[mapserver-users] Shapefile features = 0 (zero integer value) are empty and ignored? [SEC=UNCLASSIFIED]

[Inna Nogeste]

I'm using MapServer 6.4 and have a shapefile where features have an attribute = 0 (zero integer value). I want to display these features = 0 but they seem to be regarded as null/empty features in MapServer so are ignored and won’t display on the map.

Other integer values in the same field can be displayed on the map, including the value of -1, but not 0.
I can select these records = 0 in ArcGIS and QGIS 2.8.2

Can anyone tell me how, or if, shapefile features with attribute = 0 integer value can be used in a MapServer expression, or how to enter values = 0 in to a shapefile for MapServer Expressions? 

Regards,
Inna Nogeste | Spatial Information Specialist
Geospatial Data and Services
Information Systems and Services Division 
Bureau of Meteorology
www.bom.gov.au