Class representing the way ReferencableElements can be referenced in VO-DML. It must be possible to refer to elements in other, imported data models as well as in the current model. Hence the VODMLREF must identify both model and element. The element is identified by the VO-DML ID in the model, the model is identified using a prefix that MUST correspond to the vodml-id element of the current or an imported model. Note, references to element sin the current model MUST also have a prefix, there is no default model! TBD We could use an xsd:QName where VODMLREF is used, but that may have somewhat more sever syntax constraints than desired.

<xsd:simpleType name="VODMLREF">

<xsd:annotation>

<xsd:documentation>

Class representing the way ReferencableElements can be referenced in VO-DML.
It must be possible to refer to elements in other, imported data models as well as in the current model.
Hence the VODMLREF must identify both model and element.
The element is identified by the VO-DML ID in the model, the model is identified using a
prefix that MUST correspond to the vodml-id element of the current or an imported model.
Note, references to element sin the current model MUST also have a prefix, there is no default model!
TBD We could use an xsd:QName where VODMLREF is used, but that may have somewhat more sever syntax constraints than desired.

</xsd:documentation>

</xsd:annotation>

<xsd:restriction base="xsd:string">

<xsd:annotation>

<xsd:documentation>

A restriction on the valid strings that make this a valid reference to a referencable element.
Consists of a prefix that should follow the ModelPrefix restriction
and a identifier that should follow the VODMLID restriction,
separated from each other by a colon.

</xsd:documentation>

<xsd:documentation>

TODO define the restriction pattern properly.
MUST be [Prefix ':' VODMLID].

</xsd:documentation>

</xsd:annotation>

<xsd:pattern value="[a-zA-Z][a-zA-Z0-9\._\-]+:[a-zA-Z][a-zA-Z0-9\._]*"/>

</xsd:restriction>

</xsd:simpleType>

This XML schema documentation has been generated with DocFlex/XML RE 1.8.0 using DocFlex/XML XSDDoc 2.2.0 template set.

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Namespace:	http://www.ivoa.net/xml/VODML/v1
Defined:	globally in vo-dml.xsd; see XML source
Used:	at 1 location