15:03:48 <RRSAgent> RRSAgent has joined #hcls
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15:03:50 <trackbot> RRSAgent, make logs world
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15:03:52 <trackbot> Zakim, this will be HCLS
15:03:52 <Zakim> ok, trackbot
15:03:53 <trackbot> Meeting: Semantic Web Health Care and Life Sciences Interest Group Teleconference
15:03:53 <trackbot> Date: 19 April 2016
15:04:35 <dbooth> Chair: David Booth
15:05:20 <Sajjad_Hussain> Sajjad_Hussain has joined #hcls
15:05:40 <dbooth> Topic: ShEx generation
15:06:08 <dbooth> harold: I submitted a reasonably complete shex generated.  Ball is now in Grahame's court.
15:06:46 <dbooth> ... Made some changes to references, where there is a choice of person or organization.
15:06:56 <dbooth> ... Since the type is a URI, how do you record that fact in shex?
15:07:06 <dbooth> ... We made a proposal on that.
15:07:23 <dbooth> ... Shex gives you a choice of a simple URI or a shape.
15:08:52 <hsolbrig_> <PatientReference> { 	a [fhir:PatientReference]?, 	fhir:uri.id @<id>?, 	fhir:uri.extension @<Extension>*, 	fhir:uri.value (xsd:anyURI OR @<Patient>) }
15:09:49 <hsolbrig_> fhir:Observation.subject 	(	@<PatientReference> OR 		@<GroupReference> OR 		@<DeviceReference> OR 		@<LocationReference> 	)?,
15:11:35 <hsolbrig_> <uri> { 	fhir:uri.id @<id>?, 	fhir:uri.extension @<Extension>*, 	fhir:uri.value xsd:string? }
15:14:14 <hsolbrig_> <PatientReference> { a [fhir:PatientReference]?, fhir:uri.id @<id>?, fhir:uri.extension @<Extension>*, fhir:uri.value (xsd:anyURI OR @<Patient>)? }
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15:17:55 <hsolbrig_> https://hl7-fhir.github.io/observation-example.ttl.html
15:18:50 <dbooth> The snippet:
15:18:50 <dbooth> [[
15:18:51 <dbooth>   fhir:Observation.subjectReference [
15:18:51 <dbooth>      fhir:reference <http://hl7.org/fhir/Patient/example>;
15:18:52 <dbooth>      fhir:Reference.reference [ fhir:value "Patient/example" ]
15:18:54 <dbooth>   ];
15:18:56 <dbooth> ]]
15:20:06 <dbooth> eric: Should we use URIs for RDF linkage or a string?   A string would require an additional step to connect it.
15:20:14 <dbooth> ... I favor relative URIs.
15:21:05 <dbooth> tony: We discussed having both the string and a URI.
15:21:27 <dbooth> ... And the URI may be the same as the string.
15:22:02 <dbooth> ... We discussed using reference.link for the URI.
15:25:29 <dbooth> eric: XML schema for FHIR XML treats a patient ref and a provider ref identically -- no validation beyond the fact that it is a reference.
15:25:40 <hsolbrig_> [[
15:25:42 <hsolbrig_>  <subject>     <reference value="Patient/example"/>   </subject>   <encounter>     <reference value="Encounter/example"/>   </encounter> <subject>     <reference value="Patient/example"/>   </subject>   <encounter>     <reference value="Encounter/example"/>   </encounter>
15:25:46 <hsolbrig_> ]]
15:25:58 <hsolbrig_> (well that didn't work, but...)
15:27:04 <dbooth> eric: We can be more specific in RDF about the type.  We can do much better validation than that.
15:27:39 <hsolbrig_> @dbooth -- is the formated paste key "The snippet:"?
15:28:09 <hsolbrig_> q+
15:28:12 <dbooth> ... But we may have to do that modally: one shex that enforces that; one that doesn't.  Validating a FHIR resource in isolation would use the looser one; validating a collection of resources together could use the stricter one.
