Hi,

I would like to union features by two or perhaps more attributes. I wonder if 
the current Union/Dissolve/Merge tool could be developed to support the use of 
combined classes. In my use case I have two integer attributes which define the 
classes and it is a bit tricky to calculate a new concatenated field from 
those. Perhaps it is possible to do with the Beanshell Attribute Calculator but 
it is not obvious for me how. An example: I have two integer attributes and I 
would like to concatenate their values to one field which I would like to use 
for merging later. If the attribute values are A=80 and B=20, how could I 
conbine them into "80-20" or something like that? Well, in this case I could do 
(100xA)+B=8020 but what to do if I had also strings to concatenate as A=80 and 
B=true? I can do the task fine with Spatialite but it would be a bit more 
fluent to do everything with OpenJUMP.

-Jukka Rahkonen-

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