15:59:52 RRSAgent has joined #hcls 15:59:56 logging to https://www.w3.org/2026/01/15-hcls-irc 15:59:56 rrsagent, make logs public 16:00:02 Meeting: FHIR RDF 16:00:07 Chair: David Booth 16:03:37 TallTed has joined #hcls 16:07:57 Topic: Enhancing our FHIR RDF ontology 16:08:06 Ken's draft: https://lists.w3.org/Archives/Public/www-archive/2026Jan/0000.html 16:09:38 (Ken discusses the above document) 16:20:19 dbooth: https://xkcd.com/927/ 16:21:10 ... I think the best way we can proceed is to not try to tackle the problem top down (eating the whole elephant), but bottom-up, incrementally adding value to our existing FHIR ont. 16:25:06 ... Could you write up an initial use case and propose a specific ontology addition that we could consider? 16:25:10 ken: Yes. 16:25:50 ... Want to address the eligibility of individuals with housing instability. Eric Jahn is very involved in this. 16:27:10 ... There are also other use cases, not sure other people would be interested. 16:27:25 dbooth: Please propose them and we'll see. 16:27:56 ken: Natural Language Processing (NLP), an ont to define the meaning of a phrase or word might fit well. 16:28:41 dbooth: How would that relate to LLM successes? 16:29:19 ken: Each LLM has its own premises and data. The value of a shared model to train LLMs. 16:30:19 ken: Someone doing cancer analysis might use parts of this, but might also need a different view. 16:31:17 erich: What's the end game? More than an OWL ont? 16:32:17 ken: Yes. Company is very focused on data models. My background comes from business of modeling, 16:32:29 eric: What's the end game? 16:32:58 ken: Want to be able to say that this data element in this model is equiv to that data element in that data model. 16:33:26 ... Different gurus have different interpretations. 16:34:29 ... No single system has all of the data about the pt. Need to exchange data with different systems 16:36:38 Present: Ken Lord, David Booth, Erich Bremer, Detlef Grittner, EricP, Rob Hausam 16:40:24 ken: Also may want references to other models 16:41:25 ... Should also ref schema.org 16:44:03 dbooth: Don't be shy about referencing other things, such as schema.org. We can partition the ont if desired, to be modular. 16:44:45 ken: There are things in the CMS model that are not in the FHIR model. 16:45:37 ... What's the core starting point? 16:45:59 dbooth: From a practical perspective, we need to view our existing FHIR ont as our core starting point. 16:46:27 ken: It's very focused on clinical model. Doesn't support some of the things that are needed in this housing eligibility model, for example. 16:51:46 ericp: You mentioned schema.org, Eric Jahn's work. FHIR is very structural, not very ontological. 16:52:21 ken: FHIR is essential in clinical domain, but in social domains like housing, something called FHIR doesn't necessarily help. 16:53:38 ericp: We'll have use cases that w prob have subsumption, and will want clever ont, which we won't get from FHIR directly. Nothing that says medication order is related to procedure order. 16:53:55 ... Might be able to extract some interesting stuff from v3. 16:54:02 rob: Yes, there's some stuff in there. 16:54:59 ... I think a proc order is related to a med order. They follow the same pattern. 16:55:09 ericp: Good point. We don't capture that in the ont. 16:55:38 ... Maybe we could extract more ont relationships from the bindings. 16:56:10 ... The inferential value we get might help meet these use cases. 17:00:17 ACTION: Rob to create an issue that describes where semantic connections are defined in FHIR 17:02:27 rob: There's a place in the structure def for those things 17:02:38 s/Rob to/dbooth to/ 17:04:21 dbooth: issue created: https://github.com/w3c/hcls-fhir-rdf/issues/215 17:04:26 ADJOURNED 17:04:33 rrsagent, draft minutes 17:04:35 I have made the request to generate https://www.w3.org/2026/01/15-hcls-minutes.html dbooth