When trying to publish data on the Databus, the HTTP API accepts not only fully complete JSON-LD DataIds as input. Some properties of the JSON-LD input are allowed to be omitted as they can be inferred from others.
Properties
The following table shows a list of inferrable properties that can optionally be omitted in the input.
Version
Property
Value inferred from
dataid:publisher
@id of databus:Version
databus:group
@id of databus:Version
databus:artifact
@id of databus:Version
dct:hasVersion
@id of databus:Version
dct:abstract
First line of dct:description
dct:issued
current time
dct:modified
current time (always set by server)
Part
Property
Value inferred from
@id
@id of databus:Version, databus:formatExtension, databus:compression and content variants (i.e. properties with prefix https://dataid.dbpedia.org/databus-cv#)
databus:formatExtension
content-disposition header of file specified with dcat:downloadURL (if present). Alternatively: String value of dcat:downloadURL
databus:compression
content-disposition header of file specified with dcat:downloadURL (if present). Alternatively: String value of dcat:downloadURL
dataid:shasum
sha256sum of the file specified with dcat:downloadURL
dataid:byteSize
size of the file specified with dcat:downloadURL
dct:hasVersion
dct:hasVersion of associated databus:Version
properties with prefix https://dataid.dbpedia.org/databus-cv#
Only set if the property is used in any other databus:Part of the databus:Version. Value is set to empty string.
Additional Graphs
The following table lists the additional graphs that can be generated by the Databus automatically:
Type
Inferred from
databus:Artifact
databus:artifact of databus:Version
databus:Group
databus:group of databus:Group.
rdf:Property with rdfs:subPropertyOf databus:contentVariant
all properties starting with dcv:
Example
API Input
{"@context":"https://downloads.dbpedia.org/databus/context.jsonld","@graph": [ {"@type": ["Version","Dataset" ],"@id":"https://databus.example.org/janfo/examples/example_one/2023-03-08","title":"My Title","description":"This is my description","license":"http://dalicc.net/licenselibrary/AdaptivePublicLicense10","distribution": [ {"@type":"Part","downloadURL":"https://holycrab13.github.io/webid.ttl" }, {"@type":"Part","downloadURL":"https://holycrab13.github.io/webid.ttl","dcv:tag":"asdf" }, {"@type":"Part","downloadURL":"https://holycrab13.github.io/webid.ttl","dcv:tag":"hallo" } ] } ]}
Auto-Completed Input
{"@context":"https://downloads.dbpedia.org/databus/context.jsonld","@graph": [ {"@id":"https://databus.example.org/janfo/examples/example_one/2023-03-08","@type": ["databus:Version","Dataset" ],"artifact":"https://databus.example.org/janfo/examples/example_one","group":"https://databus.example.org/janfo/examples","abstract":"This is my description","description":"This is my description","hasVersion":"2023-03-08","issued":"2023-03-15T14:08:44.413Z","license":"http://dalicc.net/licenselibrary/AdaptivePublicLicense10","modified":"2023-03-15T14:08:44.413Z","publisher":"https://databus.example.org/janfo#this","title":"My Title","distribution": ["https://databus.example.org/janfo/examples/example_one/2023-03-08#example_one_tag=hallo","https://databus.example.org/janfo/examples/example_one/2023-03-08#example_one","https://databus.example.org/janfo/examples/example_one/2023-03-08#example_one_tag=asdf" ] }, {"@id":"https://databus.example.org/janfo/examples/example_one/2023-03-08#example_one_tag=hallo","@type":"Part","compression":"none","file":"https://databus.example.org/janfo/examples/example_one/2023-03-08/example_one_tag=hallo","formatExtension":"ttl","sha256sum":"d61a05ca4810367f361f17500304a168aab27a3119c93a18c00bce1775dfd6b1","dcv:tag":"hallo","hasVersion":"2023-03-08","issued":"2023-03-15T14:08:44.413Z","modified":"2023-03-15T14:08:44.413Z","byteSize":2730,"downloadURL":"https://holycrab13.github.io/webid.ttl" }, {"@id":"https://databus.example.org/janfo/examples/example_one/2023-03-08#example_one","@type":"Part","compression":"none","file":"https://databus.example.org/janfo/examples/example_one/2023-03-08/example_one","formatExtension":"ttl","sha256sum":"d61a05ca4810367f361f17500304a168aab27a3119c93a18c00bce1775dfd6b1","dcv:tag":"","hasVersion":"2023-03-08","issued":"2023-03-15T14:08:44.413Z","modified":"2023-03-15T14:08:44.413Z","byteSize":2730,"downloadURL":"https://holycrab13.github.io/webid.ttl" }, {"@id":"https://databus.example.org/janfo/examples/example_one/2023-03-08#example_one_tag=asdf","@type":"Part","compression":"none","file":"https://databus.example.org/janfo/examples/example_one/2023-03-08/example_one_tag=asdf","formatExtension":"ttl","sha256sum":"d61a05ca4810367f361f17500304a168aab27a3119c93a18c00bce1775dfd6b1","dcv:tag":"asdf","hasVersion":"2023-03-08","issued":"2023-03-15T14:08:44.413Z","modified":"2023-03-15T14:08:44.413Z","byteSize":2730,"downloadURL":"https://holycrab13.github.io/webid.ttl" }, {"@id":"https://databus.example.org/janfo/examples/example_one","@type":"Artifact" }, {"@id":"https://databus.example.org/janfo/examples","@type":"Group" }, {"@id":"dcv:tag","@type":"http://www.w3.org/1999/02/22-rdf-syntax-ns#Property","subPropertyOf":"databus:contentVariant" } ]}