<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           elementFormDefault="qualified">

 <xs:element name='Parameters'>
  <xs:complexType>
	  <!--Is the time management plugin.-->
   <xs:attribute name='REMINDUSERAT' type='xs:integer' use='optional'/>
  </xs:complexType>
 </xs:element>

 <!--Used for node notes.-->
 <xs:element name='text'>
  <xs:complexType/>
 </xs:element>

 <!-- BEGIN ATTRIBUTES -->
<xs:element name='attribute_value'>
<xs:complexType>
<xs:attribute name='VALUE' type='xs:string' use='required'/>
</xs:complexType>
</xs:element>
<xs:element name='attribute_name'>
<xs:complexType>
<xs:choice minOccurs='0' maxOccurs='unbounded'>
<xs:element ref='attribute_value'/>
</xs:choice>
<xs:attribute name='NAME' type='xs:string' use='required'/>
<xs:attribute name='MANUAL' type='xs:boolean' use='optional' />
<xs:attribute name='RESTRICTED' type='xs:boolean' use='optional' />
<xs:attribute name='VISIBLE' type='xs:boolean' use='optional' />
</xs:complexType>
</xs:element>
<xs:element name='attribute_registry'>
<xs:complexType>
<xs:choice minOccurs='0' maxOccurs='unbounded'>
<xs:element ref='attribute_name'/>
</xs:choice>
<xs:attribute name='RESTRICTED' type='xs:boolean' use='optional' />
<xs:attribute name='SHOW_ATTRIBUTES' use='optional'>
<xs:simpleType>
<xs:restriction base='xs:string'>
<xs:enumeration value='selected'/>
<xs:enumeration value='hide'/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:complexType>
</xs:element>
<xs:element name='attribute_layout'>
<xs:complexType>
<xs:attribute name='NAME_WIDTH'  type='xs:integer' use='optional'/>
<xs:attribute name='VALUE_WIDTH' type='xs:integer' use='optional'/>
</xs:complexType>
</xs:element>
<xs:element name='attribute'>
<xs:complexType>
<xs:attribute name='NAME'  type='xs:string' use='required'/>
<xs:attribute name='VALUE' type='xs:string' use='required'/>
</xs:complexType>
</xs:element>
<!-- END ATTRIBUTES -->

<map:attributes attribute:restricted="false|true">
 <attribute:attribute meta:name="..."
                      attribute:restricted="false|true"
                      attribute:selected="false|true">
  <attribute:value>some value</attribute:value>
  ...
 </attribute:attribute>
 ...
</map:attributes>

And then assign the attributes at the node level:

<node:attributes attribute:name-width="..."
                 attribute:value-width="...">
 <attribute:attribute
           meta:name="...">some value</attribute:attribute>
 ...
</node:attributes>

 <xs:element name='arrowlink'>
  <xs:complexType>
   <xs:attribute name='COLOR' type='xs:string' use='optional'/>
   <xs:attribute name='DESTINATION' type='xs:string' use='required'/>
   <xs:attribute name='ENDARROW' type='xs:string' use='optional'/>
   <xs:attribute name='ENDINCLINATION' type='xs:string' use='optional'/>
   <xs:attribute name='ID' type='xs:string' use='optional'/>
   <xs:attribute name='STARTARROW' type='xs:string' use='optional'/>
   <xs:attribute name='STARTINCLINATION' type='xs:string' use='optional'/>
   <xs:attribute name='SOURCE_LABEL' type='xs:string' use='optional'/>
   <xs:attribute name='MIDDLE_LABEL' type='xs:string' use='optional'/>
   <xs:attribute name='TARGET_LABEL' type='xs:string' use='optional'/>
   <xs:attribute name='EDGE_LIKE' type='xs:boolean' use='optional'/>
  </xs:complexType>
 </xs:element>

draw:start-shape="ID"
draw:color="#rrggbb"
draw:end-shape="ID"
map:start-arrow="true|false"
map:end-arrow="true|false"
xml:id="ID"
map:start-inclination="int;int;"
map:end-inclination="int;int;"
draw:style="normal|edge-like"

And with possible sub-nodes:

<map:start-label>...</map:start-label>
<svg:title>...</svg:title> (or svg:desc?!)
<map:end-label>...</map:end-label>

