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<?xml version="1.0" encoding="UTF-8"?>

<!--
Load image data from a PGM file and represent the data as a sequence of pixels in row major order.
-->

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:dfdl="http://www.ogf.org/dfdl/dfdl-1.0/" xmlns:ex="http://example.com" targetNamespace="http://example.com">
  <xs:include schemaLocation="xsd/built-in-formats.xsd"/>

  <xs:annotation>
    <xs:appinfo source="http://www.ogf.org/dfdl/">
      <dfdl:format ref="ex:daffodilTest1" separator="" initiator="" terminator="" leadingSkip='0' textTrimKind="none" initiatedContent="no"
        alignment="implicit" alignmentUnits="bits" trailingSkip="0" ignoreCase="no" separatorPolicy="suppressed" 
        separatorPosition="infix" occursCountKind="parsed" emptyValueDelimiterPolicy="both" representation="text" 
        textNumberRep="standard" lengthKind="delimited" encoding="ASCII"/>
    </xs:appinfo>
  </xs:annotation>

  <xs:element name="file">
    <xs:complexType>
      <xs:sequence>

        <xs:element name="header" dfdl:lengthKind="implicit" maxOccurs="1">
          <xs:complexType>
            <xs:sequence dfdl:sequenceKind="ordered" dfdl:separator="%NL;" dfdl:separatorPosition="postfix">
              <xs:element name="type" type="xs:string"/>
              <xs:element name="dimensions" maxOccurs="1" dfdl:occursCountKind="implicit">
                <xs:complexType>
                  <xs:sequence dfdl:sequenceKind="ordered" dfdl:separator="%SP;">
                    <xs:element name="width" type="xs:integer"/>
                    <xs:element name="height" type="xs:integer"/>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
              <xs:element name="depth" type="xs:integer"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>

        <xs:element name="pixels" dfdl:lengthKind="implicit" maxOccurs="1">
          <xs:complexType>
            <xs:sequence dfdl:separator="%SP; %NL; %SP;%NL;" dfdl:separatorPosition="postfix" dfdl:separatorSuppressionPolicy="anyEmpty">
              <xs:element name="pixel" type="xs:integer" maxOccurs="unbounded" dfdl:occursCountKind="expression"
                dfdl:occursCount="{../../ex:header/ex:dimensions/ex:width * ../../ex:header/ex:dimensions/ex:height }"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>

      </xs:sequence>
    </xs:complexType>
  </xs:element>

</xs:schema>