OpenJUMP schema editor prevents from making a schema with duplicate attribute names, even with different case.
With the "Combine layer" plugin, a "LAYER" attribute is automatically added to the schema.
If a "LAYER" attribute already exist, the new attribute is named LAYER_1
But if a "Layer" attribute exists a "LAYER" attribute is added.
It is not finished. Now save the project with the Combined layer and its attributes "Layer" and "LAYER".
Close and reopen the project. The "Layer" attribute is completely empty even if it contained data before being saved.
OpenJUMP schema editor prevents from making a schema with duplicate attribute names, even with different case. With the "Combine layer" plugin, a "LAYER" attribute is automatically added to the schema.
It is not finished. Now save the project with the Combined layer and its attributes "Layer" and "LAYER". Close and reopen the project. The "Layer" attribute is completely empty even if it contained data before being saved.