¶ dx:relativeUncertaintyType
Relative uncertainty, as required by GUM norms, cannot be implemented directly in the SI framework. Therefore, a workaround must be applied within the DX. The relative measurement uncertainty information has to be entered in the type dx:quantityType. This entry requires that the absolute measurement uncertainty information including the k-value and the coverage probability (optionally also the distribution function) has been entered in the corresponding element si:real or si:realListXMLList and its corresponding child elements.
¶ Tree structure
The tree structure of the type dx:relativeUncertaintyType has the following appearance:
¶ Snippet from the XML schema: type definition "relativeUncertaintyType"
<xs:complexType name="relativeUncertaintyType">
<xs:choice>
<xs:element name="relativeUncertaintyXMLList" type="si:realListXMLListType"/>
<xs:element name="relativeUncertaintySingle" type="si:realListType"/>
</xs:choice>
</xs:complexType>
¶ Description of the elements
See the list of abbreviations here
| Element (Element type) |
Use | Description |
|---|---|---|
| dx:relativeUncertaintyXMLList (si:realListXMLListType) |
[O|M] | The element type si:realListXMLListType is used to give the relative measurement uncertainty. |
| dx:relativeUncertaintySingle (si:realQuantityType) |
[O|M] | The element type si:realQuantityType is used to give the relative measurement uncertainty. |
¶ Filling-in instructions
If the dx:quantityType contains a si:real and the si:real has a si:expandedUnc then relativeUncertaintySingle can be used.
If the dx:quantityType contains a si:realListXMLList and the si:realListXMLList has a si:expandedUncXMLList then relativeUncertaintyXmlList can be used.