2024-01-13 04:11:37 +00:00
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# linkml-activitypub
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2024-01-13 07:27:16 +00:00
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LinkML representation of ActivityPub schema (which is mostly ActivityStreams except where it's not)
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2024-01-13 11:23:50 +00:00
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https://pypi.org/projects/linkml-activitypub
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2024-01-13 07:27:16 +00:00
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## Process
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Intermediate files are in the `data` directory
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- `activitystreams2.owl` - Initially imported from [activitystreams2.owl](https://github.com/w3c/activitystreams/blob/5910a59a6f46c1f8ec9fb028bd8bbb65a7332e4e/vocabulary/activitystreams2.owl)
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- Removed problematic OrderedCollection definitions
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- `activitystreams2.ofn` - Convert to functional notation with [robot](http://robot.obolibrary.org/)
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- `activitystreams2.yaml` - Then to rough linkml using [schema-automator](https://linkml.io/schema-automator/)
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2024-01-13 10:10:53 +00:00
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Then the final schema in `linkml_activitypub/activitypub.yaml`:
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- Reorder to match ActivityStreams
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- Ensure correct
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- inheritance
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- `multivalued`
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- Prune extra properties and classes to match those in [ActivityStreams2](https://www.w3.org/TR/activitystreams-vocabulary/) normative definition
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- Then re-add the ones that declare a class in their domain, even if the class doesn't list that property in its definition
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- Except for those types that seem to be metaclasses:
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- `attributedTo` (-> `actor`)
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- Added LinkML properties (where needed):
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- Classes
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- `disjoint_with`
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- `see_also` when references given
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- Properties
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- `description`
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- `domain`
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- `range`
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- `minumum_value`
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- `maximum_value`
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- Added missing slots
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- `closed`
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- `startIndex`
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- Handle special property cases
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- `items` is marked as `list_elements_ordered: true` on `OrderedCollection` and false on `Collection`
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- Made types
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- anyURI as `xsd:anyURI`, did not try and find a validator pattern. The spec alternatingly uses its own anyURI prop and `xsd:anyURI`
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2024-01-13 11:23:50 +00:00
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- `duration` as a string that indicates it's a `xsd:duration`, finding a pattern is TODO
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2024-01-13 10:10:53 +00:00
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- Made enums
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- `unitEnum` - for `unit`
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- Copied Notes to class `description` rather than `comments`
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- Added schema prefixes:
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- `schema`: https://schema.org/ - for specifying IETF BCP 47 language codes
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## Notes
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Need properties...
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## Errata
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- `OrderedCollectionPage` is not a subclass of, and doesn't mix in `CollectionPage` since it would then have an ambiguous
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class definition, since `OrderedCollection` inherits from `Collection` but asserts that the `list_items_ordered` slot is `true`
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rather than `false`. Instead, the slots from `CollectionPage` are just duplicated.
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- Accordingly, the domain and range of slots that include `CollectionPage` also include `OrderedCollectionPage
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2024-01-13 11:23:50 +00:00
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- Need to implement some `xsd:duration` pattern
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2024-01-13 07:27:16 +00:00
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# References
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- Status of AS OWL vocabulary and etc. https://github.com/w3c/activitystreams/issues/416
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# See Also
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- https://github.com/steve-bate/activitypub-ontology
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