The article you are reading is open. It is not open source, it is not open licensed. It is not freely available in any other medium, it is copyrighted by me.
But it is “openly” available to anyone with a web browser that wants to read it. Is that open ?
If Cisco or VMware publishes an API to their proprietary platforms with compiled software and no access to the source. Is that open ?
Which part is open ? What part do you want to be open ?
If Broadcom doesn’t publish the API used by the device drivers for OpenLinux or Cumulus Linux, but makes it available to companies like BigSwitch or in its own network operating system BroadcomOS, Is that open ?
Do you care if internal code like this is open ? What advantages would there be if it was open ?
OpenDaylight and OpenStack are very open. Open source licenses tend to be open. But the documentation is the code and useful information can be hard to find. Is that open ?
I’m not sure what open is. I’m not sure that many people understand.
If you open a box, is it open ? If you close the box, is there still open-ness inside ?