Meeting minutes
Concept IRIs
gaurav: I submitted a zulip request for reviews on MeSH IRI stem proposal.
DICOM
https://
gaurav: Noticed DICOM discussion on zulip. Trying to figure out how to map DICOM element codes to URLs.
erich: THere was some RDF and/or IRI work done previously, that still seems to be maintained.
The comment in the official RDF DICOM OWL file, "DICOM PS3.16 DCMR Annex D DICOM Controlled Terminology Definitions; converted by "extractdcmdefinitionsasowl.xsl"
detlef: Last week we discussed whether we should use RDF lists. Should we make an issue for it? Erich: Yes.
ACTION: Detlef to make an issue on whether to use RDF lists in DICOM
erich: Most of the poly stuff maps into a well-known text string (using the latest), but that isn't necessarily performant.
… Nor would binary necessarily be performant, because nothing is indexed.
erich: Torn between wanting it performat vs easier for exchange.
dbooth: I would lean toward ease of exchange, for standards purposes, since different use cases will usually need to tune their own data for performance anyway.
erich: How far do we want to pull DICOm into the RDF world?
dbooth: channeling EricP, I think he would argue for pulling toward RDF.
detlef: Web services don't look like DICOM at all.
… One advantage of RDF is that you have not only transport format, but a format you can store and merge.
… Should be a goal.
… We had a problem of how to make private data elements unique, so they don't clash.
… For ER diagrams, they require that the elements be consistent acros multiple files.
… If you merge them, they all need to go into one instance.
… There's one concept that has a hierarchical structure. E.g., if you get a DVD.
… One is directory of what is on that disc.
… They use a hierarchical structure for that.
… DICOM should be familiar concept. But hard to transport hierarchy in RDF.
… In RDF we could do it with OIDs.
erich: THe OID could be the DICOM OID instance, with refers to the file you're trying to represent.
detlef: A typical DICOM also contains others, at least 3 OIDs.
erich: I went that route with COVID images, and it went nicely.
… You can reconstitute the hierarchy simply by merging the data.
erich: In the SPARQL WG, someone mentioned undef in a list. Should the SPARQL group own the whole undef problem.
ADJOURNED