External namespaces and terms

Most applications using VF will need terms defined in various other vocabularies. In fact, we consider these to be essential to a complete value flows core vocabulary. Below are the elements we are re-using from well established vocabularies (web ontologies).

SKOS

https://www.w3.org/TR/skos-reference/

• skos:note

OM2

http://www.ontology-of-units-of-measure.org/resource/om-2/

• om2:Measure
• om2:hasUnit

• om2:hasNumericalValue

• om2:Unit

  • See the page also in this section called Units of Measure.
  • VF will use (at least) rdfs:label and om2:symbol as properties of Unit.

DTYPE

http://www.linkedmodel.org/schema/dtype#

• dtype:numericUnion

TIME

https://www.w3.org/TR/owl-time

Some useful constructs, others here: https://www.w3.org/TR/owl-time/#topology, see the Interval Relations.

• time:inXSDDateTimeStamp
• time:hasDuration
• time:before
• time:after
• time:intervalDuring

vf defines property chain axioms for vf:hasBeginning , vf:hasEnd, and vf:hasPointInTime as slight variant of Alignment of PROV-O with OWL-Time.

GEO

https://www.w3.org/2003/01/geo/wgs84_pos#

• geo:lat
• geo:long
• geo:alt

DCTERMS

http://purl.org/dc/terms/

• dcterms:created