I think "OSI Approved Open Source License" could easily be an OSI trademark, if it's not already.
Ironicallly, like many other organizations, Elastic themselves have used OSI's approval as a benchmark for 'open source'[1]:
> Is X-Pack now open source?
> Updated on 2018-04-24 with a link to the Elastic License
> Open source licensing maintains a strict definition from the Open Source Initiative (OSI).
> As of 6.3, the X-Pack code is open under the Elastic License. However, it will not be 'open source' as it will not be covered by an OSI approved license. The interaction model for open X-Pack will be identical to the open source Elastic Stack, including the ability to inspect code, create issues and open pull requests via our existing GitHub repositories.
Ironicallly, like many other organizations, Elastic themselves have used OSI's approval as a benchmark for 'open source'[1]:
> Is X-Pack now open source?
> Updated on 2018-04-24 with a link to the Elastic License
> Open source licensing maintains a strict definition from the Open Source Initiative (OSI).
> As of 6.3, the X-Pack code is open under the Elastic License. However, it will not be 'open source' as it will not be covered by an OSI approved license. The interaction model for open X-Pack will be identical to the open source Elastic Stack, including the ability to inspect code, create issues and open pull requests via our existing GitHub repositories.
[1] https://www.elastic.co/what-is/open-x-pack