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<font size="+1">Thanks for your interest in my problem. I solved it
an hour or so after posting my message. I converted the data to
csv format and also created a csvt file. But most importantly, I
deselected the shapefile layer (i.e. I removed the tick in the
box). The field I wanted to display became visible then. As the
thing to do, it's incredibly obvious now, but was not obvious when
I was studying the tutorial material.<br>
Barry Martin. <br>
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