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KnowWhereGraph / KWG-SHACL

This is the repository of SHACL shapes development/research for KWG.
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Missing constraint for Observation:madeBySensor #11

Open shirlysteph opened 2 years ago

shirlysteph commented 2 years ago

minCount constraint is missing. The documentation mentions sosa:Observation sosa:madeBySensor EXACTLY 1

cogan-shimizu commented 2 years ago

Yes, but my understanding is that we did not want to actually state that there is always a materialized sensor. For example, there are no materialized sensors in the SSURGO, storm, or earthquake datasets, yet we still model them as observations. --cog

Cogan Shimizu Postdoctoral Fellow Data Semantics Laboratory (https://daselab.cs.ksu.edu/) Kansas State University (https://k-state.edu/)

Homepage (https://coganshimizu.com/)

From: Shirly Stephen @.> Sent: Monday, October 18, 2021 10:53 AM To: KnowWhereGraph/KWG-SHACL @.> Cc: Subscribed @.***> Subject: [KnowWhereGraph/KWG-SHACL] Missing constraint for Observation:madeBySensor (Issue #11)

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minCount constraint is missing. The documentation mentions sosa:Observation sosa:madeBySensor EXACTLY 1

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shirlysteph commented 2 years ago

Sounds good to me, Then we should point that out in a use-case - just briefly add few sentences for SSURGO. Because this a constraint that is different from what the SOSA RDF documentation mentions, but we do not capture in SHACL., so need an explanation as to why. Or maybe it is already mentioned somewhere in the paper and I cannot find it.

cogan-shimizu commented 2 years ago

I haven't had a chance to look at these in the paper since Friday. I'm mostly communicating ad hoc at the moment. However, it was my understanding that there are already many of these tradeoffs already made beyond this, e.g. phenomenonTime and resultTime, hasResult and hasSimpleResult, etc. Based on my draft of the introduction (not sure if it's changed) I never promised that sosa-shacl is a 1-1 translation and indeed said that the paper discusses these tradeoffs.

I'll be able to take a look tomorrow if someone doesn't do it already.

zhurui0509 commented 2 years ago

Yes. That is something how our shapes are different than SOSA. I wrote a section about it as well. Check Section 4.3: Implicit sosa:Sensor.