[MEI-L] "Cancelling" key signatures

[Andrew Hankinson]

Hi all,

The data.KEYSIGNATURE regex specifies the following valid values:  "mixed|0|[1-7][f|s]”.

However, naturals may also appear in a key signature to clarify cancelling a key signature; for example, if you were to go from Gmaj to Cmaj, you may wish to write a natural in the key signature to indicate the new key.

Perhaps the regex should be amended to: "mixed|0|[1-7][f|s|n]”?

Or is there another suggestion?

Cheers,
-Andrew