rdfs:comment .
Property `seas:subSystemOf` is functional, and,.
```
The asymmetric aspect of property, a non-simple property (e.g., a functional property@en
rdfs:comment , then they must be linked by property,> .
```
Property `seas:connectedTo` is symmetric:
```
if x, seas:connectedTo x.
```
This property can be @en
rdfs:comment feature of interest a property of which it observes,.
If `x` observes a property, then it also, observes the feature of interest of this property@en