<xsd:element name="eigen" id="el.eigen">
    <xsd:annotation>
        <xsd:documentation>
            <h:div class="summary" xmlns:h="http://www.w3.org/1999/xhtml">An element to hold eigenstuff.</h:div>
            <h:div class="description" xmlns:h="http://www.w3.org/1999/xhtml">Holds an array of eigenvalues and a matrix of eigenvectors.</h:div>
            <h:div class="example" href="eigen1.xml" xmlns:h="http://www.w3.org/1999/xhtml" />
        </xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:sequence>
            <xsd:element ref="array" minOccurs="0" />
            <xsd:element ref="matrix" minOccurs="0" />
        </xsd:sequence>
        <xsd:attributeGroup ref="units" />
        <xsd:attributeGroup ref="title" />
        <xsd:attributeGroup ref="id" />
        <xsd:attributeGroup ref="convention" />
        <xsd:attributeGroup ref="dictRef" />
        <xsd:attributeGroup ref="type">
            <xsd:annotation>
                <xsd:documentation>
                    <h:div class="summary" xmlns:h="http://www.w3.org/1999/xhtml">No current semantics.</h:div>
                    <h:div class="description" xmlns:h="http://www.w3.org/1999/xhtml">Suggest it is developed
                    for the chemical/physical role, e.g. "molecular obitals", "inertial
                    matrix", "vibrational modes", "phonons", etc.</h:div>
                </xsd:documentation>
            </xsd:annotation>
        </xsd:attributeGroup>
        <xsd:attributeGroup ref="eigenOrientation" />
    </xsd:complexType>
</xsd:element>