A family of Microsoft word processing software products for creating web, email, and print documents.
There's a LOT of information out there about Creative Commons--so much that when I googled for it in hopes of answering your question, I decided to wait and let someone more knowledgeable reply. But you may find more of what you're looking for at https://creativecommons.org/about/cclicenses/ and https://creativecommons.org/licenses/ If the license is "Public Domain," no attribution is required, and if you find no license information, then perhaps this is the type of license involved.