xsl:template>
 
   <xsl:template match="xs:simpleType">
     <xsl:text>   - </xsl:text>
     <xsl:call-template name="print-annotation" >
-       <xsl:with-param name="indent" select="'     '" />
+       <xsl:with-param name="indent" select="'     '"/>
     </xsl:call-template>
   </xsl:template>
 
   <xsl:template name="print-occurs">
-    <xsl:param name="name" />
+    <xsl:param name="name"/>
   <!-- use the min/maxOccurs data to figure out if this is an optional
        item, and how many occurrences are allowed -->
     <xsl:variable name="min">
       <xsl:choose>
         <xsl:when test="@minOccurs">
-          <xsl:value-of select="@minOccurs" />
+          <xsl:value-of select="@minOccurs"/>
         </xsl:when>
         <xsl:otherwise>1</xsl:otherwise>
       </xsl:choose>
@@ -149,14 +152,14 @@
     <xsl:variable name="max">
       <xsl:choose>
         <xsl:when test="@maxOccurs">
-          <xsl:value-of select="@maxOccurs" />
+          <xsl:value-of select="@maxOccurs"/>
         </xsl:when>
         <xsl:otherwise>1</xsl:otherwise>
       </xsl:choose>
     </xsl:variable>
 
     <xsl:text>The **</xsl:text>
-    <xsl:value-of select="$name" />
+    <xsl:value-of select="$name"/>
     <xsl:text>** option is </xsl:text>
     <xsl:choose>
       <xsl:when test="$min = 0">
@@ -170,35 +173,57 @@
 
     <xsl:choose>
       <xsl:when test="($min = $max) or ($min = 0)">
-        <xsl:value-of select="$max" />
+        <xsl:value-of select="$max"/>
         <xsl:text> occurrence</xsl:text>
         <xsl:if test="$max &gt;  1">
           <xsl:text>s</xsl:text>
         </xsl:if>
       </xsl:when>
       <xsl:otherwise>
-        <xsl:value-of select="$min" />
+        <xsl:value-of select="$min"/>
         <xsl:text> to </xsl:text>
-        <xsl:value-of select="$max" />
+        <xsl:value-of select="$max"/>
         <xsl:text> occurrences</xsl:text>
       </xsl:otherwise>
     </xsl:choose>
     <xsl:text>.</xsl:text>
-    <xsl:value-of select="$newline" />
+    <xsl:value-of select="$newline"/>
   </xsl:template>
 
   <xsl:template name="print-annotation">
-    <xsl:param name="indent" />
+    <xsl:param name="indent"/>
+    <!-- append an (Optional) annotation if minOccurs=0) -->
+    <xsl:variable name="optional">
+      <xsl:choose>
+        <xsl:when test="@minOccurs">
+          <xsl:if test="@minOccurs = 0">
+             <xsl:text> *(Optional)*</xsl:text>
+          </xsl:if>
+        </xsl:when>
+        <!-- could show (Required) here instead, but it seemed too noisy -->
+        <xsl:otherwise><xsl:text></xsl:text></xsl:otherwise>
+      </xsl:choose>
+    </xsl:variable>
+    <!-- append a default value annotation if default was defined -->
+    <xsl:variable name="default">
+      <xsl:choose>
+        <xsl:when test="@default">
+          <xsl:value-of select="concat(' (Default value is ``', @default, '``)')"/>
+        </xsl:when>
+        <xsl:otherwise><xsl:text></xsl:text></xsl:otherwise>
+      </xsl:choose>
+    </xsl:variable>
+
     <xsl:choose>
       <xsl:when test="xs:annotation">
          <xsl:call-template name="printIndented">
-           <xsl:with-param name="text" select="xs:annotation/xs:documentation" />
-           <xsl:with-param name="indent" select="$indent" />
+           <xsl:with-param name="text" select="concat(xs:annotation/xs:documentation, $optional, $default)"/>
+           <xsl:with-param name="indent" select="$indent"/>
          </xsl:call-template>
       </xsl:when>
       <xsl:otherwise>
         <!-- <xsl:text>&lt;description is missing &gt;</xsl:text> -->
-        <xsl:value-of select="$newline" />
+        <xsl:value-of select="$newline"/>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:template>
@@ -208,69 +233,70 @@
   -->
 
   <xsl:template name="repeat">
-    <xsl:param name="string" />
-    <xsl:param name="times" />
+    <xsl:param name="string"/>
+    <xsl:param name="times"/>
     <xsl:if test="$times > 0">
-      <xsl:value-of select="$string" />
+      <xsl:value-of select="$string"/>
       <xsl:call-template name="repeat">
-       <xsl:with-param name="string" select="$string" />
-       <xsl:with-param name="times" select="$times - 1" />
+       <xsl:with-param name="string" select="$string"/>
+       <xsl:with-param name="times" select="$times - 1"/>
       </xsl:call-template>
     </xsl:if>
   </xsl:template>
 
   <xsl:template name="section-header">
-    <xsl:param name="title" />
-    <xsl:param name="label" />
-    <xsl:param name="level" />
+    <xsl:param name="title"/>
+    <xsl:param name="label"/>
+    <xsl:param name="level"/>
     <xsl:if test="$label != ''">
-      <xsl:value-of select="concat('.. _', $label, ':', $newline, $newline)" />
+      <xsl:value-of select="concat($newline, '.. _', $label, ':', $newline, $newline)"/>
     </xsl:if>
-    <xsl:value-of select="concat($title, $newline)" />
+    <xsl:value-of select="concat($title, $newline)"/>
     <xsl:call-template name="repeat">
       <xsl:with-param name="string">
-       <xsl:value-of select="substring($section_adornment, $level, 1)" />
+       <xsl:value-of select="substring($section_adornment, $level, 1)"/>
       </xsl:with-param>
-      <xsl:with-param name="times" select="string-length($title)" />
+      <xsl:with-param name="times" select="string-length($title)"/>
     </xsl:call-template>
-    <xsl:value-of select="concat($newline, $newline)" />
+    <xsl:value-of select="concat($newline, $newline)"/>
   </xsl:template>
 
   <xsl:template name="option-header">
-    <xsl:param name="label" />
+    <xsl:param name="label"/>
     <!-- we're using the reST option directive for creating linkable
          config option sections using the :option: role.  This also
          gives us the option directive HTML formatting. -->
+    <xsl:value-of select="$newline"/>
     <xsl:text>.. option:: </xsl:text>
-    <xsl:value-of select="$label" />
-    <xsl:value-of select="$newline" />
+    <xsl:value-of select="$label"/>
+    <xsl:value-of select="$newline"/>
   </xsl:template>
 
 <xsl:template name="printIndented">
-  <xsl:param name="text" />
-  <xsl:param name="indent" />
+  <xsl:param name="text"/>
+  <xsl:param name="indent"/>
   <!-- Handle multi-line documentation text and indent it properly for
        the bullet list display we're using for node descriptions (but not for
        heading descriptions -->
   <xsl:if test="$text">
-    <xsl:variable name="thisLine" select="substring-before($text, $newline)" />
-    <xsl:variable name="nextLine" select="substring-after($text, $newline)" />
+    <xsl:variable name="thisLine" select="substring-before($text, $newline)"/>
+    <xsl:variable name="nextLine" select="substring-after($text, $newline)"/>
     <xsl:choose>
       <xsl:when test="$thisLine or $nextLine">
         <!-- $text contains at least one newline, and there's more coming so print it -->
-        <xsl:value-of select="concat($thisLine, $newline)" />
+        <xsl:value-of select="concat($thisLine, $newline)"/>
         <!-- watch for two newlines in a row and avoid writing the indent -->
         <xsl:if test="substring-before(concat($nextLine, $newline), $newline)" >
-          <xsl:value-of select="$indent" />
+          <xsl:value-of select="$indent"/>
         </xsl:if>
         <!-- and recurse to process the rest -->
         <xsl:call-template name="printIndented">
-          <xsl:with-param name="text" select="$nextLine" />
-          <xsl:with-param name="indent" select="$indent" />
+          <xsl:with-param name="text" select="$nextLine"/>
+          <xsl:with-param name="indent" select="$indent"/>
         </xsl:call-template>
       </xsl:when>
       <xsl:otherwise>
-        <xsl:value-of select="concat($text, $newline)" />
+        <xsl:value-of select="concat($text, $newline)"/>
       </xsl:otherwise>
     </xsl:choose>
   </xsl:if>
diff --git a/doc/tutorials/enable_ivshmem.rst b/doc/tutorials/enable_ivshmem.rst
index 025ddb742..20e7723f9 100644
--- a/doc/tutorials/enable_ivshmem.rst
+++ b/doc/tutorials/enable_ivshmem.rst
@@ -33,6 +33,8 @@ where
 
 .. note:: This device can be used with real-time VM (RTVM) as well.
 
