Updated the range of s4city:hasCalculationPeriod to time:TemporalDuration

Closes #2

See merge request SAREF/saref4city!4

Delete CITY.graffle

See merge request SAREF/saref4city!6

Updated the range of s4city:hasCalculationPeriod to time:TemporalDuration instead of time:TemporalEntity.
Closes #2

Updated namespaces for compatibility with SAREF v3

Closes #3

See merge request SAREF/saref4city!2

Fixed the prefix.

Closes #1

See merge request SAREF/saref4city!1

Closes #1.

OnToology update

OnToology update

updated metadata about modification date

change rdfs:labels by rdfs:comment

removed /v1/

OnToology update

and reconciled namespaces

OnToology update

Removed blank nodes in SAREF4AGRI

Merged Use case 1 and 2 models

updated diagram SAREF4AGRI

New diagram including livestock use case