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16:01:33 <dbooth> Meeting: FHIR RDF
16:01:39 <dbooth> Chair: David Booth
16:14:13 <dbooth> Topic: Issue 146
16:14:14 <dbooth> https://github.com/w3c/hcls-fhir-rdf/issues/146
16:14:22 <dbooth> detlef: Would like to be able to reference each item within a list
16:15:32 <dbooth> erich: Want to also be able to reference the list itself?
16:18:03 <dbooth> detlef: We have both arrays and sequences.  Sequences can be complex objects, whereas an array can only hold primitive objects.
16:18:31 <dbooth> ... And a sequence has  a common template for all objects in it.
16:24:22 <dbooth> eric: I'll try generating a URN for each element of the list.
16:28:09 <dbooth> dbooth: In detlef's example of a sequence in which one item is the heart, and you want to reference it, how is that done in DICOM?
16:30:37 <dbooth> ACTION: Detlef to provide an exmaple of how he currently references the heart in an example like that
16:31:11 <dbooth> detleft: They look like foreign key references
16:32:10 <dbooth> detlef: Also, DICOM has an ER model, that says how these objects reference each other.  It is hierarchical, and uses relationship links.  These could be easily modeled in RDF.
16:33:11 <dbooth> ... But it broke down into FKs in RDMSs, because the std they were implementing didn't allow them to implement the ER model directly.  But I think we could in RDF.  Hierarchy is just a special case for an RDF graph.
16:33:42 <dbooth> ACTION: Detlef to create an issue for that
16:34:27 <dbooth> eric: Is there a std for the relational model?  Detlef: No.  The official std is the ER model.
16:37:11 <dbooth> eric: What about ordering of attributes?
16:37:33 <dbooth> detlef: The order is sometimes very important.
16:40:53 <dbooth> ACTION: Erich to add another option to turn list elements that start w  bnode, turn it into a URN indicating the index into the list.
16:46:55 <dbooth> Topic: Next week
16:47:01 <dbooth> detlef: I'll be out next week.
16:54:39 <dbooth> ADJOURNED
16:55:14 <dbooth> Present: Rob Hausam, Detlef Grittner, Erich Bremer, Gaurav Vaidya, David Booth, EricP
16:55:21 <dbooth> rrsagent, draft minutes
16:55:22 <RRSAgent> I have made the request to generate https://www.w3.org/2025/01/23-hcls-minutes.html dbooth