WEBVTT 00:00.920 --> 00:04.550 Well, welcome to the final part on rag. 00:04.550 --> 00:10.310 And this is the session where you go from being a rag expert to being a rag master. 00:10.520 --> 00:13.010 Uh, we are going to look today at a few things. 00:13.010 --> 00:20.780 We're going to look at the Lang chain, LCL, the Lang chain expression language, which is where we 00:20.780 --> 00:24.440 look at the declarative language for setting up these chains. 00:24.560 --> 00:28.640 Uh, and it's not something we're going to use in earnest, but we'll take a look at it. 00:28.790 --> 00:34.520 I'm going to talk a bit about how Lang Chain works behind the scenes, and we're going to fix and diagnose 00:34.520 --> 00:37.700 some common problems that come up with rag. 00:37.730 --> 00:41.600 And there's something else, something else that I just slipped in because I couldn't resist it. 00:41.600 --> 00:44.120 Something that I said we could do that was really easy. 00:44.150 --> 00:47.240 Uh, and I want to show you that we certainly can. 00:47.240 --> 00:48.950 And in fact, we're going to do that right away. 00:48.980 --> 00:54.470 So before we get on with the rest of today's activities, I'm going to take you to JupyterLab and show 00:54.470 --> 01:01.070 you something that I just knocked up to prove a little point, but to also illustrate another vector 01:01.070 --> 01:01.790 database. 01:01.790 --> 01:02.690 See you there.