+.. _ivshmem-hv:
+
 ivshmem hv-land usage
 *********************
 
diff --git a/misc/config_tools/schema/VMtypes.xsd b/misc/config_tools/schema/VMtypes.xsd
index f1e031972..cf2cb1f4f 100644
--- a/misc/config_tools/schema/VMtypes.xsd
+++ b/misc/config_tools/schema/VMtypes.xsd
@@ -29,14 +29,14 @@
 <xs:simpleType name="GuestFlagsOptionsType">
   <xs:annotation>
     <xs:documentation>
-- 0, 0UL and empty string means there is no guest flag is enabled.
-- ``GUEST_FLAG_SECURE_WORLD_ENABLED`` specify whether the secure world is
+- ``0``, ``0UL``, or an empty string means no guest flags are enabled.
+- ``GUEST_FLAG_SECURE_WORLD_ENABLED`` specify that the secure world is
   enabled
-- ``GUEST_FLAG_LAPIC_PASSTHROUGH`` specify whether LAPIC is passed through
-- ``GUEST_FLAG_IO_COMPLETION_POLLING`` specify whether the hypervisor needs
+- ``GUEST_FLAG_LAPIC_PASSTHROUGH`` specify that LAPIC is passed through
+- ``GUEST_FLAG_IO_COMPLETION_POLLING`` specify that the hypervisor needs
   IO polling to completion
-- ``GUEST_FLAG_HIDE_MTRR`` specify whether to hide MTRR from the VM
-- ``GUEST_FLAG_RT`` specify whether the VM is RT-VM (real-time)</xs:documentation>
+- ``GUEST_FLAG_HIDE_MTRR`` specify that MTRR is hidden from the VM
+- ``GUEST_FLAG_RT`` specify that the VM is an RT-VM (real-time)</xs:documentation>
   </xs:annotation>
   <xs:restriction base="xs:string">
     <xs:enumeration value="" />
@@ -64,7 +64,8 @@
   <xs:sequence>
     <xs:element name="pcpu_id" type="xs:integer" default="2" maxOccurs="unbounded">
       <xs:annotation>
-        <xs:documentation>A pCPU that this VM's vCPU is allowed to pin to.</xs:documentation>
+        <xs:documentation>A pCPU that this VM's vCPU is allowed to pin
+to.</xs:documentation>
       </xs:annotation>
     </xs:element>
   </xs:sequence>
@@ -76,7 +77,8 @@
       <xs:annotation>
         <xs:documentation>Configure each CPU in VMs to a desired CLOS ID in the ``VM`` section of the
 scenario file. Follow :ref:`rdt_detection_capabilities`
-to identify the maximum supported CLOS ID that can be used.</xs:documentation>
+to identify the maximum supported CLOS ID that can be used. Default
+value ``0``.</xs:documentation>
       </xs:annotation>
     </xs:element>
   </xs:sequence>
@@ -94,7 +96,8 @@ to identify the maximum supported CLOS ID that can be used.</xs:documentation>
     </xs:element>
     <xs:element name="size" type="HexFormat" default="0">
       <xs:annotation>
-        <xs:documentation>SGX EPC section size in Bytes, must be page aligned.</xs:documentation>
+        <xs:documentation>SGX EPC section size in Bytes, must be page
+aligned.</xs:documentation>
       </xs:annotation>
     </xs:element>
   </xs:sequence>
@@ -104,22 +107,26 @@ to identify the maximum supported CLOS ID that can be used.</xs:documentation>
   <xs:sequence>
     <xs:element name="start_hpa" type="HexFormat" default="0x100000000">
       <xs:annotation>
-        <xs:documentation>The start physical address in host for the VM.</xs:documentation>
+        <xs:documentation>The starting physical address in host for the
+VM.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="size" type="MemorySizeType" default="0x20000000">
       <xs:annotation>
-        <xs:documentation>The memory size in bytes for the VM.</xs:documentation>
+        <xs:documentation>The memory size in bytes for the VM. Default
+value is ``0x200000000``.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="start_hpa2" type="HexFormat" default="0x0" minOccurs="0">
       <xs:annotation acrn:configurable="n">
-        <xs:documentation>Start of second HPA for non-contiguous allocations in host for the VM.</xs:documentation>
+        <xs:documentation>Start of second HPA for non-contiguous
+allocations in host for the VM.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="size_hpa2" type="MemorySizeType" default="0x0" minOccurs="0">
       <xs:annotation acrn:configurable="n">
-        <xs:documentation>Memory size of second HPA for non-contiguous allocations in Bytes for the VM.</xs:documentation>
+        <xs:documentation>Memory size of second HPA for non-contiguous
+allocations in Bytes for the VM.</xs:documentation>
       </xs:annotation>
     </xs:element>
   </xs:sequence>
@@ -128,10 +135,13 @@ to identify the maximum supported CLOS ID that can be used.</xs:documentation>
 <xs:complexType name="OSConfigurations">
   <xs:sequence>
     <xs:element name="name">
-      <xs:simpleType>
         <xs:annotation>
-          <xs:documentation>Specify the OS name of VM; currently, it is not referenced by the hypervisor code.String from 1 to 32
-characters long.</xs:documentation>
+          <xs:documentation>Specify the OS name of VM.
+Is not referenced by the hypervisor code. </xs:documentation>
+        </xs:annotation>
+        <xs:simpleType>
+        <xs:annotation>
+          <xs:documentation>A string with 1 to 32 characters.</xs:documentation>
         </xs:annotation>
         <xs:restriction base="xs:string">
           <xs:minLength value="1" />
@@ -141,8 +151,7 @@ characters long.</xs:documentation>
     </xs:element>
     <xs:element name="kern_type" type="VMKernelType">
       <xs:annotation>
-        <xs:documentation>Specify the kernel image type so that the hypervisor can load it correctly.
-Currently supports ``KERNEL_BZIMAGE`` and ``KERNEL_ZEPHYR``.</xs:documentation>
+        <xs:documentation>Specify the kernel image type so the hypervisor can load it correctly.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="kern_mod" type="xs:string">
@@ -177,8 +186,8 @@ must exactly match the module tag in the GRUB multiboot cmdline.</xs:documentati
 
 <xs:simpleType name="VMKernelType">
   <xs:annotation>
-    <xs:documentation>Specify the kernel image type so that the hypervisor can load it correctly.
-Currently supports ``KERNEL_BZIMAGE`` and ``KERNEL_ZEPHYR``.</xs:documentation>
+    <xs:documentation>A string with either ``KERNEL_BZIMAGE`` or
+``KERNEL_ZEPHYR``.</xs:documentation>
   </xs:annotation>
   <xs:restriction base="xs:string">
     <xs:enumeration value="KERNEL_BZIMAGE" />
@@ -198,7 +207,9 @@ Currently supports ``KERNEL_BZIMAGE`` and ``KERNEL_ZEPHYR``.</xs:documentation>
 
