<!--

SVN $Id: chart.xsd 277 2011-01-07 09:01:40Z lmorandini $

  Description:
  Dictionary for XML data to be fed into the Fins components
-->
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://ipzs.it/chart" xmlns:chart="http://ipzs.it/chart">

  <!-- The root element -->
  <xsd:element name="chart">
    <xsd:complexType>
      <xsd:sequence>
        <!-- The styles -->
        <xsd:element ref="chart:styles" minOccurs="0" maxOccurs="1"/>

        <!-- The chart definition -->
        <xsd:element ref="chart:definition" minOccurs="1" maxOccurs="1"/>

        <!-- The chart data, which take many forms, with or
           without the "categories" xsd:element -->
        <xsd:choice>
          <xsd:element ref="chart:category-dataset"/>
          <xsd:element ref="chart:xy-dataset"/>
          <xsd:element ref="chart:time-dataset"/>
          <xsd:element ref="chart:meter-dataset"/>
        </xsd:choice>
      </xsd:sequence>
      <xsd:attribute name="type" type="chart:ChartType" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Chart style, these xsd:element contains fonts and colors used throughout
    the chart -->
  <xsd:element name="styles">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element ref="chart:color" minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element ref="chart:font" minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element ref="chart:gradient" minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element ref="chart:line" minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element ref="chart:shape" minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

  <!-- Color definition -->
  <xsd:element name="color">
    <xsd:complexType>
      <xsd:attribute name="id" type="xsd:ID" use="required"/>
      <xsd:attribute name="fill" type="xsd:string" use="required"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Font definition -->
  <xsd:element name="font">
    <xsd:complexType>
      <xsd:attribute name="id" type="xsd:ID" use="required"/>
      <xsd:attribute name="name" type="xsd:NMTOKEN" use="required"/>
      <xsd:attribute name="style" use="required" type="chart:FontType"/>
      <xsd:attribute name="size" type="xsd:integer" use="required"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Gradient definition -->
  <xsd:element name="gradient">
    <xsd:complexType>
      <xsd:attribute name="id" type="xsd:ID" use="required"/>
      <xsd:attribute name="start-color-style" type="xsd:NMTOKEN" use="required"/>
      <xsd:attribute name="end-color-style" type="xsd:NMTOKEN" use="required"/>
      <xsd:attribute name="orientation" use="required" type="chart:ColorGradientOrientation"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Line pattern definition -->
  <xsd:element name="line">
    <xsd:complexType>
      <xsd:attribute name="id" type="xsd:ID" use="required"/>
      <xsd:attribute name="width" type="xsd:float" use="optional"/>
      <xsd:attribute name="type" type="chart:StrokeDashType" use="optional"/>
      <xsd:attribute name="cap" type="chart:StrokeCapType" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Shape pattern definition -->
  <xsd:element name="shape">
    <xsd:complexType>
      <xsd:attribute name="id" type="xsd:ID" use="required"/>
      <xsd:attribute name="type" type="chart:Shape" use="optional"/>
      <xsd:attribute name="size" type="xsd:integer" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Chart definition, these xsd:element is supposed to remain the same
     when chart data changes, hence the separation of definition and
     dataset xsd:elements -->
  <xsd:element name="definition">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element ref="chart:properties" minOccurs="0" maxOccurs="1"/>
        <xsd:element ref="chart:frame" minOccurs="0" maxOccurs="1"/>
        <xsd:element ref="chart:background" minOccurs="0" maxOccurs="1"/>
        <xsd:element ref="chart:interval-marker" minOccurs="0" maxOccurs="1"/>
        <xsd:element ref="chart:domain-marker" minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>


  <!-- Properties of the whole chart -->
  <xsd:element name="properties">
    <xsd:complexType>
      <xsd:attribute name="locale" type="xsd:NMTOKEN" use="optional"/>
      <xsd:attribute name="mapid" type="xsd:string" use="optional"/>
      <xsd:attribute name="title" type="xsd:string" use="optional"/>
      <xsd:attribute name="style" type="chart:Style" use="optional"/>
      <xsd:attribute name="font-style" type="xsd:IDREF" use="optional"/>

