I just read the text of the permissive licence (HT @pwalsh) , as I understand it should be compatible with CC and ODC attribution licences (even though they are not explicitely named)
“If You Publish Data You Receive or Enhanced Data:
(a) You may do so under a license of Your choice provided that You give anyone who Receives the Data from You the text of this Agreement, the name of this Agreement and/or a hyperlink or other method reasonably likely to provide a copy of the text of this Agreement;”
If I understand correctly the background paper you sent, Linux Foundation argues the CDLA is their attempt to address licence proliferation and incompatibility across licences (in their words “difficulties to combine data”)? If this is correct, then I wonder whether this clause does not do the exact opposite. See:
“You may provide additional or different license terms and conditions for use, reproduction, or distribution of that Enhanced Data, or for any combination of Data and Enhanced Data as a whole, provided that Your Use and Publication of that combined Data otherwise complies with the conditions stated in this License.“_
But maybe Linux Foundation did not address licence incompatibility but wanted to avoid problems of reuse, whenever people could see a case of shared authorship of data derivatives? See:
“3.3 You and each Data Provider agree that Enhanced Data shall not be considered a work of joint authorship by virtue of its relationship to Data licensed under this Agreement and shall not require either any obligation of accounting to or the consent of any Data Provider.”
What are other people’s thoughts on this?