Help with using tags in web source

Hi All,

I'm trying to find out if its possible to use the value of a current tag to create a second tag in Web Source?

Here's an example:

MP3 has a current tag called "BookNum" with "01,02,03" in it respectively

I have a Web Source that gets the main album name from a Wikipedia and would like to pull the value of "BookNum" so the script would set the Album to "Album 01".

hope this is possible. I've seen it was asked for back in 2011 but was not able to find any more info on it using the search.


What about an action of the type "format value" for ALBUM?
Format string: %album% $num(%booknum%,2)

Using an action does work but I was hoping to have the web source do it without adding another step as I have the tag to tag action all setup to create the title, so I would have to remember to change from title to album and swap the formula instead of just hitting ctrl-5 enter.