 <xs:element name='cloud'>
  <xs:complexType>
   <xs:attribute name='COLOR' type='xs:string' use='optional'/>
   <xs:attribute name='WIDTH' type='xs:integer' use='optional'/>
  </xs:complexType>
 </xs:element>

draw:color="#rrggbb"

(WIDTH parameter isn't used currently and is always 0)

 <xs:element name='edge'>
  <xs:complexType>
   <xs:attribute name='COLOR' type='xs:string' use='optional'/>
   <xs:attribute name='STYLE' type='xs:string' use='optional'/>
   <xs:attribute name='WIDTH' type='xs:string' use='optional'/>
  </xs:complexType>
 </xs:element>

draw:color="#rrggbb"
draw:style="linear|sharp-linear|bezier|sharp-bezier|horizontal"
draw:stroke="solid|none"
svg:stroke-width="length" (Freeplane uses only integers)

Note

those attributes should be moved to a <style:style> element that defines a style with the family value of graphic, and referenced by name through the draw:style-name attribute.

 <xs:element name='font'>
  <xs:complexType>
   <xs:attribute name='BOLD' use='optional'>
    <xs:simpleType>
     <xs:restriction base='xs:string'>
      <xs:enumeration value='true'/>
      <xs:enumeration value='false'/>
     </xs:restriction>
    </xs:simpleType>
   </xs:attribute>
   <xs:attribute name='ITALIC' use='optional'>
    <xs:simpleType>
     <xs:restriction base='xs:string'>
      <xs:enumeration value='true'/>
      <xs:enumeration value='false'/>
     </xs:restriction>
    </xs:simpleType>
   </xs:attribute>
   <xs:attribute name='NAME' type='xs:string' use='optional'/>
   <xs:attribute name='SIZE' type='xs:integer' use='optional'/>
  </xs:complexType>
 </xs:element>

fo:color="#rrggbb"
fo:font-weight="normal|bold"
fo:font-style="normal|italic"
fo:font-family="name of the font"
fo:font-size="integer"

Note

<style:font-name> could be used instead of fo:font-family but, according to specs, this would mean a separate definition of a font through a style:font-face element and that makes the whole thing more complex. See Freeplane_File_Format#3.14_.3Coffice:font-face-decls.3E.

Note

this element should be moved to a <style:style> element that defines a style with the family value of text, and referenced by name through the text:style-name attribute.

 <xs:element name='hook'>
  <xs:complexType>
   <xs:sequence>
    <xs:element ref='Parameters' minOccurs='0' maxOccurs='1'/>
    <xs:element ref='text' minOccurs='0' maxOccurs='1'/>
   </xs:sequence>
   <xs:attribute name='NAME' type='xs:string' use='required'/>
   <!-- for embedded images NAME="ExternalObject" -->
   <xs:attribute name='URI'  type='xs:anyURI' use='optional'/>
   <xs:attribute name='SIZE' type='xs:decimal' use='optional'/>

<draw:frame draw:transform="scale(sx [sy])">
 <draw:image xlink:href="URL"/>
</draw:frame>

Note

if wished, the <draw:image> element could also have an attribute draw:filter-name="ExternalObject" but I wouldn't see the point (rather the name of a plugin for image formats not supported by Freeplane).

   <!-- for map config info NAME="MapStyle" -->
   <xs:attribute name='max_node_width'  type='xs:integer' use='optional'/>
   <xs:attribute name='zoom' type='xs:decimal' use='optional'/>

In the first case, they would be attributes to the <map:map> element:

node:max-width="integer"
map:zoom="percentage"

And in the 2nd case, they would be office settings:

<config:config-item config:name="NodeMaxWidth"
                    config:type="int">40</config:config-item>
<config:config-item config:name="MapZoom"
                    config:type="int">150</config:config-item>

TBD

   <!-- for equations NAME="plugins/latex/LatexNodeHook.properties" -->
   <xs:attribute name='EQUATION' type='xs:string' use='optional'/>
  </xs:complexType>
 </xs:element>

<node:content 
      xmlns:latex="plugins/latex/LatexNodeHook.properties">
 <latex:equation>
  <![CDATA[some equation in Latex]]>
 </latex:equation>
</node:content>

As shown here, in the case of non-XML dialect, the use of a CDATA section is highly recommended.