      <!-- This is used to blend differen colors when superimposition happens -->
      <xsd:attribute name="alpha" type="xsd:float" use="optional"/>

      <!-- This message is shown when all values are zero -->
      <xsd:attribute name="no-data-message" type="xsd:string" use="optional"/>

      <xsd:attribute name="orientation" type="chart:Orientation" use="optional"/>
      <xsd:attribute name="stacked" type="xsd:boolean" use="optional"/>

      <!-- Thickness equal to "0" means 2D chart, other than "0" means
         a 3D chart, the number in future should be used to set how
         thick a 3D chart should be -->
      <xsd:attribute name="thickness" type="xsd:nonNegativeInteger" use="optional"/>

      <xsd:attribute name="legend" type="chart:ChartLegend" use="optional"/>
      <xsd:attribute name="show-values" type="chart:ValueFormat" use="optional"/>
      <xsd:attribute name="use-fancy-labels" type="xsd:boolean" use="optional"/>

      <!-- Margins between plot and axes expressed as fraction of range (0.1 mean 10% of range).
         It works only for XY and time series -->
      <xsd:attribute name="left-margin" type="xsd:float" use="optional"/>
      <xsd:attribute name="right-margin" type="xsd:float" use="optional"/>
      <xsd:attribute name="top-margin" type="xsd:float" use="optional"/>
      <xsd:attribute name="bottom-margin" type="xsd:float" use="optional"/>

      <!-- Works only for XY and time series -->
      <xsd:attribute name="value-labels" type="xsd:boolean" use="optional"/>

      <!--  Works only fo bar charts -->
      <xsd:attribute name="bar-shadow" type="xsd:boolean" use="optional"/>
      <xsd:attribute name="bar-style" type="chart:BarStyleType" use="optional"/>
      
      <!-- Information about axis -->
      <xsd:sequence>

        <!-- Retained for compatiblity with previous Fins versions, it can
        be used only whith a single value axis -->
        <xsd:choice>
          <!-- Use of logarithmic-scale Y Axis -->
          <xsd:attribute name="log-axis" type="xsd:boolean" use="optional"/>

          <xsd:attribute name="category-axis-label" type="xsd:string" use="optional"/>
          <xsd:attribute name="value-axis-label" type="xsd:string" use="optional"/>
          <xsd:attribute name="category-labels-orientation" type="chart:Orientation" use="optional"/>
          <xsd:attribute name="value-labels-orientation" type="chart:Orientation" use="optional"/>
          <xsd:attribute name="min-value" type="xsd:double" use="optional"/>
          <xsd:attribute name="max-value" type="xsd:double" use="optional"/>

        </xsd:choice>

        <!-- This can be used with one or more value axis -->
        <xsd:choice>

          <xsd:element name="axes">

            <!-- Properties of a single axis -->
            <xsd:element name="axis">
              <xsd:complexType>
                <xsd:attribute name="id" type="xsd:ID" use="required"/>
                
                <!-- Type of axis -->
                <xsd:attribute name="type" type="chart:AxisType" use="required"/>

                <!-- Use of logarithmic-scale Y Axis -->
                <xsd:attribute name="log" type="xsd:boolean" use="optional"/>

                <!-- If false, it does not show the axis -->
                <xsd:attribute name="show" type="xsd:boolean" use="optional"/>

                <xsd:attribute name="location" type="chart:AxisLocation" use="optional"/>
                <xsd:attribute name="label" type="xsd:string" use="optional"/>
                <xsd:attribute name="min-value" type="xsd:double" use="optional"/>
                <xsd:attribute name="max-value" type="xsd:double" use="optional"/>

