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15:52:59 <dbooth> Meeting: FHIR RDF
15:53:03 <dbooth> Chair: David Booth
16:05:19 <dbooth> Topic: ITS meeting
16:05:20 <dbooth> https://www.w3.org/2024/01/30-hcls-minutes.html
16:07:45 <dbooth> Topic: DICOM
16:08:11 <dbooth> Erich: Met w Detlef.  INt in working together.
16:08:16 <dbooth> DBooth: What end product?
16:08:29 <dbooth> erich: Their working on an RDF-driven imaging system.
16:09:10 <dbooth> ... INt in having an official RDF spec for DICOM.  They have their own cut of it, as basis.  They seemed open to that idea.
16:09:26 <dbooth> eric: Other stakeholders who should be included?
16:10:09 <dbooth> erich: IDK.  They'ave posted an OWL ont.   SHACL defined.
16:10:29 <dbooth> ... Normative files for DICOM are XML.  Have to parse them to get tables out.
16:10:51 <dbooth> eric: The first FHIR RDF was XSLT that converted FHIR XML to Turtle.
16:11:31 <dbooth> erich: Not sure how much to invest, because DICOM puts out a new version every quarter.
16:11:55 <dbooth> ... There's an open source python to parse the XML, but it's out of date.
16:12:47 <dbooth> DBooth: Is the XML really the authoritative source?
16:12:57 <dbooth> ... Or do they gen it from something else?
16:13:08 <dbooth> erich: It's the authoritative.
16:13:41 <dbooth> eric: W First FHIR RDF, Josh Mandel did something interesting.
16:13:57 <dbooth> erich: They only maintain RDF URI for certain instnaces of data, not in general.
16:15:03 <dbooth> eric: Josh did XSLT magic, parsing structure defs, and the XSLT walked through that and instance data to emit stuff.  So the XSLT was scaffolding for generated schema.
16:15:35 <dbooth> ... That meant when you changed the spec you didn't update the XSLT, you just regenerated from the FHIR spec.
16:15:51 <dbooth> eric: https://www.w3.org/2013/C-CDA/IJ.xml
16:17:31 <dbooth> erich: Also they have value representations, defs for their datatypes.  They have a few numeric types that are representated as strings.  Would want ints stored as ints, dates stored as dates, etc.
16:18:11 <dbooth> eric: FHIR has some places that require microparsing, like dates.  For FHIR RDF we decided we wanted fully defined types.
16:18:24 <dbooth> erich: W 20B triples you notice the performance quickly.
16:19:12 <dbooth> ... I started needing a SPARQL rule set to parse and convert things.
16:19:58 <dbooth> DBooth: Does the XML have well defined patterns, or idiosyncratic?
16:20:11 <dbooth> erich: Fairly well defined.
16:20:39 <dbooth> ... Int in anyone else int in this.
16:20:50 <dbooth> eric: Is the python still effective?
16:21:39 <dbooth> erich: Might be worth contacting the innocolitics group. https://dicom.innolitics.com/ciods
16:22:17 <dbooth> eric: In FHIR, representations are defined as representations of an abstract syntax.
16:23:27 <dbooth> erich: Everything is tables of data.  CHatGPT converted some of their defs to SHACL
16:24:18 <dbooth> eric: The browser covers everything in the spec?  Erich: Yes.
16:25:20 <dbooth> erich: In my implementation, I prefix the hexadecimal as IDs.
16:26:27 <dbooth> erich: Here's their repo: https://github.com/innolitics/dicom-standard
16:29:33 <dbooth> DBooth: If they're already unhappy w XML as the authoritative, might they consider changing to a more readable abstract format?  If so, what?
16:30:34 <dbooth> Topic: Remaining HAPI updates
16:30:49 <dbooth> eric: Hope to work w Claude in Liden, 2 weeks from now.
16:34:15 <dbooth> ADJOURNED
16:35:05 <dbooth> Present: EricP, Erich Bremer, Rob Hausam, David Booth
16:35:09 <dbooth> rrsagent, draft minutes
16:35:11 <RRSAgent> I have made the request to generate https://www.w3.org/2024/02/08-hcls-minutes.html dbooth
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