wiki-archive/twiki/data/TAPIR/UsingBiocaseOperators.txt

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---+ Using BioCASE operators
*Description:*
For DiGIR it means:
* creating a new unary logical operator called*not*.
* dropping the logical operators*andNot* and*orNot*.
* creating two new comparative operators called*isNull* and*isNotNull* to query for "NULL" values
*Impact:* DigirPortalPresentation, DigirProvider (filter builder and local filters in the configurator)
*Comments:*