              </xsd:complexType>
            </xsd:element>
          </xsd:element>

        </xsd:choice>
      </xsd:sequence>

    </xsd:complexType>
  </xsd:element>

  <!-- Properties of the frame (the rectangle surrounding the chart proper) -->
  <xsd:element name="frame">
    <xsd:complexType>

      <!-- These xsd:attributes are expressed in pixel units -->
      <xsd:attribute name="height" type="xsd:nonNegativeInteger" use="optional"/>
      <xsd:attribute name="width" type="xsd:nonNegativeInteger" use="optional"/>

      <!-- These xsd:attributes are expressed in percentage -->
      <xsd:attribute name="margin" type="xsd:nonNegativeInteger" use="optional"/>
      <xsd:attribute name="left-margin" type="xsd:nonNegativeInteger" use="optional"/>
      <xsd:attribute name="right-margin" type="xsd:nonNegativeInteger" use="optional"/>
      <xsd:attribute name="top-margin" type="xsd:nonNegativeInteger" use="optional"/>
      <xsd:attribute name="bottom-margin" type="xsd:nonNegativeInteger" use="optional"/>
      <xsd:attribute name="color-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="gradient-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="drawborder" type="xsd:boolean" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Definition of the plot background properties
       (you can choose between an image (on the file system or an URL)
       or a color (full or gradient)) -->
  <xsd:element name="background">
    <xsd:complexType>
      <xsd:attribute name="image" type="xsd:string" use="optional"/>
      <xsd:attribute name="alignment" type="chart:Alignment" use="optional"/>
      <xsd:attribute name="color-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="gradient-style" type="xsd:IDREF" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Definition of the interval marker properties
    (a way to highlight a sub-set of values) -->
  <xsd:element name="interval-marker">
    <xsd:annotation>
      <xsd:documentation>
        The label attribute dictates whether the label of the interval marker
        has to be drawn or not; if yes, the label-text attribute content is written
        over the interval marker (in case the label-text attribute is missing, 
        the min and max values are written instead). If label attribute is missing
        then the label is not written.
      </xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
      <xsd:attribute name="label" type="xsd:boolean" use="optional"/>
      <xsd:attribute name="label-text" type="xsd:string" use="optional"/>
      <xsd:attribute name="color-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="min-value" type="xsd:double" use="required"/>
      <xsd:attribute name="max-value" type="xsd:double" use="required"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Definition of the domain marker properties
    (a way to highlight a sub-domain of domain values) -->
  <xsd:element name="domain-marker">
    <xsd:annotation>
      <xsd:documentation>
        If existing, the label-text attribute content is written
        over the domain marker (in case the label-text attribute is missing, 
        the min and max values are written instead); the label-offset specifies
        a series of 4 offsets expressed in font size to box the label in 
        (top, left). The opacity values goes from 0 (totally transparent)
        to 1 (totally opaque)
        The domain value may be defined in three differen manners: 
        - Single value (domain attribute)
        - Single time (time-domain attribute)
        - Value interval (min-domain and max-domain attribute)
        - Time interval (min-time-domain and max-time-domain attribute)
        - Category (category attribute, which refers to a category ID)
      </xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
      <xsd:attribute name="label-text" type="xsd:string" use="optional"/>
      <xsd:attribute name="color-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="line-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="outline-color-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="outline-line-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="font-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="font-color-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="opacity" type="xsd:double" use="optional"/>
      <xsd:attribute name="label-offset" type="xsd:string" use="optional"/>
      <xsd:sequence>
        <xsd:choice>
          <xsd:attribute name="category" type="xsd:IDREF"/>
        </xsd:choice>
        <xsd:choice>
          <xsd:attribute name="domain" type="xsd:double"/>
        </xsd:choice>
        <xsd:choice>
          <xsd:attribute name="time-domain" type="xsd:string"/>
          <!-- Date pattern for Time series (see class java.text.SimpleDateFormat on format string) -->
          <xsd:attribute name="date-pattern" type="xsd:string" use="optional"/>
        </xsd:choice>
        <xsd:choice>
          <xsd:attribute name="min-domain" type="xsd:double" use="required"/>
          <xsd:attribute name="max-domain" type="xsd:double" use="required"/>
        </xsd:choice>
        <xsd:choice>
          <xsd:attribute name="min-time-domain" type="xsd:string" use="required"/>
          <xsd:attribute name="max-time-domain" type="xsd:string" use="required"/>
          <!-- Date pattern for Time series (see class java.text.SimpleDateFormat on format string) -->
          <xsd:attribute name="date-pattern" type="xsd:string" use="optional"/>
        </xsd:choice>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>
  
