<xsd:element name="spectrumData" id="el.spectrumData">
    <xsd:annotation>
        <xsd:documentation>
            <h:div class="summary" xmlns:h="http://www.w3.org/1999/xhtml">Data for the spectrum.</h:div>
            <h:div class="description" xmlns:h="http://www.w3.org/1999/xhtml">This is primarily to record the data in interchangeable format and machine and manufacturers settings and can include other MLs in this area (AniML, SpectroML, etc.). We recommend ASCII representations of data and this is the only format that CMLSpect implementers have to support, but we also allow for the carriage of JCAMP and other data (in ML wrappers such as AniML). All numeric data should carry units and dictionary references if possible to allow for semantic interoperability.</h:div>
            <h:div class="example" href="spectrumData1.xml" xmlns:h="http://www.w3.org/1999/xhtml" />
        </xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:sequence>
            <xsd:sequence minOccurs="0" maxOccurs="1">
                <xsd:element ref="xaxis">
                    <xsd:annotation>
                        <xsd:documentation>
                            <h:div xmlns:h="http://www.w3.org/1999/xhtml">The x-axis/es, usually including the list of points at which data are recorded. Mandatory if y-axis data are given.  Multiple x-axes are initially reserved for multiple scales rather than different measurements (for which an additional spectrum should be used).</h:div>
                        </xsd:documentation>
                    </xsd:annotation>
                </xsd:element>
                <xsd:element ref="yaxis" maxOccurs="unbounded">
                    <xsd:annotation>
                        <xsd:documentation>
                            <h:div xmlns:h="http://www.w3.org/1999/xhtml">The y-axis/es, usually including the list of points at which data are recorded. Mandatory if x-axis data are given. Multiple y-axes are initially reserved for multiple scales rather than different measurements (for which an additional spectrum should be used).</h:div>
                        </xsd:documentation>
                    </xsd:annotation>
                </xsd:element>
            </xsd:sequence>
        </xsd:sequence>
        <xsd:attributeGroup ref="dictRef" />
        <xsd:attributeGroup ref="convention" />
        <xsd:attributeGroup ref="title" />
        <xsd:attributeGroup ref="id" />
        <xsd:attributeGroup ref="ref" />
    </xsd:complexType>
</xsd:element>