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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
IANAL, but common open source licenses is a Yes. Non-licensed works are legally murkier.
You have a derivative work based on the original. The author retains the copyright, but has granted some permissions within the license document. What you can and can't do will be spelled out there. For example, the MIT license expressly permits modification and sublicensing [0]. The GNU GPL3 is even more explicit, giving definitions to modify, distribute, their permissions, and the requirements for both [1]. Double-check what the terms of the license give you explicitly.
What if their is no license? I think that gets closer to the heart of the article. Imagine you come across a website design you like. What are the permissions for their HTML or CSS? By definition the distributor controls all aspects under copyright. But if you only use a small part, you can defend yourself under Fair Use. But this is murky legal territory, as Entertainment companies and individuals have sued each other over Music Samples and their relevant copyright and licensing.
[0]: https://mit-license.org/
[1]: https://www.gnu.org/licenses/gpl-3.0.en.html