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In version 1.9 the FieldDescription class was used to query the attributes of a field in a table.

How is this done now?

In version 2.0 all data access has changed. To query the attributes that describe a field in a table you have to make use of the FeatureAttributeDescriptor class.

A vector layer has a FeatureStore, which in turn has a defaultFeatureType, that defines the structure of the feature by means of the FeatureAttributeDescriptor.

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