 <xs:simpleType name="LegacyVuartBase">
   <xs:annotation>
-    <xs:documentation>vUART (A.K.A COM) enabling switch. Enable by exposing its base address, disable by returning INVALID_COM_BASE.</xs:documentation>
+    <xs:documentation>A string with either ``SOS_COM1_BASE``,
+``SOS_COM2_BASE``, ``COM1_BASE``, ``COM2_BASE``, ``COM3_BASE``,
+``COM4_BASE``, or indicating it's disabled with ``INVALID_COM_BASE``.</xs:documentation>
   </xs:annotation>
   <xs:restriction base="xs:string">
     <xs:enumeration value="SOS_COM1_BASE" />
@@ -213,7 +224,9 @@ Currently supports ``KERNEL_BZIMAGE`` and ``KERNEL_ZEPHYR``.</xs:documentation>
 
 <xs:simpleType name="LegacyVuartIrq">
   <xs:annotation acrn:configurable="n">
-    <xs:documentation>vCOM irq</xs:documentation>
+    <xs:documentation>A string with either ``SOS_COM1_IRQ``,
+``SOS_COM2_IRQ``, ``COM1_IRQ``, ``COM2_IRQ``, ``COM3_IRQ``,
+``COM4_IRQ``, ``CONFIG_COM_IRQ``, ``3``, ``4``, ``6``, or ``7``.</xs:documentation>
   </xs:annotation>
   <xs:restriction base="xs:string">
     <xs:enumeration value="SOS_COM1_IRQ" />
@@ -230,17 +243,19 @@ Currently supports ``KERNEL_BZIMAGE`` and ``KERNEL_ZEPHYR``.</xs:documentation>
   </xs:restriction>
 </xs:simpleType>
 
-<xs:complexType name="LegancyVuartConfiguration">
+<xs:complexType name="LegacyVuartConfiguration">
   <xs:sequence>
     <xs:element name="type" type="LegacyVuartType" default="VUART_LEGACY_PIO">
       <xs:annotation>
-        <xs:documentation>vUART (aka COM) type; currently only supports the legacy PIO mode.</xs:documentation>
+        <xs:documentation>vUART (COM) type; only legacy PIO mode is
+supported.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="base" type="LegacyVuartBase">
       <xs:annotation>
-        <xs:documentation>vUART (A.K.A COM) enabling switch. Enable by exposing its COM_BASE
-(SOS_COM_BASE for Service VM); disable by returning INVALID_COM_BASE.</xs:documentation>
+        <xs:documentation>vUART (COM) enabling switch. Enable by exposing its COM_BASE
+(e.b., ``SOS_COM1_BASE`` for Service VM); disable by returning
+``INVALID_COM_BASE``.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="irq" type="LegacyVuartIrq">
@@ -265,8 +280,8 @@ target VM the current VM connects to.</xs:documentation>
 
