# mgExpression.h File Reference

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## Namespaces
namespace | OSGeo
namespace | OSGeo::FDO
namespace | OSGeo::FDO::Expression
## Classes
class | OSGeo::FDO::Expression::Expression
| Expression is an abstract base class that forms the root of an expression tree. The Expression class contains operations for converting between the well defined text representation and the object representation of an expression. More...