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1.2
date	2007.01.09.00.00.00;	author MoinMoin;	state Exp;
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1.1
date	2007.01.09.00.00.00;	author MoinMoin;	state Exp;
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@Revision 2
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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:* 

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*Impact:* DigirPresentationLayer, DigirProvider (filter builder and local filters in the configurator) 
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