- Created by E. Lynette Rayle, last modified on Jul 20, 2021
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Overview
This proposes a change document structure using Activity Streams. It includes examples for each type of change.
Activity Streams
References:
Specification for Activity Stream 2.0
Sidecar specification describing activity types (e.g. add, delete, etc.)
Add Example:
Add a single triple Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> 'milk'@en."
}
Add an entity with multiple triples Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/cow_milk> <http://my.authority/vocab/hasLabel> 'cow milk'@en.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/broader_term> <http://my_repo/entity/milk>.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/narrow_term> <http://my_repo/entity/bovine_milk>. }
Add an entity with a blank node Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> b1:.
<b1:> <http://my.authority/vocab/label> 'milk'@en."
}
Delete Example:
Delete a single triple Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> 'milk'@en."
}
Delete an entity with multiple triples Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term cow milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/cow_milk> <http://my.authority/vocab/hasLabel> 'cow milk'@en.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/broader_term> <http://my_repo/entity/milk>.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/narrow_term> <http://my_repo/entity/bovine_milk>. }
Delete a triple with blank node Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> b1:.
<b1:> <http://my.authority/vocab/label> "milk"@en."
}
Deprecate Example:
Delete a single triple Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Deprecate term milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> 'milk'@en."
}
Delete an entity with multiple triples Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term cow milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/cow_milk> <http://my.authority/vocab/hasLabel> 'cow milk'@en.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/broader_term> <http://my_repo/entity/milk>.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/narrow_term> <http://my_repo/entity/bovine_milk>. }
Delete a triple with blank node Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> b1:.
<b1:> <http://my.authority/vocab/label> "milk"@en."
}
Change Example:
Change a single triple Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> 'milk'@en."
}
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term Milk as a replacement of term milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> 'Milk'@en"
}
Change multiple triples for an entity at once Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete narrower terms for milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/cow_milk> <http://my.authority/vocab/narrow_term> 'bovine milk'@en.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/narrow_term> 'oxen milk'@en."
}
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add narrower terms for milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/cow_milk> <http://my.authority/vocab/narrow_term> 'Bovine milk'@en.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/narrow_term> 'Oxen milk'@en."
}
Change a term with blank node intermediary Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> b1:.
<b1:> <http://my.authority/vocab/label> 'milk'@en."}
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term Milk as a replacement of term milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> b2:.
<b2:> <http://my.authority/vocab/label> 'milk'@en."}
}
Split Example:
Split an entity with a single triple into two entities Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term cow milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority" },
"graph": "<http://my_repo/entity/cow_milk> <http://my.authority/vocab/hasLabel> 'cow milk'@en."
}
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term bovine milk split from cow milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/bovine_milk> <http://my.authority/vocab/hasLabel> 'bovine milk'@en."
}
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term oxen milk split from cow milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/oxen_milk> <http://my.authority/vocab/hasLabel> 'oxen milk'@en"
}
Split an entity with multiple triples into two entities Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term cow milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority" },
"graph": "<http://my_repo/entity/cow_milk> <http://my.authority/vocab/hasLabel> 'cow milk'@en.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/altLabel> <http://my_repo/entity/bovine_milk>.
<http://my_repo/entity/cow_milk> <http://my.authority/vocab/altLabel> <http://my_repo/entity/oxen_milk>. }}
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term bovine milk split from cow milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/bovine_milk> <http://my.authority/vocab/hasLabel> 'bovine milk'@en."
}
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term oxen milk split from cow milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/oxen_milk> <http://my.authority/vocab/hasLabel> 'oxen milk'@en"
}
Change a term with blank node intermediary Expand source
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Delete term milk",
"type": "Delete",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> b1:.
<b1:> <http://my.authority/vocab/label> 'milk'@en."}
{
"@context": "https://www.w3.org/ns/activitystreams",
"summary": "Add term Milk as a replacement of term milk",
"type": "Add",
"actor": {
"type": "Authority",
"id": "http://my.authority",
"name": "My Authority"
},
"graph": "<http://my_repo/entity/milk> <http://my.authority/vocab/hasLabel> b2:.
<b2:> <http://my.authority/vocab/label> 'milk'@en."}}
RDF Diff
- Provides info on several tools that (for the most part) compare 2 graphs and report on differences (https://www.w3.org/2001/sw/wiki/How_to_diff_RDF)
RDF*
Specification (draft) of RDF* and SPARQL* - https://w3c.github.io/rdf-star/cg-spec/editors_draft.html
Other Refs
- High level description and examples - https://enterprise-knowledge.com/rdf-what-is-it-and-why-do-i-need-it/
IIIF Change Discovery
Specification: https://iiif.io/api/discovery/0.9/
Uses ActivityStreams
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