(42)Open-source modular systematic 1.1b - (42)OS(S)MC:

Forword:
Mode42.net holds the author's copyright on this work, nothing more/else by international laws and local laws by unexceptional international rules and laws.
Explained, there are many licenses and here will an solid systematic presented.

Short:
OpenSource as one whole is explained best as free-obtainable product/contribution (software/knowledge/etc) under its own regulations.
One is business friendly the other excludes business the next is part-able of commercial products/contributions and more by the own regulations.
Here will only a systematic presented for more comfortable handling for the spectrum of open-source products/contributions.

OSSMC, why:
There are facts and myths, no individual/single cases are explained here, but the spectrum of possible open-source contributions/resolutions and their possibilities as a system.
First, open-source is not to release/contain everything about the product/contribution, but only what is to be published under the respective license of the product/contribution.
Open-source can be all about the product/contribution or only up to the finished part of a product, or anything else about the product/contribution.
Everything and part(s) is release-able as open-source by the copyright/founder or developer/rightsholder.

Method:
OSSMC explains open-source as containment of under free-obtainable contributions/products as whole or parts of products/contributions.
Or as parts of not yet clarified facts, innovations and projects/developments etc.
Short, everything thats not illegal in any art and wise can be published/released as open-source as rightsholder.

Conclusion:
Open-source is not free at all, its primary an free-to-obtain under its own/given license/regulations for the products/contributions.
The choice of the right/own license is the major matter/advancement for parts and/or products/contributions.

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* OSS = Open-source software, OS = Open-source
** In this systematic-explanation OS(S)