[shapelib] what format to return null values from character fields

Rob Cairns iotc at 3i.co.za
Fri May 12 05:16:02 EDT 2006

Thanks for the advice Frank. As you say the problem is a notional rather 
than programming issue. I initially thought that we should standardise on 
dBase specifications, but on reflection think its better to go with ESRI 
specifications because the dbf table is really part of a composite 
shapefile. There is an article at 
Show&d=18868 which seems to suggest that a null value in a number field 
should be returned as VT_NULL while a null value in a string field should 
be returned as an empty string "".
Best Regards

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