Hi Karen,

Steve is not wrong, but I think you are talking about two different things.

Using a string with a Relators property would not conform to how they have been defined at ID.LOC.GOV.  So, the answer to your specific question is: no, it is not our expectation Relator URIs would be used as properties with the object of the triple being either a URI or a string.  Only URIs.

But the Relators URIs have also been defined such that they can be used as a Property or as an Object, which is what Steve was driving at.  We use them as Objects in Bibframe, hence their (additional) typing as a bf:Role.  

HTH,
Kevin

--
Kevin Ford
Network Development and MARC Standards Office
Library of Congress
Washington, DC


-----Original Message-----
From: Code for Libraries <[log in to unmask]> On Behalf Of Karen Coyle
Sent: Friday, October 20, 2023 11:41 AM
To: [log in to unmask]
Subject: Re: [CODE4LIB] [External] [CODE4LIB] Question about multiple declarations

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Steve, the list doesn't need to hear this, but you are not correct here.
The relators are defined as owl:ObjectProperties (not just "properties") which means that they cannot take text as objects. However, I want LoC to confirm that, because this is their doing.

kc


On 10/17/23 8:17 AM, McDonald, Stephen wrote:
> It is an inherent problem when creating a vocabulary--should this set of traits be properties or types? Whichever choice you make, you face the problem that other vocabularies may choose differently. I believe this vocabulary defines relators as properties. But they also want to show how the terms are related to terms in OWL and BIBFRAME where they are defined as types.
>
>                                       Steve McDonald
>                                       [log in to unmask]
>
>
>> -----Original Message-----
>> From: Code for Libraries <[log in to unmask]> On Behalf Of Karen 
>> Coyle
>> Sent: Tuesday, October 17, 2023 10:40 AM
>> To: [log in to unmask]
>> Subject: Re: [CODE4LIB] [External] [CODE4LIB] Question about multiple 
>> declarations
>>
>> tl;dr: Does LoC intend that its relator properties be used with both 
>> "thing" and "string" objects?
>>
>> kc
>>
>>
>> On 10/10/23 8:02 AM, McDonald, Stephen wrote:
>>> That is not correct.  The statement
>>>    <rdfs:subPropertyOf
>>>    rdf:resource="http://purl.org/dc/elements/1.1/contributor"/>
>>>
>>> is a single predicate-object statement, enclosed within angle brackets.
>>> The following statement
>>> <rdf:type
>>> rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
>>>
>>> is also separate statement, enclosed within angle brackets. The OWL
>> statement is not part of the subPropertyOf statement. The next 
>> statement is also a separate statement. So we have three statements:
>>> subPropertyOf: DC contributor
>>> type: owl ObjectProperty
>>> type: BIBFRAME role
>>>
>>> The term you were looking up is the implied subject of the 
>>> statements,
>> making these RDF triples.
>>>                                     Steve McDonald
>>>                                     [log in to unmask]
>>>
>>>
>>>> -----Original Message-----
>>>> From: Code for Libraries <[log in to unmask]> On Behalf Of 
>>>> Karen Coyle
>>>> Sent: Monday, October 9, 2023 5:36 PM
>>>> To: [log in to unmask]
>>>> Subject: [External] [CODE4LIB] Question about multiple declarations
>>>>
>>>> All,
>>>>
>>>> I am looking at the LoC relators at id.loc.gov, and am trying to 
>>>> understand the implications of the multiple declarations for relator terms.
>>>>
>>>> <rdfs:subPropertyOf
>>>> rdf:resource="http://purl.org/dc/elements/1.1/contributor"/>
>>>> <rdf:type
>>>> rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
>>>> <rdf:type 
>>>> rdf:resource="http://id.loc.gov/ontologies/bibframe/Role"/>
>>>>
>>>> dct:contributor is not an Object Property; there is no object type 
>>>> given, so I suppose it is de facto an Annotation Property. I read 
>>>> the next statement as narrowing, so at statement 2 we have:
>>>>      subproperty of dct:contributor AND an owl:ObjectProperty
>>>>
>>>> If my reading is correct, it would be a violation of this to use 
>>>> the relator with a string rather than a thing.
>>>>
>>>> (Stop me here if I'm wrong.)
>>>>
>>>> Then the 3rd statement appears to say that the relator is a 
>>>> bf:Role, which is a BIBFRAME-specific class. I can't wrap my head 
>>>> around the functionality of this statement and would love a brief explanation.
>>>> I'm undoubtedly not into BIBFRAME deep enough to grok this.
>>>>
>>>> Also, my reading is that each relator is ALL THREE OF THESE; this 
>>>> is an AND not at OR. Right?
>>>>
>>>> Thanks for any help,
>>>> kc
>>>>
>>>> --
>>>> Karen Coyle
>>>> [log in to unmask] 
>>>> https://urldefense.com/v3/__http://kcoyle.net__;!!EDx7F7x-0XSOB8YS_
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>>>> skype: kcoylenet/+1-510-984-3600
>>>>
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>> Karen Coyle
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--
Karen Coyle
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