To know or not to know - that's the question.
What did you do to learn about and solve your problems with Regular Expression?
Well this seems to be easy or not.
The Filename can be broken down into four parts, i. e. "word number word number", delimited by space character.
You can split the filename and save the parts separately into four temporary tagfields, say TMP1, TMP2, TMP3, TMP4. Use action "guess values" or "format value with $regexp()" or other Mp3tag scripting functionalities to solve this step.
TMP1 and and TMP3 needs simple adjusting on casing, so use the Mp3tag standard function.
If the temporary tag fields got all their correct content, then combine them into a temporary tagfield TMP5, give it the structure as of the wanted filename. Use simply "format value" with a formatstring of "%TMP1% %TMP2% %TMP3% %TMP4%"
If all looks ok then set the actual filename using "format value" with the content of TMP5.
Afterwards remove the temporay tagfields using the remove tag fields action.
I've started working on this only to find that I have no clue as to how to save values to a temporary tag file.
(also no idea how to deal with the scripting. Is that all done through the "actions" tab?)
I tried using the "guess values" action as you suggested. If I understand correctly, I use %title% as the source, and either "TMP1 TMP2 TMP3 TMP4" or "TMP1 / TMP2 / TMP3 / TMP4" as the guessing pattern?
I tried doing that and then doing "format value" with the value being %title% and format string being %TMP2% %TMP4%, with the idea that it might at least show me whether or not anything had been saved for TMP2 & TMP4. Apparently nothing had, because the titles all ended up blank.
One last idiotic question and I should be done. I'm having trouble with, of all things, the case conversion.
I now have the second part of the title (the "act") stored as %TEMP2%. I want to convert all %TEMP2% to lower case letters.
I am using the case conversion action with %TMP2% set as the field, and lower case set as the case conversion. I have tried leaving the last bit (the "words begin from...etc) blank, tried setting it as "I; V; X", and tried setting it as ' ' (would that be the proper way to indicate a space?).