I am creating a reimplementation for a different language of a software library that is licensed under the W3C Software Notice and Document License. The original library contains a NOTICE file. As my project is heavily influenced by the original I would assume that it constitutes a derived work (which I want to publish under the MIT license).
I therefore wanted to ask for some advice on how to properly attribute the original library. Is it enough to include the text
This software or document includes material copied from or derived from [title and URI of the W3C document]. Copyright © [YEAR] W3C® (MIT, ERCIM, Keio, Beihang). from the license in my README and the license text in the LICENSE file? Or do I have to create a NOTICE file myself (containing the text from the original NOTICE) and/or add the above mentioned copyright statement to every source code file in my library?