[Python-ideas] Add an UML class diagram to the collections.abc module documentation

[Yahya Abou 'Imran]

>>Right, but when I look at http://plantuml.com/ I don't see any open source code to guarantee
>>>it will be available in e.g. 5 years. (I really just see a lot of ads around a free Java app).
>>
>I see fedora packages plantuml and says is lgpl3 licensed.
>
>Barry

On archlinux:

$ pacman -Qi plantuml                                                                
Name            : plantuml
Version         : 1.2017.20-1
Description     : Component that allows to quickly write uml diagrams
Architecture    : any
URL             : http://plantuml.com/
Licenses        : GPL
[...]

Found also on debian stable in the main section (only free softwares), here is the licence:

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: plantuml
Upstream-Contact: Arnaud Roques <plantuml at gmail.com>
Source: http://plantuml.com/download.html

Files: *
Copyright: 2009-2014, Arnaud Roques
License: Expat
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the "Software"),
 to deal in the Software without restriction, including without limitation
 the rights to use, copy, modify, merge, publish, distribute, sublicense,
 and/or sell copies of the Software, and to permit persons to whom the
 Software is furnished to do so, subject to the following conditions:
 .
 The above copyright notice and this permission notice shall be included
 in all copies or substantial portions of the Software.
 .
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Files: debian/plantuml.*
Copyright: 2010 Ilya Paramonov <ivparamonov at gmail.com>
License: GPL-3+
 This script is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 .
 This script distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 License for more details.
 You should have received a copy of the GNU General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 USA.
 .
 The full text of the GPL is distributed in
 /usr/share/common-licenses/GPL-3 on Debian systems.