005-appendices.md

VO-DML XML schema [NORMATIVE] {#sec:schema}

In order to keep the VOTable standard as stable as possible and to better separate the concerns of the different documents, the elements used for mapping data model instances are defined in a standalone schema, that is then imported by the VOTable 1.4 schema itself.

Additions to VOTable

The new VOTable 1.4 VOTable schema [@votable] simply imports the mapping schema through xs:import:

<xs:import namespace="http://www.ivoa.net/xml/VODML_Mapping/v1.0"
               schemaLocation="VODML-mapping.xsd"/>

And then defines a new element VODML as a direct child of VOTABLE (line 5):

	<!-- VOTable is the root element -->
	<xs:element name="VOTABLE">
		<xs:complexType>
			<xs:sequence>
				<xs:element name="VODML" type="vodml:VODML" minOccurs="0" />
				<xs:element name="DESCRIPTION" type="anyTEXT" minOccurs="0" />
				<xs:element name="DEFINITIONS" type="Definitions" minOccurs="0" />
				<!-- Deprecated -->
				<xs:choice minOccurs="0" maxOccurs="unbounded">
					<xs:element name="COOSYS" type="CoordinateSystem" />
					<!-- Deprecated in V1.2 -->
					<xs:element name="GROUP" type="Group" />
					<xs:element name="PARAM" type="Param" />
					<xs:element name="INFO" type="Info" minOccurs="0" maxOccurs="unbounded" />
				</xs:choice>
				<xs:element name="RESOURCE" type="Resource" minOccurs="1" maxOccurs="unbounded" />
				<xs:element name="INFO" type="Info" minOccurs="0" maxOccurs="unbounded" />
			</xs:sequence>
			<xs:attribute name="ID" type="xs:ID" />
			<xs:attribute name="version">
				<xs:simpleType>
					<xs:restriction base="xs:NMTOKEN">
						<xs:enumeration value="1.3" />
					</xs:restriction>
				</xs:simpleType>
			</xs:attribute>
		</xs:complexType>
	</xs:element>

VODML-mapping shema

file: data/VODML-mapping.xsd
classes:
 - xml
 - numberLines
 - resizable
caption: VODML additions to the VOTable schema.
id: lst:mapping

References