 <xs:simpleType name="PCIVuartBase">
   <xs:annotation>
-    <xs:documentation>PCI based vUART enabling switch. Enable by specifying PCI_VUART;
-disable by returning INVALID_PCI_BASE.</xs:documentation>
+    <xs:documentation>A string with ``PCI_VUART`` or indicating its
+disabled using ``INVALID_PCI_BASE``.</xs:documentation>
   </xs:annotation>
   <xs:restriction base="xs:string">
     <xs:enumeration value="PCI_VUART" />
@@ -279,7 +294,8 @@ disable by returning INVALID_PCI_BASE.</xs:documentation>
     <xs:element name="base" type="PCIVuartBase" default="INVALID_PCI_BASE">
       <xs:annotation>
         <xs:documentation>Console vUART (A.K.A PCI based vUART) enabling switch.
-  Enable by specifying PCI_VUART; disable by returning INVALID_PCI_BASE.</xs:documentation>
+Enable by specifying PCI_VUART; disable by specifying
+``INVALID_PCI_BASE``.</xs:documentation>
       </xs:annotation>
     </xs:element>
   </xs:sequence>
@@ -291,7 +307,8 @@ disable by returning INVALID_PCI_BASE.</xs:documentation>
     <xs:element name="base" type="PCIVuartBase" default="INVALID_PCI_BASE">
       <xs:annotation>
         <xs:documentation>Communication vUART (A.K.A PCI based vUART) enabling switch.
-Enable by specifying PCI_VUART; disable by returning INVALID_PCI_BASE.</xs:documentation>
+Enable by specifying PCI_VUART; disable by specifying
+``INVALID_PCI_BASE``.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="target_vm_id" type="xs:integer">
@@ -312,12 +329,13 @@ Enable by specifying PCI_VUART; disable by returning INVALID_PCI_BASE.</xs:docum
   <xs:sequence>
     <xs:element name="TPM2" type="Boolean" default="n" minOccurs="0">
       <xs:annotation>
-        <xs:documentation>TPM2 device to passthrough.</xs:documentation>
+        <xs:documentation>Specify TPM2 device to passthrough.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="p2sb" type="Boolean" default="n" minOccurs="0">
       <xs:annotation>
-        <xs:documentation>Exposing the P2SB (Primary-to-Sideband) bridge to the pre-launched VM.</xs:documentation>
+        <xs:documentation>Expose the P2SB (Primary-to-Sideband) bridge
+to the pre-launched VM.</xs:documentation>
       </xs:annotation>
     </xs:element>
   </xs:sequence>
diff --git a/misc/config_tools/schema/config.xsd b/misc/config_tools/schema/config.xsd
index bfb136007..01b0a2c26 100644
--- a/misc/config_tools/schema/config.xsd
+++ b/misc/config_tools/schema/config.xsd
@@ -16,54 +16,55 @@
     <xs:element name="RELEASE" type="Boolean" default="n">
       <xs:annotation>
         <xs:documentation>Build an image for release (``y``) or debug (``n``).
-In a **release** image, assertions are not enforced and these features
-are **not** available:
-
-- logs
-- serial console
-- hypervisor shell</xs:documentation>
+In a **release** image, assertions are not enforced and debugging
+features are disabled, including logs, serial console, and the
+hypervisor shell.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="SERIAL_CONSOLE" type="SerialConsoleOptions" default="/dev/ttyS0">
       <xs:annotation>
         <xs:documentation>Specify the host serial device used for hypervisor debugging.
-This option is only valid if the Service VM 'legacy_vuart` is
-enabled. Leave this filed empty if the Service VM's 'console_vuart` is enabled. Uses
-`bootargs` for `console_vuart` configuration.</xs:documentation>
+This option is only valid if the Service VM :ref:`vm.legacy_vuart` is
+enabled. Leave this field empty if the Service VM's :ref:`vm.console_vuart` is enabled. Uses
+:option:`vm.os_config.bootargs` for :ref:`vm.console_vuart`
+configuration.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="MEM_LOGLEVEL" type="LogLevelType" default="5">
       <xs:annotation>
-        <xs:documentation>Default loglevel for log messages stored in memory.
-Messages with a lower severity (higher value) are discarded.</xs:documentation>
+        <xs:documentation>Default loglevel for log messages stored in
+memory. Value can be changed at runtime.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="NPK_LOGLEVEL" type="LogLevelType" default="5">
       <xs:annotation>
-        <xs:documentation>Default loglevel for the hypervisor NPK log.</xs:documentation>
+        <xs:documentation>Default loglevel for the hypervisor North Peak
+(NPK) log. Value can be changed at runtime.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="CONSOLE_LOGLEVEL" type="LogLevelType" default="3">
       <xs:annotation>
         <xs:documentation>Default loglevel for log messages
-written to the serial console. Messages with lower severity (higher
-value) are not displayed.</xs:documentation>
+written to the serial console.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="LOG_DESTINATION" default="7">
-    <xs:simpleType>
       <xs:annotation>
         <xs:documentation>Bitmap indicating the destination of log messages.
-Currently there are three log destinations available:
+There are three log destinations available:
 
-- bit 0 for the serial console (``0x1``),
-- bit 1 for the Service VM log (``0x2``), and
-- bit 2 for the NPK log (``0x4``).
+- bit 0 enables the serial console (``0x1``),
+- bit 1 enables the Service VM log (``0x2``), and
+- bit 2 enables the NPK log (``0x4``).
 
 For example, a value of ``3`` enables only the
 serial console and Service VM logs. Effective only in debug builds (when
 :option:`hv.DEBUG_OPTIONS.RELEASE` is ``n``).</xs:documentation>
       </xs:annotation>
+    <xs:simpleType>
+      <xs:annotation>
+        <xs:documentation>integer value from 0 to 7.</xs:documentation>
+      </xs:annotation>
       <xs:restriction base="xs:integer">
         <xs:minInclusive value="0" />
         <xs:maxInclusive value="7" />
@@ -81,13 +82,14 @@ physical cpu, for example, ``0x40000``.</xs:documentation>
 
 <xs:complexType name="FeatureOptionsType">
   <xs:annotation>
-    <xs:documentation>Options for hypervisor feature enablement.</xs:documentation>
+    <xs:documentation>Options for enabling hypervisor features.</xs:documentation>
   </xs:annotation>
 
