Re: how to determine source type for a specific resource

Hi Thomas,

I'd suggest something like a combination of Example 29 and Example 70 from the Web Annotation Vocabulary spec:
Example 29: https://www.w3.org/TR/annotation-vocab/#example_hasSource
Example 70: https://www.w3.org/TR/annotation-vocab/#example_dctypes_stillImage

```turtle
@prefix oa: <http://www.w3.org/ns/oa#> .
@prefix dctypes: <http://purl.org/dc/dcmitype/> .

# example 29
<http://example.org/anno28> a oa:Annotation ;
    oa:hasBody <http://example.org/comment1> ;
    oa:hasTarget <http://example.org/region1> .

<http://example.org/region1> a oa:SpecificResource ;
    oa:hasSource <http://example.org/image1> .

# last line of example 70
<http://example.org/image1> a dctypes:StillImage .
```

or in JSON-LD
```json
{
  "@context": "http://www.w3.org/ns/anno.jsonld",
  "@graph": [
    {
      "id": "http://example.org/anno28",
      "type": "Annotation",
      "body": "http://example.org/comment1",
      "target": "http://example.org/region1"
    },
    {
      "id": "http://example.org/image1",
      "type": "Image"
    },
    {
      "id": "http://example.org/region1",
      "type": "SpecificResource",
      "source": "http://example.org/image1"
    }
  ]
}
```

Does that get you where you want to go? Or do you want/need something more compact than that `@graph` approach?

Cheers!
Benjamin


--

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http://linkedin.com/in/benjaminyoung

________________________________
From: Thomas Kurz <thomas.kurz@redlink.at>
Sent: Wednesday, April 21, 2021 8:27 AM
To: public-openannotation@w3.org <public-openannotation@w3.org>
Subject: how to determine source type for a specific resource


Hi!



I am aiming to implement a annotation framework using OA model. As it seems to be common (at least at the recommendation examples) to set a specific type to the target (e.g dct:Image, dct:Text etc)

I wonder how to set the type of the oa:hasSource of a oa:SpecificResource? Any ideas on that?



Thanks in advance for your hints!

Thomas





---

Dr. Thomas Kurz
CTO / CEO

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