"Support for business monitoring BAM :Partially supported" is that because it needs third-party software components as I found here in documentation:
https://documentation.bonitasoft.com/bonita/7.11/reporting-overview or there are other constraints?
another question :Bonita supports many connectors ,but does it support plug-ins architecture?
Business monitoring features are for our Subscriptions Editions only. Therefore if you want to monitor business data with Bonita Community Edition, you will need to use connectors and external applications.
Regarding your second question, Bonita as a BPM Platform based on Eclipse enables plug-in architecture. Moreover Bonita (and especially Bonita Enterprise Edition) has event handlers which are plug-ins to handle case management and unstructured data.
I want to learn everything about Bonita(community edition) from scratch .. Where should I start videos, or documentation .or..? I need to apply it in my work to my PhD thesis,
Bonitasoft empowers development teams with Bonita, the open-source and extensible platform to solve the most demanding process automation use cases. The Bonita platform accelerates delivery of complex applications with clear separation between capabilities for visual programming and for coding. Bonita integrates with existing solutions, orchestrates heterogeneous systems, and provides deep visibility into processes across the organization.