Namespace:	http://www.ivoa.net/xml/VODML/v1.0
Content:	complex, 1 attribute, 3 elements
Abstract:	(cannot be assigned directly to elements used in instance XML documents)
Defined:	globally in vo-dml-v1.0.xsd; see XML source
Includes:	definitions of 1 attribute, 3 elements
Used:	at 4 locations

XML Representation Summary
<...
	id	=	xs:string
	>
	Content:  vodml-id, name, description?
</...>

• In derivations of other global types (4):

  EnumLiteral (as extension base), Package (as extension base),

  Role (as extension base), Type (as extension base)

This is the base type for all types whose elements can be explicitly referenced. To this end it has a 'vodml-id' element of type VODMLID that allows explicit and unique identification of these elements within the context of the model. Generally these are also elements that can be represented explicitly in alternative serialisations of a data model, such as a VOTable or a relational model. These should use the value of the utype element to "point into a data model" and identify a model element. VO-DML itself also has needs of pointing to other elements, sometimes in another model. The VODMLREF type is used for such references, which will always be named 'vodml-ref'.

<xsd:complexType abstract="true" name="ReferableElement"> <xsd:annotation> <xsd:documentation> This is the base type for all types whose elements can be explicitly referenced. To this end it has a 'vodml-id' element of type VODMLID that allows explicit and unique identification of these elements within the context of the model. Generally these are also elements that can be represented explicitly in alternative serialisations of a data model, such as a VOTable or a relational model. These should use the value of the utype element to "point into a data model" and identify a model element. VO-DML itself also has needs of pointing to other elements, sometimes in another model. The VODMLREF type is used for such references, which will always be named 'vodml-ref'. </xsd:documentation> </xsd:annotation> <xsd:sequence> <xsd:element minOccurs="1" name="vodml-id" type="VODMLID"> <xsd:annotation> <xsd:documentation> Identifier for its containing element. Extracted as a separate type so that we can easily adapt to a different identifier design. </xsd:documentation> </xsd:annotation> </xsd:element> <xsd:element minOccurs="1" name="name" type="VODMLName"> <xsd:annotation> <xsd:documentation> The name of the model element. MUST NOT be an empty string. </xsd:documentation> </xsd:annotation> </xsd:element> <xsd:element minOccurs="0" name="description" type="xsd:string"> <xsd:annotation> <xsd:documentation> Human readable description of the model element. </xsd:documentation> </xsd:annotation> </xsd:element> </xsd:sequence> <xsd:attribute name="id" type="xsd:string" use="optional"> <xsd:annotation> <xsd:documentation> A referencable element may be given an @id attribute to reflect an identifier defined in some source document form which a VO-DML model may have been derived. </xsd:documentation> </xsd:annotation> </xsd:attribute> </xsd:complexType>

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