The xro:timeOfConversion attribute of an xro:ExchangeRateInfo class is determined by a timestamp of the last currency conversion.
time of conversion
Martin Hepp and Bene Rodriguez-Castro
V2.0, Release 09-04-2013
Exchange rate ontology for Linked Data currency conversion.
The following conceptual diagram in UML outlines the model described by the ontology at hand:
<img src="xro-uml.png" alt="UML diagram" />
Exchange Rate Ontology
Exchange Rate Ontology
Alex Stolz
This property adds a counter currency to the xro:ExchangeRateInfo class. The expected range value for this property is a DBPedia currency class.
You can obtain a list of all currency instances in the DBPedia dataset by clicking on the following link: <a href="http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=select+distinct+%3Fs%2C+%3Fcode%0D%0Awhere+%7B%0D%0A++%3Fs+a+dbpedia-owl%3ACurrency+.%0D%0A++%3Fs+dbpprop%3AisoCode+%3Fcode+.%0D%0A%7D&format=text%2Fhtml&timeout=0&debug=on">click me</a>.
counter
The xro:inverseRate property describes the exchange rate of a given currency pair, meaning that 1 unit of the counter currency is exchanged for X units of the base currency. The xro:inverseRate property denotes the inverse of the xro:rate property.
inverse rate
The xro:rate property describes the exchange rate of a given currency pair, meaning that 1 unit of the base currency is exchanged for X units of the counter currency.
rate
This property adds a base currency to the xro:ExchangeRateInfo class. The expected range value for this property is a DBPedia currency class.
You can obtain a list of all currency instances in the DBPedia dataset by clicking on the following link: <a href="http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=select+distinct+%3Fs%2C+%3Fcode%0D%0Awhere+%7B%0D%0A++%3Fs+a+dbpedia-owl%3ACurrency+.%0D%0A++%3Fs+dbpprop%3AisoCode+%3Fcode+.%0D%0A%7D&format=text%2Fhtml&timeout=0&debug=on">click me</a>.
base
This property describes the publisher of the given exchange rate.
publisher
Describes the currency exchange rates between a currency pair, consisting of a base currency (e.g. USD) and a counter currency (e.g. EUR). The class further specifies attributes for the time of conversion, the currency rate, the inverse of the currency rate, and human-readable meta descriptions encoded in rdfs:label and rdfs:comment.
If applicable, it is recommended to use dcterms:source to link from the xro:ExchangeRateInfo object to the URI of the currency conversion API that was responsible for the generation of the respective exchange rate.
Exchange Rate Info