---+!! %TOPIC%

%META:TOPICINFO{author="GregorHagedorn" date="1092823020" format="1.0" version="1.3"}%
%META:TOPICPARENT{name="SchemaDiscussion"}%
I have noticed that SDD or should i say UBIF does not ensure that Classname's are unique even in the same Dataset.
 
A Class can be defined twice with the same Label,Rank,LSID etc etc with different keys of course.

I am in the process of writing some kind of a simplistic SDD editor and this is an issue i am struggling with right now.

Here is a snippet of an example borrowed from Gregor's SDD_tech.xml with a few additions.

<verbatim>
<ClassName key="1">
	 <Label>
	<Representation language="en">
		 <Text>Cypselurus heterurus (Rafinesque, 1810)</Text>
	</Representation>
	</Label>
	<Link>
	<LSID>lsid.gbif.net:www.fishbase.org:1029</LSID>
	<URL>http://www.fishbase.org/Summary/SpeciesSummary.cfm?ID=1029</URL>
	</Link>
	<RankLevel>species</RankLevel>
</ClassName>
<ClassName key="5">
  <Label>
	<Representation language="en">
		<Text>Cypselurus heterurus (Rafinesque, 1810)</Text>
	</Representation>
  </Label>
  <Link>
	<LSID>lsid.gbif.net:www.fishbase.org:1029</LSID>
	<URL>http://www.fishbase.org/Summary/SpeciesSummary.cfm?ID=1029</URL>
  </Link>
  <RankLevel>species</RankLevel>
</ClassName>
</verbatim>

-- Main.JacobAsiedu - 28 Jul 2004

Thanks for pointing this out. What do you propose? I would think, requiring the label to be unique for each language should be sufficient. Of course, really the different linking IDs should be unique as well, but that is a bit still under development and discussion.

-- Gregor - 29 Jul 2004

---

I have added language specific uniqueness constraints and close the topic. Many thanks!

-- Gregor Hagedorn - 18 August 2004
%META:TOPICMOVED{by="GregorHagedorn" date="1092822970" from="SDD.NonUniqueNessOfClassName" to="SDD.ResolvedTopicNonUniqueNessOfClassName"}%