<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
  <xs:element name="DrawingSource">
    <xs:annotation>
      <xs:documentation>A drawing source is a definition that provides part of the information required to connect to a particular drawing</xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:sequence>
        <xs:element name="SourceName" type="xs:string">
          <xs:annotation>
            <xs:documentation>Specifies the source (pathname) of the drawing</xs:documentation>
          </xs:annotation>
        </xs:element>
        <xs:element name="CoordinateSpace" type="xs:string" minOccurs="0">
          <xs:annotation>
            <xs:documentation>Specifies the coordinate space that is assigned to the drawing. Default is LL84, if none specified.</xs:documentation>
          </xs:annotation>
        </xs:element>
        <xs:element name="Sheet" minOccurs="0" maxOccurs="unbounded">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="Name" type="xs:string"/>
              <xs:element name="Extent">
                <xs:complexType>
                  <xs:sequence>
                    <xs:element name="MinX" type="xs:double"/>
                    <xs:element name="MinY" type="xs:double"/>
                    <xs:element name="MaxX" type="xs:double"/>
                    <xs:element name="MaxY" type="xs:double"/>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>