New category for undetermined instrumentation

[Davydov]

As a result of a recent discussion. I've created a new category for "Works with undetermined instrumentation", for use in cases where IMSLP only has arrangements of a work, and the instrumentation of the original work can't readily be ascertained.

The code "und" should be used on the workpage in place of the instrumental tags, with the work type and language tags (if applicable) being given as normal. The workpage will then appear in the category Works with undetermined instrumentation.

The "und" tag should be replaced if the original instrumentation can be established.

[steltz]

Good stuff -- this will be very useful.

[Davydov]

And thanks to you and all the other members of the tagging team for all your efforts over the last 12 months! Happy Christmas to all.

[steltz]

And a Merry Christmas to you as well!