Re: is overloading of leftOperand possible using dataType pertaining to rightOperand ?

Hi Sridhar,

 

All left operands are an instance of odrl:LeftOperand. You can create a new one that inherits from this class

 

odrl:leftOperand odrl:deliveryChannel

 

                could become

 

                odrl:leftOperand amg:RequiredNewLeftOperand 

 

As long as your ontology extension declares somewhere that 

 

     amg:RequiredNewLeftOperand a odrl:LeftOperand

 

When you are evaluating the RightOperand, now you can use the new definition of the LeftOperand to determine what are your conditions connected to the operator used. 

 

Alternatively (I am extrapolating from your brief example, so likely to be wrong):
you could think that your dc and lc classes should inherit from a single root and you can evaluate them by specialisation.
your dc and lc are properties of the Asset (rather than classes), and your refinement is related to the Asset (since there’s no full context, not sure if that’s the purpose of the entire policy/rules).
your dc and lc  are instances of AssetCollections that ‘contain’ your asset:
 

VOD ----------------|

STARMOVIES ------------------> Asset

MOVIESNOW ----------|

 

They probably would produce a similar output at the constraint level output, but in the first case, there’s no (evident direct) connection to the asset.

 

Hope this helps,

___________________________________

Joshua Cornejo

marketdata

embed open standards 

across your supply chain

 

From: Sridhar Krishnamurthy <ksridhar@amagi.com>
Date: Friday 15 March 2024 at 13:03
To: <public-odrl@w3.org>
Subject: is overloading of leftOperand possible using dataType pertaining to rightOperand ?
Resent-From: <public-odrl@w3.org>
Resent-Date: Fri, 15 Mar 2024 13:03:43 +0000

 

Respected Madam/Sir,

 

Given that there are just a handful of leftOperands as specified in

https://www.w3.org/TR/odrl-vocab/#constraintRelationalOperators and

absorbed by a profile such as 

https://iptc.org/std/RightsML/2.0/RightsML_2.0-specification.html

is it possible to overload a leftOperand using the dataType of the rightOperand ?

(Reference : https://www.w3.org/TR/odrl-model/#constraint-class)

 

In the following example(s), deliveryChannel is the only leftOperand whose

semantics come close to what is needed to specify 

(a) the delivery type or

(b) linear channel (names)

 

Example for (a) :

 

odrl:constraint [

    odrl:leftOperand odrl:deliveryChannel ;
    odrl:operator odrl:eq ;
    odrl:rightOperand <http://www.amagi.com/metadata/ontologies/media/dc#_VOD> ;

    odrl:dataType amg:dc ;
] ;

 

Example for (b) :

 

odrl:constraint [

    odrl:leftOperand odrl:deliveryChannel ;
    odrl:operator odrl:isAnyOf ;
    odrl:rightOperand (
         <http://www.amagi.com/metadata/ontologies/media/lc#_STARMOVIES>
         <http://www.amagi.com/metadata/ontologies/media/lc#_MOVIESNOW>
     ) ;
     odrl:dataType amg:lc ;
] ;

 

thanks and regards

 

 


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