When trying to edit Track Details from the Nepomuk collection all tracks are grayed out, while the same tracks are editable when the dialog is opened from the Local Collection.
This is expected behavior in the current status of the Nepomuk Collection. The Nepomuk plugin is only reading from the Nepomuk database and there is no writing back to the database done as of now. Exception being the rating of the tracks. Once the 'write back' part is completed, we can expect normal behavior.
Oh, I wasn't aware of that, thanks. Moving to wishlist so we can close it once it is implemented.
Since Nepomuk has been discontinued and KDE is now using a different technology, I close this as unmaintained. The Nepomuk Collection element will be removed.