I have just gone through a large migration of me blog from DotNetNuke and all was fine using the BlogML Importer (Works great) the problem was that the tags are handled differently in DNN and the blogML Exporter was not the best, I had to do several edits
to get the xml correct. But know I would like to do some mass tagging.
The idea I am thinking of is to run some tsql to update the backend. What I was going to do in english was first make sure that there was a tag in the system, then go through the blog posts (Subject first) and search for that key word. I would then link
that post to the tag. After this I was going to search the contents of the Blog Post for the Key word and add the link to the tag. When doing this making sure that the post didn't already have the tag linked.
I was thinking of TSQL First, but I am thinking that doing this ast a code or script level may make it easier for others to use if the wanted or found the need to.