Authors of papers published at CEUR-WS.org retain their full copyright that they acquired by law when they created the paper. At CEUR-WS.org, they would grant a non-exclusive copyrights to their proceedings editors, who subsequently execute this right to publish a whole proceedings volume on CEUR-WS.org.
Authors may wonder what this copyright means for them. The obvious application is to store a copy of the paper on their institutional repository or their home page. In such cases, the copy of the paper carries the same bibliographic metadata as the official paper copy at CEUR-WS.org.
Another case is the re-publication by an author, e.g. by submitting the same paper to another workshop, conference or journal. Such a re-publication may legally be allowed, but would likely violate academic standards (“self-plagiarism”). In some research communities, publishing a significantly extended version of a paper at another place is regarded acceptable.
So, please consider copyright and academic standards as separate issues!