   <xs:all>
     <xs:element name="RELOC" type="Boolean" default="y">
       <xs:annotation>
-        <xs:documentation>Specify if hypervisor relocation is enabled on booting.</xs:documentation>
+        <xs:documentation>Specify if hypervisor relocation is enabled on
+booting.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="SCHEDULER" type="SchedulerType" default="SCHED_BVT">
@@ -127,7 +129,8 @@ of DMA operations.</xs:documentation>
     </xs:element>
     <xs:element name="L1D_VMENTRY_ENABLED" type="Boolean" default="n">
       <xs:annotation>
-        <xs:documentation>Enable L1 cache flush before VM entry.</xs:documentation>
+        <xs:documentation>Enable L1 cache flush before VM entry. Default
+value ``n``.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="MCE_ON_PSC_DISABLED" type="Boolean" default="n">
@@ -172,22 +175,25 @@ the RAM region used by the hypervisor.</xs:documentation>
     <xs:element name="LOW_RAM_SIZE" type="HexFormat" default="0x00010000">
       <xs:annotation>
         <xs:documentation>Size of the low RAM region below address
-``0x10000``, starting from address ``0x0``..</xs:documentation>
+``0x10000``, starting from address ``0x0``.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="UOS_RAM_SIZE" type="HexFormat" default="0x200000000">
       <xs:annotation>
-        <xs:documentation>Size of the User VM OS RAM region.</xs:documentation>
+        <xs:documentation>Size of the User VM OS RAM region. Default
+value ``0x200000000``.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="SOS_RAM_SIZE" type="HexFormat" default="0x400000000">
       <xs:annotation>
-        <xs:documentation>Size of the Service VM OS RAM region.</xs:documentation>
+        <xs:documentation>Size of the Service VM OS RAM region. Default
+value ``0x400000000``.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="PLATFORM_RAM_SIZE" type="HexFormat" default="0x400000000">
       <xs:annotation>
-        <xs:documentation>Size of the physical platform RAM.</xs:documentation>
+        <xs:documentation>Size of the physical platform RAM. Default
+value ``0x400000000``.</xs:documentation>
       </xs:annotation>
     </xs:element>
   </xs:all>
@@ -201,7 +207,8 @@ maximum supported resource.</xs:documentation>
   <xs:all>
     <xs:element name="IOMMU_BUS_NUM" type="HexFormat" default="0x100">
       <xs:annotation>
-        <xs:documentation>Highest PCI bus ID used during IOMMU initialization.</xs:documentation>
+        <xs:documentation>Highest PCI bus ID used during IOMMU
+initialization.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="MAX_IR_ENTRIES" type="xs:integer" default="256">
@@ -210,10 +217,13 @@ maximum supported resource.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="MAX_IOAPIC_NUM" default="1">
+      <xs:annotation>
+        <xs:documentation>Maximum number of IOAPICs.</xs:documentation>
+      </xs:annotation>
       <xs:simpleType>
-        <xs:annotation>
-          <xs:documentation>Maximum number of IO-APICs. Integer from 1 to 10.</xs:documentation>
-        </xs:annotation>
+         <xs:annotation>
+           <xs:documentation>integer from 1 to 10.</xs:documentation>
+         </xs:annotation>
         <xs:restriction base="xs:integer">
           <xs:minInclusive value="1" />
           <xs:maxInclusive value="10" />
@@ -222,14 +232,17 @@ maximum supported resource.</xs:documentation>
     </xs:element>
     <xs:element name="MAX_KATA_VM_NUM" type="xs:integer" minOccurs="0" default="0">
       <xs:annotation>
-        <xs:documentation>>Maximum number of KATA VM.</xs:documentation>
+        <xs:documentation>Maximum number of KATA VM.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="MAX_PCI_DEV_NUM" default="96">
+      <xs:annotation>
+        <xs:documentation>Maximum number of PCI devices.</xs:documentation>
+      </xs:annotation>
       <xs:simpleType>
-        <xs:annotation>
-          <xs:documentation>Maximum number of PCI devices.Integer from 1 to 1024.</xs:documentation>
-        </xs:annotation>
+         <xs:annotation>
+           <xs:documentation>integer from 1 to 1024.</xs:documentation>
+         </xs:annotation>
         <xs:restriction base="xs:integer">
           <xs:minInclusive value="1" />
           <xs:maxInclusive value="1024" />
@@ -237,10 +250,13 @@ maximum supported resource.</xs:documentation>
       </xs:simpleType>
     </xs:element>
     <xs:element name="MAX_IOAPIC_LINES" default="120">
+      <xs:annotation>
+        <xs:documentation>Maximum number of interrupt lines per IOAPIC.</xs:documentation>
+      </xs:annotation>
       <xs:simpleType>
-        <xs:annotation>
-          <xs:documentation>Maximum number of interrupt lines per IOAPIC.Integer from 1 to 120.</xs:documentation>
-        </xs:annotation>
+         <xs:annotation>
+           <xs:documentation>integer from 1 to 120.</xs:documentation>
+         </xs:annotation>
         <xs:restriction base="xs:integer">
           <xs:minInclusive value="1" />
           <xs:maxInclusive value="120" />
@@ -249,14 +265,17 @@ maximum supported resource.</xs:documentation>
     </xs:element>
     <xs:element name="MAX_PT_IRQ_ENTRIES" type="xs:integer" default="256">
       <xs:annotation>
-        <xs:documentation>Maximum number of interrupt source for PT devices.</xs:documentation>
+        <xs:documentation>Maximum number of interrupt source for PT
+devices.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="MAX_MSIX_TABLE_NUM" default="64">
+        <xs:annotation>
+          <xs:documentation>Maximum number of MSI-X tables per device.</xs:documentation>
