Deprecate ObservableProperty, ActuatableProperty

[dr-shorthair]

Only sosa:Property is needed.
No functional difference between the sub-classes.
Legacy sub-class relationships in ssn-deprecated.ttl would preserve backward compatibility.

See argument here: #235 (comment)

[dr-shorthair]

@alexrobin @KathiSchleidt @ldesousa any comment on this?

[ldesousa]

I am in favour of this change.

[dr-shorthair]

Kathi also agreed earlier
2024-09-25 telecon agreed with this.

[sgrellet]

fine with me as well

[alexrobin]

I support this as well

[dr-shorthair]

@alexrobin @sgrellet could you review #249 please?

[alexrobin]

The only thing I noticed is this part of the documentation of Actuator that I don't think is necessary anymore:

Restriction: sosa:forProperty ONLY sosa:Property

Same thing in the RDF:

sosa:Actuator 
  rdfs:subClassOf sosa:System ;
  rdfs:subClassOf [ a owl:Restriction ; owl:onProperty sosa:forProperty ; owl:allValuesFrom sosa:Property ] ;

However, should the Actuator class have a restriction on the new actsOn property though?

Otherwise, it looks good to me.

[dr-shorthair]

Right. That restriction is 'inherited' from the parent class sosa:System.
Also missed similar on sosa:Sensor.
Fixed now.

@alexrobin @sgrellet could you approve review so it can be merged.