Definitions of sensor characteristics - e.g. "Sensitivity"

[oldskeptic]

The current definition of ssn-system:Sensitivity reads as "the quotient of the change in a result of Observations and the corresponding change in a value of an ObservableProperty being observed, under the defined conditions. As an ActuatorProperty Sensitivity is the quotient of the change in a command of Actuation and the corresponding change in a value of an ActuatableProperty".

However:

• Example B.9 DHT22 Description makes use of sensitivity as a "Deadband" property.
• Example B.11 IP68 Smart Sensor makes use of sensitivity as the minimum power level at which the receiving node is able to clearly receive the bits being transmitted.

Obviously, I have a similar use case for the GPS Receiver examples (#190), can we resolve this to prevent term confusion?

[oldskeptic]

Another term is also "BatteryLifetime" which was imported from ssn-system but needs more documentation.

[maximelefrancois86]

Many of those terms have just been pulled from the 2005 version of SSN
see for example https://www.w3.org/2005/Incubator/ssn/ssnx/ssn#BatteryLifetime

To a limited extent, I can trace back its provenance in the SSN wiki:

• https://www.w3.org/2005/Incubator/ssn/wiki/SSN
• https://www.w3.org/2005/Incubator/ssn/wiki/Operating_Model
• https://www.w3.org/2005/Incubator/ssn/wiki/SSN_Energy
• https://www.w3.org/2005/Incubator/ssn/wiki/Ontology_modules_(rationale)

[dr-shorthair]

@alexrobin @oldskeptic @maximelefrancois86 @rob-metalinkage
we really need a review and critique of the whole System Capabilities section -
https://w3c.github.io/sdw-sosa-ssn/ssn/#System-capabilities

Re-factor into registers / catalogs ??

[dr-shorthair]

Potential overlap with W3C Devices and Sensors WG work?

[alexrobin]

I would really like to keep these defs, but they can be moved to a separate namespace.
The Connected Systems SWG could maintain these if it's outside the scope of the OMS SWG.

[oldskeptic]

Following up to yesterday's teleconference, @rob-metalinkage was suggesting that this should be tied to external catalogs. I see the benefits of this, however very few people have published "solid" RDF/OWL2 catalogs besides QUDT; we still are at the talking stage for CRS or TimeZone RDF catalogs and it's been several years.

I'm not throwing stones but pointing out that there is limited bandwidth and it's not always clear what the 95% solution is. I'd like to document what we have while making the path to external catalogs clear.

If the incubator pages that @maximelefrancois86 dug up are the direction that Sosa was intending to take for sensor characteristics, I'd like to use them to document the terms already exist.

I am low on coffee this morning, so I will foolishly volunteer to write a side catalog / ontology / vocabulary for consumer grade batteries.

[dr-shorthair]

I would really like to keep these defs, but they can be moved to a separate namespace. The Connected Systems SWG could maintain these if it's outside the scope of the OMS SWG.

They are in a discrete namespace - ssn-system: - so quarantined from the main sosa: ns already. Possibly no change required except to improve the textual definitions. Thanks for the offer @oldskeptic ;-)

[dr-shorthair]

Maybe this issue is a sub-topic of #233 ?