  <!-- Definition of series, only IDs are defined, -->
  <xsd:element name="seriesdefinition">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element ref="chart:series" minOccurs="1" maxOccurs="unbounded"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

  <!-- Single series definition
    IDs are case-sensitive -->
  <xsd:element name="series">
    <xsd:complexType>
      <xsd:attribute name="id" type="xsd:ID" use="required"/>
      <xsd:attribute name="axis" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="title" type="xsd:string" use="optional"/>
      <xsd:attribute name="color-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="line-style" type="xsd:IDREF" use="optional"/>
      <xsd:attribute name="shape-style" type="xsd:IDREF" use="optional"/>

      <!-- This atributes are needed only by Line, Area, Shape-and-line charts -->
      <!--      <xsd:attribute name="stroke-width" type="xsd:float" use="optional"/>
      <xsd:attribute name="stroke-type" type="chart:StrokeDashType" use="optional"/>
      <xsd:attribute name="stroke-cap" type="chart:StrokeCapType" use="optional"/>
-->
      <!-- This xsd:attribute is needed only by time charts -->
      <!-- Time interval of the series -->
      <xsd:attribute name="frequency" type="chart:Frequency" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Dataset used for category charts /pie, bar, ...) -->
  <xsd:element name="category-dataset">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element ref="chart:seriesdefinition" minOccurs="1" maxOccurs="1"/>
        <xsd:element ref="chart:categories" minOccurs="1" maxOccurs="1"/>
        <xsd:element ref="chart:seriesdata" minOccurs="1" maxOccurs="1"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

  <!-- Dataset used for XY charts -->
  <xsd:element name="xy-dataset">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element ref="chart:seriesdefinition" minOccurs="1" maxOccurs="1"/>
        <xsd:element ref="chart:seriesdata" minOccurs="1" maxOccurs="1"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

  <!-- Dataset used for time series -->
  <xsd:element name="time-dataset">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element ref="chart:seriesdefinition" minOccurs="1" maxOccurs="1"/>
        <xsd:element ref="chart:seriesdata" minOccurs="1" maxOccurs="1"/>
      </xsd:sequence>

      <!-- Time-period of the chart (e.g. 3d (=3 Days), 1m (=1 Month), 2y (=2 Years)) -->
      <xsd:attribute name="period" type="xsd:string" use="optional"/>

      <!-- Date pattern for Time series (see class java.text.SimpleDateFormat on format string) -->
      <xsd:attribute name="date-pattern" type="xsd:string" use="optional"/>

      <!-- Date pattern for Time series domain axis labels (see class java.text.SimpleDateFormat on format string) -->
      <xsd:attribute name="label-pattern" type="xsd:string" use="optional"/>

      <!-- Calculate the Moving Average of the series (value expressed in number of periods).
        Either if not set or set to 0 the moving-average is not displayed. -->
      <xsd:attribute name="moving-average" type="xsd:integer" use="optional"/>

