HCL is offering a Webinar about DQL in Domino V11 with the following content:
With v11, Domino Query Language (DQL) completed its consolidation of all means of searching Domino data, using full-text indices. We will discuss and demonstrate this and other vital enhancements in this session. We will also workshop problems solved in a Collabsphere 2019 session that will show as Lotusscript agent code, so DQL can be seen in action. Lastly, the expansive future of DQL will be presented in some detail in the context of programming models and business problems it can be used to address.
Feel free and register for this great Webinar to see the options you have with DQL V11: