You are describing the compatibility clause as if it's settled that the EUPL simply allows you to convert to a compatible license. The compatibility clause is an unfortunate ambiguity, but it's not the intention of the license authors to lose strong copyleft and SaaS loophole protections this way. See for example here [1] [2] [3].

[1] https://interoperable-europe.ec.europa.eu/collection/eupl/di...

[2] https://interoperable-europe.ec.europa.eu/collection/eupl/ho...

[3] https://news.ycombinator.com/item?id=45422512

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Luker88 2 days ago | parent [-]

The way I read all of that is that:

* BigTech can take your EUPL library and write a small wrapper in MPL

* such a wrapper can therefore be used in any project, even a closed one that is a network service.

* however all of that still qualifies as distributing EUPL, and the EUPL core would still need to be made available under EUPL (whether modified or not).

Saying that since I have an MPL wrapper then all the code is MPL is not allowed.

So you can't just copy all the code and change the license to MPL.

This is basically AGPL without virality and anti-tivo, correct?

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pocksuppet 2 days ago | parent [-]

On the face of it, no it doesn't say that. It just says the combined work can be MPL. Then someone can take that MPL work, and distribute it without source code because the MPL allows that. It explicitly says any conflict between the EUPL and the MPL shall be resolved in favor of the MPL.

	▲	layer8 2 days ago \| parent \| next [-]
		This isn’t the intent, and will hopefully be fixed/clarified in version 1.3: https://interoperable-europe.ec.europa.eu/collection/eupl/di... A “conflict” is intended to mean the case that following some EUPL obligation (such as publishing the derived source code) wouldn’t be allowed under the alternative license.
	▲	Luker88 2 days ago \| parent \| prev [-]
		> But as none of the compatible licenses come into conflict with the EUPL by prohibiting the essential points of publication of the source code and coverage of remote distribution (closing the SaaS loophole), these obligations, that are the core of the "reciprocal" condition, persist for the derivatives concerned. aka: the compatible licenses do not put additional restrictions, so no, it is not MPL. also, from the license: > this Distribution or Communication can be done under the terms of this Compatible Licence.. So you are allowed distribution, not relicensing. To simplify It seems to me that: * GPL will automatically make something GPL. * EUPL will automatically make something selectively dual-licensing. parts EUPL, parts whatever. Also do note that EUPL is the first license to explicitly state that any issues fall under EU(Belgium) law, so EU has the last say on its license.