+        </xs:annotation>
       <xs:simpleType>
         <xs:annotation>
-          <xs:documentation>Maximum number of MSI-X tables per device.
-Leave blank if not sure.Integer from 1 to 2048.</xs:documentation>
+          <xs:documentation>integer value from 1 to 2048.</xs:documentation>
         </xs:annotation>
         <xs:restriction base="xs:integer">
           <xs:minInclusive value="1" />
@@ -265,9 +284,12 @@ Leave blank if not sure.Integer from 1 to 2048.</xs:documentation>
       </xs:simpleType>
     </xs:element>
     <xs:element name="MAX_EMULATED_MMIO" default="16">
+        <xs:annotation>
+          <xs:documentation>Maximum number of emulated MMIO regions.</xs:documentation>
+        </xs:annotation>
       <xs:simpleType>
         <xs:annotation>
-          <xs:documentation>Maximum number of emulated MMIO regions.Integer from 1 to 128.</xs:documentation>
+          <xs:documentation>integer value from 1 to 128.</xs:documentation>
         </xs:annotation>
         <xs:restriction base="xs:integer">
           <xs:minInclusive value="1" />
@@ -311,11 +333,13 @@ Leave blank if not sure.Integer from 1 to 2048.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="name" minOccurs="0">
-      <xs:simpleType>
         <xs:annotation>
           <xs:documentation>Specify the VM name shown in the
-  hypervisor console ``vm_lists`` command. String from 1 to 32
-  characters long.</xs:documentation>
+hypervisor console ``vm_lists`` command.</xs:documentation>
+        </xs:annotation>
+      <xs:simpleType>
+        <xs:annotation>
+          <xs:documentation>string from 1 to 32 characters long.</xs:documentation>
         </xs:annotation>
         <xs:restriction base="xs:string">
           <xs:minLength value="1" />
@@ -346,35 +370,16 @@ Refer SDM 17.19.2 for details, and use with caution.</xs:documentation>
     </xs:element>
     <xs:element name="memory" type="MemoryInfo" minOccurs="0">
       <xs:annotation>
-        <xs:documentation>Specify memory information for hypervisor, Service OS and User OS:
-
-- ``STACK_SIZE``: Capacity of one stack, in bytes.
-- ``HV_RAM_SIZE``: Size of the RAM region used by the hypervisor.
-- ``HV_RAM_STAR``: 2M-aligned Start physical address of the RAM region used by the hypervisor.
-- ``LOW_RAM_SIZE``: Size of the low RAM region.
-- ``SOS_RAM_SIZE``: Size of the Service OS (SOS) RAM.
-- ``PLATFORM_RAM_SIZE``: Size of the physical platform RAM.</xs:documentation>
+        <xs:documentation>Specify memory information for Service and User VMs.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="os_config" type="OSConfigurations" minOccurs="0">
       <xs:annotation>
-        <xs:documentation>General information for host kernel, boot argument and memory,
-the following elements are configured in this section:
-
-- ``name``: Specify the OS name of VM; currently, it is not referenced by the hypervisor code.
-- ``kern_type``: Specify the kernel image type so that the hypervisor can load it correctly.
-  Currently supports ``KERNEL_BZIMAGE`` and ``KERNEL_ZEPHYR``.
-- ``kern_mod``: The tag for the kernel image that acts as a multiboot module; it must
-  exactly match the module tag in the GRUB multiboot cmdline.
-- ``ramdisk_mod``: The tag for the ramdisk image, which acts as a multiboot module; it
-  must exactly match the module tag in the GRUB multiboot cmdline.
-- ``bootargs``: For internal use only and is not configurable. Specify the kernel boot arguments
-  in ``bootargs`` under the parent of ``board_private``.
-- ``kern_load_addr``: The loading address in host memory for the VM kernel.
-- ``kern_entry_addr``: The entry address in host memory for the VM kernel.</xs:documentation>
+        <xs:documentation>General information for host kernel, boot
+argument and memory.</xs:documentation>
       </xs:annotation>
     </xs:element>
-    <xs:element name="legacy_vuart" type="LegancyVuartConfiguration" minOccurs="2" maxOccurs="2">
+    <xs:element name="legacy_vuart" type="LegacyVuartConfiguration" minOccurs="2" maxOccurs="2">
       <xs:annotation>
         <xs:documentation>Specify the vUART (aka COM) with the vUART ID by its ``id`` attribute.
 Refer to :ref:`vuart_config` for detailed vUART settings.</xs:documentation>
@@ -389,7 +394,7 @@ its ``id`` attribute.</xs:documentation>
     <xs:element name="communication_vuart" type="CommunicationVuartConfiguration" maxOccurs="unbounded">
       <xs:annotation>
         <xs:documentation>Specify the communication vUART (aka PCI based vUART) with the vUART ID by
-its ``id`` attribute. When it is enabled, specify which target VM's vuart the current VM connects to.</xs:documentation>
+its ``id`` attribute. When it is enabled, specify which target VM's vUART the current VM connects to.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="mmio_resources" type="MMIOResourcesConfiguration" minOccurs="0">
@@ -409,7 +414,7 @@ its ``id`` attribute. When it is enabled, specify which target VM's vuart the cu
     </xs:element>
     <xs:element name="pci_devs" type="PCIDevsConfiguration" minOccurs="0">
       <xs:annotation>
-        <xs:documentation>pci devices list.</xs:documentation>
+        <xs:documentation>PCI devices list.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="board_private" type="BoardPrivateConfiguration" minOccurs="0" />
diff --git a/misc/config_tools/schema/types.xsd b/misc/config_tools/schema/types.xsd
index 897d03970..ee2b7cc3d 100644
--- a/misc/config_tools/schema/types.xsd
+++ b/misc/config_tools/schema/types.xsd
@@ -28,21 +28,21 @@
 
