> On 28 Nov 2023, at 3:08 pm, Davide Sottara <dso...@gmail.com> wrote:
>
> I have put together a simple ontology with a class hierarchy, a property on
> each class, and one individual per class - attached
> AAA
> DDD
> BBB
> CCC
Thanks for the file, which I was able to play with. I also tried something like
{
aaas {
uri
... on BBB {
propA
}
}
}
but since the schema doesn't know the relationships between AAA and BBB this
doesn't work. All types in the generated schemas are independent, no implements
or such.
>
> I was looking for a behavior that replicates unions or interfaces:
> https://www.apollographql.com/docs/apollo-server/schema/unions-interfaces/
>
> In fact, have tried setting graphql:isInterface = true, but that does not
> seem to have any effect?
graphql:isInterface is only used for round-tripping GraphQL Schema files from
elsewhere, not those that are auto-generated.
So I am afraid this syntax isn't working and you may need to revert to other
technologies like SPARQL or ADS JavaScript to formulate such queries.
Holger
>
> Thank you for any insight\
> Davide
>
> On Wednesday, November 22, 2023 at 1:44:58 AM UTC-6 Holger Knublauch wrote:
>> Hi Davide,
>>
>> thanks for the error message. I had to read up on GraphQL fragments as I
>> have never used them.
>> It seems that they would need to be declared using the fragment keyword but
>> I don't see that in your query.
>> Our GraphQL engine does not declare such fragments automatically.
>>
>> It would streamline this discussion if we had a complete, self-contained
>> example.
>>
>> Thanks
>> Holger
>>
>>
>>
>>> On 22 Nov 2023, at 3:59 am, Davide Sottara <dso...@gmail.com <>> wrote:
>>>
>>
>>> Unfortunately I get an error
>>> "Fragment cannot be spread here as objects of type (super) can never be of
>>> type (sub)
>>>
>>> On Tuesday, November 21, 2023 at 2:55:51 PM UTC-6 Holger Knublauch wrote:
>>>> Have you tried it out? What happened?
>>>>
>>>> Holger
>>>>
>>>>
>>>>
>>>>> On 21 Nov 2023, at 5:35 am, Davide Sottara <dso...@gmail.com <>> wrote:
>>>>>
>>>>
>>>>> I have a class hierarchy, where the classes are also node shapes with
>>>>> property shapes
>>>>>
>>>>> class AA
>>>>> propA :String
>>>>>
>>>>> class BB subClassOf AA
>>>>> propB : String
>>>>>
>>>>> Is a query like the following supported?
>>>>>
>>>>> aaas {
>>>>> propA
>>>>> ... on bbb {
>>>>> propB
>>>>> }
>>>>> }
>>>>>
>>>>> Thank you
>>>>>
>>>>
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> <HierarchicalDataGraphTest.trig>
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