afs commented on issue #2473:
URL: https://github.com/apache/jena/issues/2473#issuecomment-2118871307
Some interesting points in those docs about the differences.
* `rdf:ID`, `rdf:about` -- syntax oriented, needs to hook into the parser.
But if there is to be CIM/JSON-LD, then the distinction ought to be ignored or
converted to a property because it is an RDF/XML specific feature.
* `xml:base` -- This can be addressed in processing parser output with an
`RDFStream` on the way to the model for storage. Uses a URI with private scheme
e.g. `base:` as a marker. Teh data then has relative URIs/. Use with care!
* Schema-defined datatyping. Very much inspired by XML!
It can be done by feeding the parse output to an `RDFStream` that looks
for the properties with schema-defined datatype and converting the triple
object from string to the datatype.
---
One way to encode the difference is use named graphs: if for JSON-LD, then
using a blank node graph name is natural. This is using RDF datasets as
"packages of graphs" - the default graph is the manifest and main data, the
named graphs are sets of triples referred to from the default graph.
However, there isn't a standard dataset/quads syntax based on XML. (TriX is
a sort of de-facto standard but it isn't pretty.)
Based on the package idea, there is always a zip file with named files as
named graphs. Not "a standard" but it only needs basic, common tools to work
with.
```
=== Quads
{
"@graph": [
{
"@id": "cim:_248c809d-1d7b-397c-830f-6928007ae6d9",
"md:Model.created": "2024-05-13T08:37:06.830Z",
"cim:Model.differenceTo": "2027-10-01T08:37:06.779475Z",
"md:Model.version": "1715589426",
"cim:Model.differenceFrom": "2024-04-01T07:55:06.779475Z",
"cim:Model.modelVersionIri":
"http://ontology.adms.ru/UIP/md/2021-1";,
"dm:forwardDifferences": "_:b0",
"dm:reverseDifferences": {
"@value": "\n ",
"@type": "rdf:XMLLiteral"
},
"@type": "dm:DifferenceModel",
"md:Model.scenarioTime": "2024-05-13T08:37:06.830Z",
"md:Model.modelingAuthoritySet": "unknown",
"md:Model.profile": "http://profile/";
},
{
"@id": "_:b0",
"@graph": [
{
"@id": "cim:_individual-D-1",
"@type": "cim:D"
},
{
"@id": "cim:_individual-A-1",
"cim:A-2-B": {
"@id": "cim:_individual-B-1"
},
"@type": "cim:A"
},
{
"@id": "cim:_individual-B-1",
"@type": "cim:B"
}
]
}
],
"@context": {
"dm": "http://iec.ch/2002/schema/CIM_difference_model#";,
"rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#";,
"cim": "http://iec.ch/TC57/2014/CIM-schema-cim16#";,
"meta": "http://iec.ch/TC57/2014/CIM-schema-cim16#";,
"md": "http://iec.ch/TC57/61970-552/ModelDescription/1#";
}
}
```
TriG:
```
PREFIX cim: <http://iec.ch/TC57/2014/CIM-schema-cim16#>
PREFIX dm: <http://iec.ch/2002/schema/CIM_difference_model#>
PREFIX md: <http://iec.ch/TC57/61970-552/ModelDescription/1#>
PREFIX meta: <http://iec.ch/TC57/2014/CIM-schema-cim16#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
cim:_248c809d-1d7b-397c-830f-6928007ae6d9
rdf:type dm:DifferenceModel;
dm:forwardDifferences _:b0;
dm:reverseDifferences "\n "^^rdf:XMLLiteral;
cim:Model.differenceFrom "2024-04-01T07:55:06.779475Z";
cim:Model.differenceTo "2027-10-01T08:37:06.779475Z";
cim:Model.modelVersionIri
"http://ontology.adms.ru/UIP/md/2021-1";;
md:Model.created "2024-05-13T08:37:06.830Z";
md:Model.modelingAuthoritySet "unknown";
md:Model.profile "http://profile/";;
md:Model.scenarioTime "2024-05-13T08:37:06.830Z";
md:Model.version "1715589426" .
_:b0 {
cim:_individual-D-1
rdf:type cim:D .
cim:_individual-A-1
rdf:type cim:A;
cim:A-2-B cim:_individual-B-1 .
cim:_individual-B-1
rdf:type cim:B .
}
```
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