 <xs:simpleType name="HVRamSizeType">
   <xs:annotation>
-    <xs:documentation>Either empty, or a hexadecimal value.</xs:documentation>
+    <xs:documentation>Either empty, or an integer value in hexadecimal format.</xs:documentation>
   </xs:annotation>
   <xs:union memberTypes="None HexFormat" />
 </xs:simpleType>
 
 <xs:simpleType name="HVRamStartType">
   <xs:annotation>
-    <xs:documentation>Either empty, or a hexadecimal value.</xs:documentation>
+    <xs:documentation>Either empty, or an integer value in hexadecimal format.</xs:documentation>
   </xs:annotation>
   <xs:union memberTypes="None HexFormat" />
 </xs:simpleType>
 
 <xs:simpleType name="MaxMsixTableNumType">
   <xs:annotation>
-    <xs:documentation>Integer from 1 to 2048.</xs:documentation>
+    <xs:documentation>integer from 1 to 2048.</xs:documentation>
   </xs:annotation>
   <xs:restriction base="xs:integer">
     <xs:minInclusive value="1" />
@@ -65,8 +65,7 @@
 
 <xs:simpleType name="MemorySizeType">
   <xs:annotation>
-    <xs:documentation>Either a hexadecimal value or the string
-``CONFIG_SOS_RAM_SIZE``.</xs:documentation>
+    <xs:documentation>An integer value in hexadecimal format.</xs:documentation>
   </xs:annotation>
   <xs:union memberTypes="SOSRamSize HexFormat" />
 </xs:simpleType>
@@ -83,9 +82,8 @@ severity and intent:
 - 5 (LOG_INFO) informational
 - 6 (LOG_DEBUG) debug-level messages
 
-Note that lower values have a higher severity. Only log messages with a
-severity level higher (lower value) than a specified value will be
-recorded.</xs:documentation>
+A lower value has a higher severity. Log messages with a
+higher value (lower severity) are discarded.</xs:documentation>
   </xs:annotation>
   <xs:restriction base="xs:integer">
     <xs:minInclusive value="0" />
@@ -125,7 +123,7 @@ Read more about the available scheduling options in :ref:`cpu_sharing`.</xs:docu
 
 <xs:simpleType name="SerialConsoleOptions">
   <xs:annotation>
-    <xs:documentation>Either empty or a string.</xs:documentation>
+    <xs:documentation>Either empty or a string, such as ``/dev/ttyS0``.</xs:documentation>
   </xs:annotation>
   <xs:union memberTypes="None SerialConsoleType" />
 </xs:simpleType>
@@ -138,7 +136,9 @@ Read more about the available scheduling options in :ref:`cpu_sharing`.</xs:docu
 
 <xs:simpleType name="IVSHMEMRegionType">
   <xs:annotation>
-    <xs:documentation>Either empty or a string.</xs:documentation>
+    <xs:documentation>Either empty or a string naming the shared region,
+its size, and the VM IDs that can access it, such as ``hv:/shm_region_0, 2, 0:2``.
+See :ref:`ivshmem-hv` for more information.</xs:documentation>
   </xs:annotation>
   <xs:union memberTypes="None IVSHMEMRegionPattern" />
 
@@ -148,7 +148,8 @@ Read more about the available scheduling options in :ref:`cpu_sharing`.</xs:docu
   <xs:sequence>
    <xs:element name="IVSHMEM_ENABLED" type="Boolean" default="n">
      <xs:annotation>
-       <xs:documentation>Enable inter-VM shared memory (IVSHMEM) feature.</xs:documentation>
+       <xs:documentation>Enable inter-VM shared memory (IVSHMEM)
+feature.</xs:documentation>
      </xs:annotation>
    </xs:element>
    <xs:element name="IVSHMEM_REGION" type="IVSHMEMRegionType">
@@ -181,7 +182,8 @@ RDT, setting this option to ``y`` is ignored.</xs:documentation>
       <xs:annotation>
         <xs:documentation>Specify whether to enable Code and Data Prioritization (CDP).
 CDP is an extension of CAT. Set to 'y' to enable the feature or 'n' to disable it.
-The 'y' will be ignored when hardware does not support CDP.</xs:documentation>
+The 'y' will be ignored when hardware does not support CDP. Default
+value ``n``.</xs:documentation>
       </xs:annotation>
     </xs:element>
     <xs:element name="CLOS_MASK" type="xs:string"  minOccurs="0" maxOccurs="unbounded">
@@ -202,7 +204,8 @@ are allowed. The value will be ignored when hardware does not support RDT.</xs:d
   <xs:sequence>
     <xs:element name="PSRAM_ENABLED" type="Boolean" default="n">
       <xs:annotation>
-        <xs:documentation>Enable PTCM (Platform Tuning Configuration Manager).</xs:documentation>
+        <xs:documentation>Enable PTCM (Platform Tuning Configuration
+Manager).</xs:documentation>
       </xs:annotation>
     </xs:element>
   </xs:sequence>