Hello,
we need an OAI-PMH-Set for Item that have not a specific
metadata field.
We have defined a filter and condition but 0 items are in the Set:
<Filter id="hassourceswbfalseSetFilter">
<Definition>
<Not>
<Condition>
<Custom ref="hassourceswbfalseSetCondition"/>
</Condition>
</Not>
</Definition>
</Filter>
<CustomCondition id="hassourceswbfalseSetCondition">
<Class>org.dspace.xoai.filter.DSpaceMetadataExistsFilter</Class>
<Configuration>
<string name="field">dc.identifier.ppn</string>
</Configuration>
</CustomCondition>
Have everyone an idea how can I define a filter and a condition for this
problem.
Best regarts,
Kosmas Kaifel
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