JSON-LD metadata application profiles

[NicolasCARPi]

Application profile: a set of inputs with defined terms recognized by all.

Links:

• https://git.rwth-aachen.de/coscine : RDM framework
• https://git.rwth-aachen.de/coscine/graphs/applicationprofiles
• https://www.w3.org/TR/shacl/

[MattGroenewald]

Here is the form generator I mentioned.

https://git.rwth-aachen.de/coscine/frontend/libraries/form-generator

As well as a demo:

https://coscine.rwth-aachen.de/coscine/apps/formgeneratordemo/

In the AIMS project we are working on providing a user-friendly platform for generating compatible metadata application profiles.
JSON-LD is one of the supported output formats.

Resulting shapes can become quite complex. First step could be only to be able to pick the relevant parts of it for ELN metadata ignoring the rest.

Example below as ttl and JSON-LDfor a shape describing a "parameter" that can the as a building block be used to build full schemas. To be clear this is nothing a ELN user should be concerned about. Also this is work in progress, so terms are not final and some elements might be subject to change but should illustrated the basic structure.

Turtle: (more human-readable)

@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <http://schema.org/> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#ParameterShape> a sh:NodeShape ;
	rdfs:label "parameter" ;
	sh:property [
		sh:path <http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#dimension> ;
		sh:maxCount 1 ;
		sh:name "mathemcatical dimension"@en ;
		sh:datatype qudt:IntegerList ;
		sh:minCount 1 ;
	], [
		sh:path <http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#datatype> ;
		sh:maxCount 1 ;
		sh:name "datatype"@en ;
		sh:minCount 1 ;
		sh:class xsd:anyType ;
	], [
		sh:path schema:value ;
		sh:maxCount 1 ;
		sh:name "value"@en ;
		sh:datatype xsd:anyType ;
		sh:minCount 1 ;
	], [
		sh:path <http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#unit> ;
		sh:maxCount 1 ;
		sh:name "unit"@en ;
		sh:datatype qudt:Unit ;
		sh:minCount 1 ;
	] ;
	sh:targetClass <http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#Parameter> .`

JSON-LD:

{
    "@context": {
        "qudt": "http://qudt.org/schema/qudt/", 
        "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#", 
        "rdfs": "http://www.w3.org/2000/01/rdf-schema#", 
        "schema": "http://schema.org/", 
        "sh": "http://www.w3.org/ns/shacl#", 
        "xsd": "http://www.w3.org/2001/XMLSchema#"
    }, 
    "@graph": [
        {
            "@id": "_:n3-50", 
            "sh:datatype": {
                "@id": "qudt:IntegerList"
            }, 
            "sh:maxCount": {
                "@type": "xsd:integer", 
                "@value": "1"
            }, 
            "sh:minCount": {
                "@type": "xsd:integer", 
                "@value": "1"
            }, 
            "sh:name": {
                "@language": "en", 
                "@value": "mathemcatical dimension"
            }, 
            "sh:path": {
                "@id": "http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#dimension"
            }
        }, 
        {
            "@id": "_:n3-51", 
            "sh:class": {
                "@id": "xsd:anyType"
            }, 
            "sh:maxCount": {
                "@type": "xsd:integer", 
                "@value": "1"
            }, 
            "sh:minCount": {
                "@type": "xsd:integer", 
                "@value": "1"
            }, 
            "sh:name": {
                "@language": "en", 
                "@value": "datatype"
            }, 
            "sh:path": {
                "@id": "http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#datatype"
            }
        }, 
        {
            "@id": "_:n3-52", 
            "sh:datatype": {
                "@id": "xsd:anyType"
            }, 
            "sh:maxCount": {
                "@type": "xsd:integer", 
                "@value": "1"
            }, 
            "sh:minCount": {
                "@type": "xsd:integer", 
                "@value": "1"
            }, 
            "sh:name": {
                "@language": "en", 
                "@value": "value"
            }, 
            "sh:path": {
                "@id": "schema:value"
            }
        }, 
        {
            "@id": "_:n3-53", 
            "sh:datatype": {
                "@id": "qudt:Unit"
            }, 
            "sh:maxCount": {
                "@type": "xsd:integer", 
                "@value": "1"
            }, 
            "sh:minCount": {
                "@type": "xsd:integer", 
                "@value": "1"
            }, 
            "sh:name": {
                "@language": "en", 
                "@value": "unit"
            }, 
            "sh:path": {
                "@id": "http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#unit"
            }
        }, 
        {
            "@id": "http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#ParameterShape", 
            "@type": "sh:NodeShape", 
            "rdfs:label": "parameter", 
            "sh:property": [
                {
                    "@id": "_:n3-50"
                }, 
                {
                    "@id": "_:n3-51"
                }, 
                {
                    "@id": "_:n3-52"
                }, 
                {
                    "@id": "_:n3-53"
                }
            ], 
            "sh:targetClass": {
                "@id": "http://www.iot.wzl-mq.rwth-aachen.de/terms/soil#Parameter"
            }
        }
    ]
}

[MattGroenewald]

I do not get it...

qudt/qudt-public-repo#315

[NicolasCARPi]

Okay that's weird, the project is indeed active, but the website shows a standard tomcat page and all urls are 404 :/

[MattGroenewald]

I think there is an issue with SSL the unencrypted page is still live. But true not a good first impression.

[NicolasCARPi]

Yep, that's it, curling the http url works. My browser is set to "force https" so that's why. It's a bit weird to have a working TLS certificate but not use it.

[NicolasCARPi]

See: qudt/qudt-public-repo#424 (comment)

[MattGroenewald]

Try:

https://git.rwth-aachen.de/coscine/graphs/applicationprofiles/-/blob/master/profiles/radar/index.ttl

Shape URL: "https://purl.org/coscine/ap/radar/"

MimeType: "text/turtle"