      <!-- Suffix to be appended at the name of the generated moving-average series. -->
      <xsd:attribute name="moving-average-suffix" type="xsd:string" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Dataset used for meter charts -->
  <xsd:element name="meter-dataset">
    <xsd:complexType>
      <!-- the lower bound for the overall range. -->
      <xsd:attribute name="min" type="xsd:double" use="required"/>
      <!-- the upper bound for the overall range -->
      <xsd:attribute name="max" type="xsd:double" use="required"/>
      <!-- the current value -->
      <xsd:attribute name="value" type="xsd:double" use="required"/>
      <!-- the unit description. -->
      <xsd:attribute name="units" type="xsd:string" use="optional"/>
      <!-- the minimum critical value. -->
      <xsd:attribute name="min-critical" type="xsd:double" use="optional"/>
      <!--  the maximum critical value. -->
      <xsd:attribute name="max-critical" type="xsd:double" use="optional"/>
      <!-- the minimum warning value. -->
      <xsd:attribute name="min-warning" type="xsd:double" use="optional"/>
      <!-- the maximum warning value. -->
      <xsd:attribute name="max-warning" type="xsd:double" use="optional"/>
      <!-- the minimum normal value. -->
      <xsd:attribute name="min-normal" type="xsd:double" use="optional"/>
      <!-- the maximum normal value. -->
      <xsd:attribute name="max-normal" type="xsd:double" use="optional"/>
      <!-- the border type. -->
      <xsd:attribute name="border-type" type="xsd:double" use="optional"/>
      <!-- The needle color -->
      <xsd:attribute name="needle-color-style" type="xsd:IDREF" use="optional"/>
      <!-- The legend Title (if displayed) -->
      <xsd:attribute name="legend-title" type="xsd:string" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Categories definition -->
  <xsd:element name="categories">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element ref="chart:category" minOccurs="1" maxOccurs="unbounded"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

  <!-- Category definition.
    IDs are case-sensitive -->
  <xsd:element name="category">
    <xsd:complexType>
      <xsd:attribute name="id" type="xsd:ID" use="required"/>
      <xsd:attribute name="label" type="xsd:string" use="optional"/>
      <xsd:attribute name="color-style" type="xsd:IDREF" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Actual data, ordered by series -->
  <xsd:element name="seriesdata">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element ref="chart:seriesgroup" minOccurs="1" maxOccurs="unbounded"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

  <!-- Series data take different forms depending on the chart type -->
  <xsd:element name="seriesgroup">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:choice>
          <xsd:element ref="chart:category-item" minOccurs="0" maxOccurs="unbounded"/>
          <xsd:element ref="chart:xy-item" minOccurs="0" maxOccurs="unbounded"/>
          <xsd:element ref="chart:time-item" minOccurs="0" maxOccurs="unbounded"/>
        </xsd:choice>
      </xsd:sequence>

      <!-- Series ID (they must have been defined -->
      <xsd:attribute name="series" type="xsd:IDREF" use="required"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Single data item for category data, containing the id of the category
     it belongs to, and the value to be shown on chart -->
  <xsd:element name="category-item">
    <xsd:complexType>
      <xsd:attribute name="category" type="xsd:IDREF" use="required"/>
      <xsd:attribute name="value" type="xsd:float" use="required"/>
      <xsd:attribute name="label" type="xsd:string" use="optional"/>
      <xsd:attribute name="url" type="xsd:string" use="optional"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Single data item for xy charts data -->
  <xsd:element name="xy-item">
    <xsd:complexType>
      <xsd:attribute name="x" type="xsd:float" use="required"/>
      <xsd:attribute name="y" type="xsd:float" use="required"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Single data item for time series charts data -->
  <xsd:element name="time-item">
    <xsd:complexType>
      <xsd:attribute name="time" type="xsd:string" use="required"/>
      <xsd:attribute name="value" type="xsd:float" use="required"/>
    </xsd:complexType>
  </xsd:element>

