gr:opens leaf node

@prefix gr: <http://purl.org/goodrelations/v1#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

gr:opens a owl:DatatypeProperty ;
    rdfs:label "opens (1..1)"@en ;
    rdfs:comment """The opening hour of the gr:Location on the given gr:DayOfWeek.
If no time-zone suffix is included, the time is given in the local time valid at the gr:Location.

For a time in GMT/UTC, simply add a "Z" following the time:

09:30:10Z.

Alternatively, you can specify an offset from the UTC time by adding a positive or negative time following the time:

09:30:10-09:00

or

09:30:10+09:00.

Note 1: Use 00:00:00 for the first second of the respective day and 23:59:59 for the last second of that day.
Note 2: If a store opens at 17:00 on Saturdays and closes at 03:00:00 a.m. next morning, use 17:00:00 - 23:59:59 for Saturday and 00:00:00 - 03:00:00 for Sunday.
Note 3: If the shop re-opens on the same day of the week or set of days of the week, you must create a second instance of gr:OpeningHoursSpecification."""@en ;
    rdfs:domain gr:OpeningHoursSpecification ;
    rdfs:isDefinedBy <http://purl.org/goodrelations/v1> ;
    rdfs:range xsd:time .