 <xs:element name='icon'>
  <xs:complexType>
   <xs:attribute name='BUILTIN' type='xs:string' use='required'/>
  </xs:complexType>
 </xs:element>

node:icon-name="..." (a string)

 <xs:element name='html'>
  <xs:complexType>
   <xs:sequence>
    <!--Anything that is valid XML,
                 but should be http://www.w3.org/1999/xhtml -->
    <xs:any namespace="##any" minOccurs="0" maxOccurs="unbounded"
            processContents="skip"/>
   </xs:sequence>
  </xs:complexType>
 </xs:element>

 <xs:element name='richcontent'>
  <xs:complexType>
   <!-- And contains XHTML as unique child:-->
   <xs:sequence>
    <xs:element ref='html' minOccurs='1' maxOccurs='1'/>
   </xs:sequence>
   <!--Currently, only NODE or NOTE is allowed.-->
   <xs:attribute name='TYPE' use='required'>
    <xs:simpleType>
     <xs:restriction base='xs:string'>
      <xs:enumeration value='NODE'/>
      <xs:enumeration value='NOTE'/>
     </xs:restriction>
    </xs:simpleType>
   </xs:attribute>
  </xs:complexType>
 </xs:element>

<node:content xmlns:xhtml="http://www.w3.org/1999/xhtml">
 <xhtml:body> ... </xhtml:body>

or

<office:annotation xmlns:xhtml="http://www.w3.org/1999/xhtml">
 <xhtml:body> ... </xhtml:body>

Note:the XHTML body is specific to Freeplane, ODF has actually its own markup, but that would be too much to implement. In the future, other type of elements could be implemented in a node or a note (Latex, etc...) instead of XHTML.

 <xs:element name='map'>
  <xs:complexType>
   <xs:sequence>
    <xs:element ref='attribute_registry' minOccurs='0' maxOccurs='1'/>
    <xs:element ref='node' minOccurs='1' maxOccurs='1' />
   </xs:sequence>
   <xs:attribute name='version' type='xs:string' use='required'/>
  </xs:complexType>
 </xs:element>

 <xs:element name='node'>

  <xs:complexType>
   <xs:choice minOccurs='0' maxOccurs='unbounded'>
    <xs:element ref='arrowlink'/>
    <xs:element ref='cloud'/>
    <xs:element ref='edge'/>
    <xs:element ref='font'/>
    <xs:element ref='hook'/>
    <xs:element ref='icon'/>
    <xs:element ref='node'/>
    <!-- For nodes with extended formatting content or for notes. -->
    <xs:element ref='richcontent'/>
    <xs:element ref='attribute_layout'/>
    <xs:element ref='attribute'/>
   </xs:choice>

   <xs:attribute name='BACKGROUND_COLOR'
                 type='xs:string' use='optional'/>

   <xs:attribute name='COLOR' type='xs:string' use='optional'/>

   <xs:attribute name='FOLDED' use='optional'>
    <xs:simpleType>
     <xs:restriction base='xs:string'>
      <xs:enumeration value='true'/>
      <xs:enumeration value='false'/>
     </xs:restriction>
    </xs:simpleType>
   </xs:attribute>

   <xs:attribute name='ID' type='xs:ID' use='optional'/>

   <xs:attribute name='LINK' type='xs:string' use='optional'/>

   <xs:attribute name='POSITION' use='optional'>
    <xs:simpleType>
     <xs:restriction base='xs:string'>
      <xs:enumeration value='left'/>
      <xs:enumeration value='right'/>
     </xs:restriction>
    </xs:simpleType>
   </xs:attribute>

   <xs:attribute name='STYLE' type='xs:string' use='optional'/>

   <xs:attribute name='TEXT' type='xs:string' use='optional'/>

   <xs:attribute name='CREATED' type='xs:integer' use='optional'/>
   <xs:attribute name='MODIFIED' type='xs:integer' use='optional'/>

Note

the 'dateTime' format is normally according to ISO8601 instead of the current UN*X-like number of seconds. TBD - To Be Discussed.

   <xs:attribute name='HGAP' type='xs:integer' use='optional'/>
   <xs:attribute name='VGAP' type='xs:integer' use='optional'/>
   <xs:attribute name='VSHIFT' type='xs:integer' use='optional'/>

   <xs:attribute name='ENCRYPTED_CONTENT'
                 type='xs:string' use='optional'/>

  </xs:complexType>
 </xs:element>
</xs:schema>