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<p>In DDI-Lifecycle 3.2 all elements which are instances of <br>
<br>
{ddi:reusable:3_2}AbstractIdentifiableType<br>
<br>
can have either URN or Agency/ID/Version sequence or both.<br>
If the element has both, the field-level specification<br>
<br>
<a id="lnk152741" href="http://www.ddialliance.org/Specification/DDI-Lifecycle/3.2/XMLSchema/FieldLevelDocumentation/schemas/reusable_xsd/complexTypes/AbstractIdentifiableType.html">http://www.ddialliance.org/Specification/DDI-Lifecycle/3.2/XMLSchema/FieldLevelDocumentation/schemas/reusable_xsd/complexTypes/AbstractIdentifiableType.html</a><br>
<br>
states that<br>
<br>
"If both URN and the identification sequence is used, <br>
and there is any conflict, the URN takes precedence. "<br>
<br>
The meaning of "taking precedence" is, to me at least, somewhat unclear.<br>
Consider, for instance, the following XML document which is valid<br>
with respect to the DDI-Lifecycle 3.2 XML Schema:<br>
<br>
---8<---8<---8<---<br>
<?xml version="1.0" encoding="utf-8"?><br>
<ddi:DDIInstance <br>
xmlns:ddi="ddi:instance:3_2" <br>
xmlns:r="ddi:reusable:3_2" <br>
><br>
<br>
<r:URN>urn:ddi:acme.org:another_ddi_instance:2</r:URN><br>
<r:Agency>acme.org</r:Agency><br>
<r:ID>ddi_instance</r:ID><br>
<r:Version>1</r:Version><br>
<br>
</ddi:DDIInstance><br>
---8<---8<---8<---<br>
<br>
In the document above, the URN and the Agency/ID/Version sequence <br>
are conflicting. According to the field-level specification, in such<br>
a case the URN takes precedence. <br>
<br>
My question is then:<br>
<br>
Since URN takes precedence, does this mean that the <ddi:DDIInstance><br>
element is known only as "urn:ddi:acme.org:another_ddi_instance:2"?<br>
<br>
In other words, is the above document equivalent to the document below?<br>
<br>
---8<---8<---8<---<br>
<?xml version="1.0" encoding="utf-8"?><br>
<ddi:DDIInstance <br>
xmlns:ddi="ddi:instance:3_2" <br>
xmlns:r="ddi:reusable:3_2" <br>
><br>
<r:URN>urn:ddi:acme.org:another_ddi_instance:2</r:URN><br>
</ddi:DDIInstance><br>
---8<---8<---8<---<br>
<br>
</p>
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