See also: IRC log
<laurent_lefort_cs> Previous: 2010-08-03 http://www.w3.org/2010/08/03-ssn-minutes.html
<laurent_lefort_cs> scribenick: Payam
<laurent_lefort_cs> Andriy email last night with questions http://lists.w3.org/Archives/Public/public-xg-ssn/2010Aug/0005.html
<krzysztof_j> yes, i can give a very short summary
krzysztof to give a summary on DOLCHE work
<kerry> scribenick: payam
we are discussing Andriy questions
Andriy's example is a smart environment in a kitchen and he tries to use SSN ontology for an accelerometer sensor
answer to question 1: Michael - there should be role defined for qualities in the ontology
Laurent, relationship between O&M and features we follow Simon's work on relating features to O&M
Michael, there is no link from sensor to features
Andriy, how O&M is connected to sensors?
<laurent_lefort_cs> Laurent: check the nice doco at http://www.w3.org/2005/Incubator/ssn/wiki/SSN
Michael, in the original ontology there is link from O&M to sensor and in some versions there is a link from O&M to process - but seems there is an error there in some versions.
<krzysztof_j> sorry, i have only an usb surf stick
<krzysztof_j> i will write it down
<krzysztof_j> for the ontology pattern/dolce alignment the feature of interest is linked using the role hasProperty to an observableProperty and therefore to the observation
Payam, how this link between O&M data, feature and sensor description is maintained?
Michael, there should be a link from sensor to features of quality that it measures
Michael, there is a mistake in the current ontology and the link will be fixed
<laurent_lefort_cs> Laurent: need to add a property measures => missing link (move the link from the process) o feature-of-interest
There will be a link from sensor to qualities that it measures
<michael_> more like measures <= missing o observed-quality
Andriy, if the sensor is deployed and there is no measurement data, then how this feature can be accessed (if there is no O&M data)?
Andriy, what is a feature?
Laurent, it can be an abstract entity, a geographical entity, ...
<laurent_lefort_cs> Example: a sensor measuring the vertical acceleration of a knife
<michael_> sorry, typing noise
<michael_> having measures >= missing o observed-quality doesn't mean that there is an indirection, it just means that anything that has been observed is something that the sensor can observe
Kerry, feature is an object that you take measure
Michael, qualities are qualities of features; qualities that a sensor measures can be defined. Another way is linking a deployment to a sensor (we havn't discussed the latter)
<laurent_lefort_cs> ACTION: Michael to add the missing link (and the role composition axioms manually) [recorded in http://www.w3.org/2010/08/11-ssn-minutes.html#action01]
<trackbot> Created ACTION-40 - Add the missing link (and the role composition axioms manually) [on Michael Compton - due 2010-08-18].
<michael_> measures >= missing o observed-quality
Michael, there will be a link from sensor to qualities, and there will be a link from qualities to O&M
it's clear to me now
Kerry, favouring deployment approach - features that sensor measures in deployment
<laurent_lefort_cs> ACTION: Michael to investigate or add link to feature at deployment [recorded in http://www.w3.org/2010/08/11-ssn-minutes.html#action02]
<trackbot> Created ACTION-41 - Investigate or add link to feature at deployment [on Michael Compton - due 2010-08-18].
we now discuss question 3-
units of measurement - is there any recommended or it's totally up to user to select one
Laurent, there is a UOM ontology from a group called ... QMOS?
<laurent_lefort_cs> Laurent : OASIS wg QUOMOS Quantities and Units of Measure Ontology Standard
<laurent_lefort_cs> NASA ontology: QUDT qudt.org
<laurent_lefort_cs> OMG SysML-QUDV
Jano also sent one earlier today
Laurent will send a UOM ontology to the group later
sorry, my mistake it judge based on name :)
Laurent, if we want to connect our work to others; we should leave some aspects to be linked to other existing data
question 4- how to express quality attributes and quality values
e.g. what is max, and min. values for frequency...
<laurent_lefort_cs> Laurent: see example http://www.w3.org/2005/Incubator/ssn/wiki/Modelling_of_Accuracy,_etc
question is: how to express ranges for values
<laurent_lefort_cs> Andriy asking about point 5
<krzysztof_j> why not use proxy class
we don't have detailed attributes; so we can't really define rules at this stage
Jano, we can use proxy classes... let users define equivalent classes
we discuss point 6 later
<krzysztof_j> keep in mind that domain and range are very dangerous
point 6- domain/range restrictions of properties
<laurent_lefort_cs> ACTION: Michael to remove remaining range and domain [recorded in http://www.w3.org/2010/08/11-ssn-minutes.html#action03]
<trackbot> Created ACTION-42 - Remove remaining range and domain [on Michael Compton - due 2010-08-18].
I will try
how many weeks we have left?
<laurent_lefort_cs> 3 weeks
Jano, DOLCE work update
<krzysztof_j> andriy: to point 6 are you arguing for or against domain/range for the roles?
I will try to use SSN ontology and link it to linked-data; we use DBpedia SPARQL end-points so most of resources will be from DBpedia
<laurent_lefort_cs> Laurent: LODE http://linkedevents.org/ontology/
<krzysztof_j> would be great!
<kerry> there was also a preference to avoid property explosion
Kerry, invited group members to participate and join the SSN workshop co -organised with Int. Semantic Web conference in Shanghai-
<michael_> not me
<krzysztof_j> we cannot edit the wiki?
once XG is closed, we can't edit wiki
<krzysztof_j> bye bye
<laurent_lefort_cs> More units of measurement references here: http://www.w3.org/2005/Incubator/ssn/wiki/Agriculture_Meteorology_Sensor_Network#Generic_units_and_quantities
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