15:28:54 <dbooth> q-
15:29:28 <dbooth> harold: One thing disconcerting: the URI shape and patient ref shape do not line up well with what grahame was publishing as the emitted RDF.
15:30:01 <dbooth> ... Observation.subject has been turned into observation.subject.reference
15:30:17 <Tony> Tony has joined #HCLS
15:31:55 <dbooth> ... Grahame's RDF says fhir:Observation.subjectReference
15:32:14 <dbooth> https://hl7-fhir.github.io/observation-example.ttl.html near the bottom
15:34:19 <dbooth> lloyd: Guessing it's a bug in his code
15:34:58 <hsolbrig_> <reference value="Patient/example"/>
15:36:11 <dbooth> harold: Could that equally well say <reference value="foo/example"/>
15:37:06 <dbooth> lloyd: Three styles of URL.  1. It could be a full URL.  2.  Local -- same server; 3. Contained reference, which would not have "Patient/"
15:38:18 <dbooth> ... The first two require "Patient/" in them.
15:39:34 <dbooth> dbooth: Next-to-last path segment in the URI?
15:39:55 <dbooth> lloyd: Yes, or fourth-to-last if you are doing version-specific references.
15:40:22 <dbooth> eric: Then you need to know that the versions are not using those strings.
15:40:53 <dbooth> ... Then you could parse from the right to figure it out.
15:42:09 <dbooth> ... We could make them all look liked contained if when converting to FHIR RDF, you have a ref to Patient/example, then you add a triple giving the type.
15:45:26 <dbooth> dbooth: Should we have another stricter shex to check the type of the referent?
15:48:22 <dbooth> ... If we make one, would it be an alternate download?   As a separate tab?
15:49:15 <dbooth> ... Would the type arc be required in RDF?
15:50:10 <dbooth> lloyd: You can easily write a regex.  Do we really want to?
15:51:31 <dbooth> dbooth: Inclined to leave out the type arc from the reference.
15:53:27 <dbooth> ... Seems like it might require messy parsing to include the type arc in every reference.
15:55:20 <dbooth> ... Also a convenient delineation to have the type arc only when you have the actual resource object.
15:57:43 <dbooth> tony: Validate after you pull in that other resource.
15:59:10 <dbooth> ISSUE: Should a type arc be required for the target of a reference?
15:59:10 <trackbot> Created ISSUE-21 - Should a type arc be required for the target of a reference?.  Please complete additional details at <http://www.w3.org/2014/HCLS/track/issues/21/edit>.
15:59:24 <dbooth> ISSUE: Should a type arc be allowed for the target of a reference?
15:59:24 <trackbot> Created ISSUE-22 - Should a type arc be allowed for the target of a reference?.  Please complete additional details at <http://www.w3.org/2014/HCLS/track/issues/22/edit>.
16:03:49 <dbooth> ACTION: harold to make a dir on github for shex
16:03:49 <trackbot> Created ACTION-53 - Make a dir on github for shex [on Harold Solbrig - due 2016-04-26].
16:03:57 <dbooth> Topic: 5pm call
16:04:15 <dbooth> tony and harold cannot make it; eric is at risk.
16:04:26 <dbooth> dbooth: I'll cancel the 5pm call.
16:04:30 <dbooth> ADJOURNED
16:05:15 <dbooth> rrsagent, draft minutes
16:05:16 <RRSAgent> I have made the request to generate http://www.w3.org/2016/04/19-hcls-minutes.html dbooth
16:06:54 <dbooth> Present: David Booth, Lloyd McKenzie, EricP, Harold Solbrig, Sajjad Hussain, Tony Mallia
16:07:10 <dbooth> rrsagent, draft minutes
16:07:10 <RRSAgent> I have made the request to generate http://www.w3.org/2016/04/19-hcls-minutes.html dbooth