rdfs:comment Links a property to a unique, constant, quality, or quantity value for that property. A quality, "4.27 m"^^cdt:ucum .
```
This property is a @en
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