Question for licence

asked 2009-08-05 18:20:42 +0800

best0032001 gravatar image best0032001
69 2

Zk have 2 licence

if My bunsiness use Zk for my Product to sale customer
and i don't want support from zk team

can i use GPL ?

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answered 2009-08-06 00:28:07 +0800

jtoupin gravatar image jtoupin

updated 2009-08-06 00:28:50 +0800

You can but you have to distribute the source code to your customers and your customers will be allowed to distribute your application to others for free. Usually you would go with the commercial licensing in that case.

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answered 2009-08-06 02:20:56 +0800

best0032001 gravatar image best0032001
69 2

Thank for your Answer jtoupin

Yes if I use Zk GPL then my new Application is GPL
so it must to distribute the source code

Can I distribute source code and I not make Document for new Application if user have problem of new Application user must buy my support ?

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answered 2009-08-06 03:22:04 +0800

jeanher gravatar image jeanher
1719 1 6
ZK Team

Hi best0032001,

<info AT zkoss DOT org> can help you on your licensing questions.
Feel free to contact us.

- Jean

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answered 2009-08-06 14:21:15 +0800

taurius gravatar image taurius

First off, I'm really impressed by ZK framework, and think that it's more dev friendly then GWT - I had to fight GWT for every class code I create, so it can compile properly without some bizarre exceptions.

I have 2 licensing questions as well and it might be interesting to other readers, unless you want me to ask you by email.

We are a little startup company that do not sell any web applications to end-users, we offer free services (monetizing with ads like Adsense or affiliates) and premium access (no ads, additional premium options), think Yahoo Mail free/premium as an example.

My questions:
1) based on our business model, do we need to get commercial licence for ZK 3.x framework to go live? Or can use GPL route and, because we do not distribute anything (we web host) to the end users, we comply with ZK GPL terms without making our sources public (security issue) ?
2) with ZK 5 - is it correct that ZK 5 LGPL license allows us to offer our web-site services without opening our sources for our business model?

Thank you a lot!

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answered 2009-08-06 16:22:56 +0800

xmedeko gravatar image xmedeko
1021 1 16

hi I am not from zkoss company, but with GPL you can run any GPL code on your server without giving the sources to the user (so called ASP hole), but you give Javascript to your users, so any javascript you make has to be GPL as well.

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Asked: 2009-08-05 18:20:42 +0800

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Last updated: Aug 06 '09

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