I want to create a web map on which only a selection of data from a layer is displayed. To the best of my knowledge the tool seems to output the full layer.
In Mapinfo I'd run a query to create a new table which would display only the selection of data I want. I've not done anything similar with QGIS - and I don't know if it would work if I did.
I realise I could pursue a non-elegant solution in the short term - extracting data from the layer and saving it as a new file... but there must be a more flexible/elegant way (because this layer would need to be updated each time the parent layer changed).