- From: simon via GitHub <sysbot+gh@w3.org>
- Date: Fri, 13 Oct 2017 07:58:51 +0000
- To: public-poe-archives@w3.org
simonstey has just labeled an issue for https://github.com/w3c/poe as "Editorial":
== JSON-LD serialization of rightOperand values ==
**Preliminaries:**
Values of property `odrl:rightOperand` can be literals or IRIs:
> one rightOperand property value of type:
> + **literal, or IRI** [rfc3987], or RightOperand; or
> + for set-based operators; list of literals, or list of IRIs [rfc3987], or list of RightOperands;
http://www.w3.org/ns/odrl.jsonld :
> `"rightOperand": "odrl:rightOperand",`
-------------
**Problem:**
By default, all JSON-LD values are interpreted as strings (cf. https://github.com/schemaorg/schemaorg/issues/51) ->
```json
{
"@context": "http://www.w3.org/ns/odrl.jsonld",
"@type": "Offer",
"uid": "http://example.com/policy:88",
"profile": "http://example.com/odrl:profile:09",
"permission": [{
"assigner": "http://example.com/assigner:sony",
"target": "http://example.com/music/1999.mp3",
"action": "play",
"duty": [{
"action": [{
"rdf:value": { "@id": "odrl:compensate" },
"refinement": [{
"leftOperand": "payAmount",
"operator": "eq",
"rightOperand": "5.00",
"unit": "http://dbpedia.org/resource/Euro"
}]
}],
"constraint": [{
"leftOperand": "event",
"operator": "lt",
"rightOperand": "policyUsage"
}]
}]
}]
}
```
-->
```turtle
<http://example.com/policy:88> a odrl:Offer ;
odrl:permission [ odrl:action odrl:play ;
odrl:assigner <http://example.com/assigner:sony> ;
odrl:duty [ odrl:action [ rdf:value odrl:compensate ;
odrl:refinement [ odrl:leftOperand odrl:payAmount ;
odrl:operator odrl:eq ;
odrl:rightOperand "5.00" ;
odrl:unit "http://dbpedia.org/resource/Euro" ] ] ;
odrl:constraint [ odrl:leftOperand odrl:event ;
odrl:operator odrl:lt ;
odrl:rightOperand "policyUsage" ] ] ;
odrl:target <http://example.com/music/1999.mp3> ] ;
odrl:profile <http://example.com/odrl:profile:09> .
```
-------------
**Solution:**
>From https://github.com/schemaorg/schemaorg/issues/51#issuecomment-284874600:
> I think in this situation, it seems safest to always stay explicit and always use
> + `{ "@id": "https://foo.example/" }`
> + `{ "@value": "bar" }`
>
> and don't rely on schema.org JSON-LD context having or not having "@type": "@id"
```json
{
"@context": "http://www.w3.org/ns/odrl.jsonld",
"@type": "Offer",
"uid": "http://example.com/policy:88",
"profile": "http://example.com/odrl:profile:09",
"permission": [{
"assigner": "http://example.com/assigner:sony",
"target": "http://example.com/music/1999.mp3",
"action": "play",
"duty": [{
"action": [{
"rdf:value": {
"@id": "odrl:compensate"
},
"refinement": [{
"leftOperand": "payAmount",
"operator": "eq",
"rightOperand": {
"@value": "5.00",
"@type": "xsd:decimal"
},
"unit": "http://dbpedia.org/resource/Euro"
}]
}],
"constraint": [{
"leftOperand": "event",
"operator": "lt",
"rightOperand": {
"@id": "odrl:policyUsage"
}
}]
}]
}]
}
```
-->
```turtle
<http://example.com/policy:88> a odrl:Offer ;
odrl:permission [ odrl:action odrl:play ;
odrl:assigner <http://example.com/assigner:sony> ;
odrl:duty [ odrl:action [ rdf:value odrl:compensate ;
odrl:refinement [ odrl:leftOperand odrl:payAmount ;
odrl:operator odrl:eq ;
odrl:rightOperand 5.00 ;
odrl:unit "http://dbpedia.org/resource/Euro" ] ] ;
odrl:constraint [ odrl:leftOperand odrl:event ;
odrl:operator odrl:lt ;
odrl:rightOperand odrl:policyUsage ] ] ;
odrl:target <http://example.com/music/1999.mp3> ] ;
odrl:profile <http://example.com/odrl:profile:09> .
```
See https://github.com/w3c/poe/issues/279
Received on Friday, 13 October 2017 07:58:39 UTC