  <!-- Type defining the chart type -->
  <xsd:simpleType name="ChartType">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="category"/>
      <xsd:enumeration value="pie"/>
      <xsd:enumeration value="time"/>
      <xsd:enumeration value="xyseries"/>
      <xsd:enumeration value="meter"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Type defining the bar chart style -->
  <xsd:simpleType name="BarStyleType">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="flat"/>
      <xsd:enumeration value="brilliant"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Type defining the orientation -->
  <xsd:simpleType name="Orientation">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="vertical"/>
      <xsd:enumeration value="horizontal"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Type defining the chart legend setting -->
  <xsd:simpleType name="ChartLegend">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="no"/>
      <xsd:enumeration value="south"/>
      <xsd:enumeration value="north"/>
      <xsd:enumeration value="east"/>
      <xsd:enumeration value="west"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Type defining the style of a line -->
  <xsd:simpleType name="StrokeDashType">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="stroke-dash"/>
      <xsd:enumeration value="short-dash"/>
      <xsd:enumeration value="long-dash"/>
      <xsd:enumeration value="mixed-dash"/>
      <xsd:enumeration value="continuous"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Type defining the style of line's end -->
  <xsd:simpleType name="StrokeCapType">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="round"/>
      <xsd:enumeration value="square"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Type defining the interval in a time-based charts -->
  <xsd:simpleType name="Frequency">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="hour"/>
      <xsd:enumeration value="day"/>
      <xsd:enumeration value="week"/>
      <xsd:enumeration value="month"/>
      <xsd:enumeration value="year"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Type defining the renderer style -->
  <xsd:simpleType name="Style">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="area"/>
      <xsd:enumeration value="area-and-shape"/>
      <xsd:enumeration value="bar"/>
      <xsd:enumeration value="line"/>
      <xsd:enumeration value="shape"/>
      <xsd:enumeration value="shape-and-line"/>
      <xsd:enumeration value="step"/>
      <xsd:enumeration value="dialtype-chord"/>
      <!-- only for meter charts -->
      <xsd:enumeration value="dialtype-circle"/>
      <!-- only for meter charts -->
      <xsd:enumeration value="dialtype-pie"/>
      <!-- only for meter charts -->
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Type defining the color gradient orientation -->
  <xsd:simpleType name="ColorGradientOrientation">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="vertical"/>
      <xsd:enumeration value="horizontal"/>
      <xsd:enumeration value="vertical-centered"/>
      <xsd:enumeration value="horizontal-centered"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Alignment types -->
  <xsd:simpleType name="Alignment">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="fit"/>
      <xsd:enumeration value="center"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Value format definitions (only for PIE and CATEGORY charts -->
  <xsd:simpleType name="ValueFormat">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="none"/>
      <xsd:enumeration value="name"/>
      <xsd:enumeration value="percent"/>
      <xsd:enumeration value="value"/>
      <xsd:enumeration value="name-value"/>
      <xsd:enumeration value="name-percent"/>
      <xsd:enumeration value="value-percent"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Font type -->
  <xsd:simpleType name="FontType">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="plain"/>
      <xsd:enumeration value="bold"/>
      <xsd:enumeration value="italic"/>
    </xsd:restriction>
  </xsd:simpleType>
  
  <!-- Shape types -->
  <xsd:simpleType name="Shape">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="circle"/>
      <xsd:enumeration value="square"/>
    </xsd:restriction>
  </xsd:simpleType>

  <!-- Type defining the location of an axis in the plot -->
  <xsd:simpleType name="AxisLocation">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="top-or-left"/>
      <xsd:enumeration value="bottom-or-left"/>
      <xsd:enumeration value="top-or-right"/>
      <xsd:enumeration value="bottom-or-right"/>
    </xsd:restriction>
  </xsd:simpleType>
  
  <!-- Axis type -->
  <xsd:simpleType name="AxisType">
    <xsd:restriction base="xsd:token">
      <xsd:enumeration value="category"/>
      <xsd:enumeration value="value"/>
    </xsd:restriction>
  </xsd:simpleType>
  
</xsd:schema>