Agenda

1. Logistics: Welcome, Minutes Review, Agenda Review, Chat Room
   
2. Review of W3C Semantic Sensor Network Status
3. Process: Concepts to Ontology
4. Updates to Ontology
   1. Modifications
      Changes proposed based on work to date
   2. Additions
      Terms from the facets that have been added
5. End Logistics: Next meeting, Action items, Attendees
   

Minutes

Logistics: Welcome, Minutes Review, Agenda Review, Chat Room

Review of W3C Semantic Sensor Network Status

Discussion:

• This Incubator working group (more info in 03.31 Minutes) had an initial meeting a week or two ago, mostly getting to know each other, and setting meeting times. It has participants from all over the world.
• The charter can be found at Semantic Sensor Network Incubator Group. Our MMI DOWG team has a nice mention.
• The first activity is an activity survey/white paper (may take as long as 6 weeks), and a key action item is for me/MMI to put forward our knowledge of projects in this area.
• Given our recent progress, seems likely our work will be quite useful to theirs.

Process: Concepts to Ontology

Links:

• Ordered Facets list
• Process to reflect the facets into the ontology
  
• Related Ontologies

Discussion:

• Two weeks ago, we went through the process with a test case and a small number of telecon participants.  It has been edited significantly in response.
• Last week, Carlos made a number of changes to reflect that meeting's discussion. They are reflected below.
• In the last day or two, Carlos and John had a discussion of how to handle 'instance data,' which is more subtle than John realized.
• A key point is that we don't need to reflect detailed instances in the Ontology; these are seen in actual implementations that use the Ontology. (See also Discussion under the Updates to Ontology, below.)
• (Carlos) Capture the necessary details from this exchange in the instructions.

Updates to Ontology

+ Created datatype property: System hasSerialNumber string (7.a.1)

+ Created class Manufacturer (1.a)
+ Created object property: System hasManufacturer Manufacturer

+ Created class Medium (2.a, 3.a.1)
+ Created object property: System hasMeasuredMedium Medium (2.a)
+ Created object property: System hasDeployedMedium Medium (3.a.1)

+ Created class Restriction (1.d, 3.c)
+ Created class OperationalRestriction subclassOf Restriction (3.c)
+ Created object property: System hasOperationalRestriction OperationalRestriction


- Removed datatype property: Identifier serialNumber Any
- Removed datatype property: Identifier manufacturerName Any
- Removed datatype property: Identifier modelNumber Any
- Removed datatype property: Identifier longName Any
- Removed class: Identifier

Most of these changes are reflected in the following figure.

Discussion:

• Particpants are encouraged to use a similar format as the above to report additions/deletions/changes to the ontology.
  
• Proposal to remove ObservingSystem: it's confusing as a sibling of the Sensor and Sampler classes, as they are potential participants in an observing system. Ok, will be removed (although we will eventually re-incorporate it apprpriately at a later iteration).
• What if an ADCP instrument changes in some operational way, for example, its pressure range has changed?  Note that this will be a particular event to a particular *instance* of System. Our focus is at the class level, so changes like this should only (ideally) affect the particular instantiation of the ontology, not the ontology itself.
• Suggestion to have OperationalRange as a superclass of OperationTemperatureRange and OperationPressureRange -- good. (Bob is going to work on the operational restriction facets, btw.)
  
• Agreed to 'make changes' to the ontology to reflect our assignments, by giving Carlos a list of changes in the above format, and letting him update the ontology and diagram.  (May look at collaborative ontology editor in the future.)

End Logistics: Next meeting, Action items, Attendees

Action Items

Next Telecon Time

Next telecon is Tuesday 2009-04-28 at 1500 GMT.

Attendees:

• Bruce Andrews
• Bob Arko
• Nan Galbraith
• John Graybeal
• Roy Lowry
• Carlos Rueda