Thanks Keith for pointing out this video by Pierre:

 

 

And thanks Pierre for making it.

 

A supplementary question. I have made fairly extensive use of the older WikiTags approach. I can use the approach outlined in the Youtube video to import an edited version of the wikitags which I am currently using into the tags hierarchy. However, I cannot think of an easy way in which to assign tags based on the existing wikitag values of items which I have already tagged using that older system. Has anybody got a good suggestion for me?

 

Thanks!

 

Mark