5.7 http://schemas.microsoft.com/ink/2010/main Schema

 <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://schemas.microsoft.com/ink/2010/main" xmlns="http://schemas.microsoft.com/ink/2010/main" xmlns:msink="http://schemas.microsoft.com/ink/2010/main">
   <xsd:simpleType name="ST_KnownCtxNodeType">
     <xsd:restriction base="xsd:string">
       <xsd:enumeration value="root"/>
       <xsd:enumeration value="unclassifiedInk"/>
       <xsd:enumeration value="writingRegion"/>
       <xsd:enumeration value="analysisHint"/>
       <xsd:enumeration value="object"/>
       <xsd:enumeration value="inkDrawing"/>
       <xsd:enumeration value="image"/>
       <xsd:enumeration value="paragraph"/>
       <xsd:enumeration value="line"/>
       <xsd:enumeration value="inkBullet"/>
       <xsd:enumeration value="inkWord"/>
       <xsd:enumeration value="textWord"/>
       <xsd:enumeration value="customRecognizer"/>
       <xsd:enumeration value="mathRegion"/>
       <xsd:enumeration value="mathEquation"/>
       <xsd:enumeration value="mathStruct"/>
       <xsd:enumeration value="mathSymbol"/>
       <xsd:enumeration value="mathIdentifier"/>
       <xsd:enumeration value="mathOperator"/>
       <xsd:enumeration value="mathNumber"/>
       <xsd:enumeration value="nonInkDrawing"/>
       <xsd:enumeration value="groupNode"/>
       <xsd:enumeration value="mixedDrawing"/>
     </xsd:restriction>
   </xsd:simpleType>
   <xsd:simpleType name="ST_Guid">
     <xsd:restriction base="xsd:token">
       <xsd:pattern value="\{[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}\}"/>
     </xsd:restriction>
   </xsd:simpleType>
   <xsd:simpleType name="ST_Ref">
     <xsd:union memberTypes="msink:ST_Guid xsd:unsignedInt"/>
   </xsd:simpleType>
   <xsd:simpleType name="ST_CtxNodeType">
     <xsd:union memberTypes="msink:ST_KnownCtxNodeType msink:ST_Guid"/>
   </xsd:simpleType>
   <xsd:simpleType name="ST_Dir">
     <xsd:restriction base="xsd:string">
       <xsd:enumeration value="to"/>
       <xsd:enumeration value="from"/>
       <xsd:enumeration value="with"/>
     </xsd:restriction>
   </xsd:simpleType>
   <xsd:simpleType name="ST_KnownSemanticType">
     <xsd:restriction base="xsd:string">
       <xsd:enumeration value="none"/>
       <xsd:enumeration value="underline"/>
       <xsd:enumeration value="strikethrough"/>
       <xsd:enumeration value="highlight"/>
       <xsd:enumeration value="scratchOut"/>
       <xsd:enumeration value="verticalRange"/>
       <xsd:enumeration value="callout"/>
       <xsd:enumeration value="enclosure"/>
       <xsd:enumeration value="comment"/>
       <xsd:enumeration value="container"/>
       <xsd:enumeration value="connector"/>
     </xsd:restriction>
   </xsd:simpleType>
   <xsd:simpleType name="ST_SemanticType">
     <xsd:union memberTypes="ST_KnownSemanticType xsd:unsignedInt"/>
   </xsd:simpleType>
   <xsd:simpleType name="ST_Point">
     <xsd:restriction base="xsd:string">
       <xsd:pattern value="-?[0-9]+,-?[0-9]+"/>
     </xsd:restriction>
   </xsd:simpleType>
   <xsd:simpleType name="ST_Points">
     <xsd:list itemType="msink:ST_Point"/>
   </xsd:simpleType>
   <xsd:complexType name="CT_Property">
     <xsd:simpleContent>
       <xsd:extension base="xsd:hexBinary">
         <xsd:attribute name="type" type="ST_Guid"/>
       </xsd:extension>
     </xsd:simpleContent>
   </xsd:complexType>
   <xsd:complexType name="CT_CtxLink">
     <xsd:attribute name="direction" type="ST_Dir"/>
     <xsd:attribute name="ref" type="ST_Ref"/>
   </xsd:complexType>
   <xsd:complexType name="CT_CtxNode">
     <xsd:sequence>
       <xsd:element name="property" type="CT_Property" minOccurs="0" maxOccurs="unbounded"/>
       <xsd:element name="sourceLink" type="CT_CtxLink" minOccurs="0" maxOccurs="unbounded"/>
       <xsd:element name="destinationLink" type="CT_CtxLink" minOccurs="0" maxOccurs="unbounded"/>
     </xsd:sequence>
     <xsd:attribute name="id" type="ST_Guid" use="optional"/>
     <xsd:attribute name="type" type="ST_CtxNodeType" use="required"/>
     <xsd:attribute name="rotatedBoundingBox" type="ST_Points" use="optional"/>
     <xsd:attribute name="alignmentLevel" type="xsd:int" use="optional" default="0"/>
     <xsd:attribute name="contentType" type="xsd:int" use="optional" default="0"/>
     <xsd:attribute name="ascender" type="ST_Points" use="optional" default="0,0"/>
     <xsd:attribute name="descender" type="ST_Points" use="optional" default="0,0"/>
     <xsd:attribute name="baseline" type="ST_Points" use="optional" default="0,0"/>
     <xsd:attribute name="midline" type="ST_Points" use="optional" default="0,0"/>
     <xsd:attribute name="customRecognizerId" type="ST_Guid" use="optional"/>
     <xsd:attribute name="mathML" type="xsd:string" use="optional" default=""/>
     <xsd:attribute name="mathStruct" type="xsd:string" use="optional" default=""/>
     <xsd:attribute name="mathSymbol" type="xsd:string" use="optional" default=""/>
     <xsd:attribute name="beginModifierType" type="xsd:string" use="optional" default=""/>
     <xsd:attribute name="endModifierType" type="xsd:string" use="optional" default=""/>
     <xsd:attribute name="rotationAngle" type="xsd:int" use="optional" default="0"/>
     <xsd:attribute name="hotPoints" type="ST_Points" use="optional"/>
     <xsd:attribute name="centroid" type="ST_Point" use="optional"/>
     <xsd:attribute name="semanticType" type="ST_SemanticType" use="optional" default="none"/>
     <xsd:attribute name="shapeName" type="xsd:string" use="optional" default=""/>
     <xsd:attribute name="shapeGeometry" type="ST_Points" use="optional"/>
   </xsd:complexType>
   <xsd:element name="context" type="CT_CtxNode"/>
 </xsd:schema>