rdflint

rdflint Users Guide
Note. Currencty translate to English from Japanese. Some part is still in Japanese.

What's rdflint

rdflint is a linter for RDF files. Easy to check syntax and other things. rdflint is powered by Apache Jena.

rdflint has following functions.

• Syntax check of rdf and Turtle(ttl).
• Undefined subject check when use as predicate or object.
• Custom check by SPARQL query.
• Degrade validation.
• Datatype & outlier validation.
• SHACL constraint validation.
• Literal trim validation.
• File encoding validation.
• RDF generation by SPARQL query results.
• SPARQL playground on your PC. (Interactive Mode)

Getting Started

Work on Visual Studio Code

Use vscode-rdflint

Work on your PC

Download from jitpack.

$ wget https://jitpack.io/com/github/imas/rdflint/0.2.1/rdflint-0.2.1.jar

Run for apply to your RDF files.

$ java -jar rdflint-0.2.1.jar -targetdir example/dataset

-targetdir parameter is location of target RDF files.

Work on GitHub Actions

Make .github/workflows/ci.yml to your repository. Its contents is following.

name: CI
on: pull_request
jobs:
  rdflint:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - uses: actions/setup-java@v2
      with:
        distribution: adopt
        java-version: 11
    - uses: imas/setup-rdflint@v1
    - name: Run rdflint
      run: rdflint

See imas/setup-rdflint for more information.

Configurations

When create a configuration file of rdflint, rdflint provide additional checks. Run with -config parameter like following.

$ java -jar rdflint-0.2.1.jar -targetdir example/dataset -config example/dataset/rdflint-config.yml

-config parameter is location of rdflint configuration file.

Undefined subject checks

Write configuration file like a following.

baseUri: https://sparql.crssnky.xyz/imasrdf/

And check undefined subject under baseUri, when use as predicate or object.

SPARQL based custom checks

Write configuration file like a following.

rules:
- name: file class
  target: "RDFs/765AS.rdf"
  query: |
    PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
    SELECT ?s ?o
    WHERE {
      ?s rdf:type ?o .
      FILTER NOT EXISTS {
        ?s rdf:type <https://sparql.crssnky.xyz/imasrdf/URIs/imas-schema.ttl#Idol>
      }
    }
  valid: |
    while(rs.hasNext()) {
      log.warn("Idol definition file " + rs.next())
    }

And run SPARQL query of rules-query to target file of rules-target. Groovy script of rules-valid apply to result set of query.

Degrade validation

Run with -origindir parameter like following.

$ java -jar rdflint-0.2.1.jar -targetdir example/dataset -origindir example/dataset_origin -config example/dataset/rdflint-config.yml

And check subject and triple, removed from origindir. Its problem report as INFO level.

SHACL constraint validation

write your SHACL constraint in .ttl or .rdf file. and put this file in directory which specified by -targetdir.

RDF generation

Write configuration file like a following.

baseUri: https://sparql.crssnky.xyz/imasrdf/
generation:
  - query: |
      PREFIX schema: <http://schema.org/>
      PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
      PREFIX imas: <https://sparql.crssnky.xyz/imasrdf/URIs/imas-schema.ttl#>
      SELECT  ?m (group_concat(?s;separator=",,,,,")as ?u)
      WHERE {
        ?s rdf:type imas:Unit;
           schema:member ?m.
      }group by (?m) order by (?m)
    template: .circleci/Unit_memberOf.rdf.template
    output: RDFs/Unit_memberOf.rdf

Write template file like a following.

<rdf:RDF
xmlns:schema="http://schema.org/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
xmlns:imas="https://sparql.crssnky.xyz/imasrdf/URIs/imas-schema.ttl#"
>[# th:each="idol : ${rs}"]
  <rdf:Description rdf:about="[(${idol.m.substring(params.baseUri.length()+5)})]">[# th:each="item : ${idol.u.split(',,,,,')}"]
    <schema:memberOf rdf:resource="[(${item})]"/>
[/]  </rdf:Description>
[/]</rdf:RDF>

And generate rdf file like a following.

<rdf:RDF
xmlns:schema="http://schema.org/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
xmlns:imas="https://sparql.crssnky.xyz/imasrdf/URIs/imas-schema.ttl#"
>
  <rdf:Description rdf:about="detail/Abe_Nana">
    <schema:memberOf rdf:resource="https://sparql.crssnky.xyz/imasrdf/RDFs/detail/%E8%99%B9%E8%89%B2%E3%83%89%E3%83%AA%E3%83%BC%E3%83%9E%E3%83%BC"/>
    <schema:memberOf rdf:resource="https://sparql.crssnky.xyz/imasrdf/RDFs/detail/%E3%82%AF%E3%83%AC%E3%82%A4%E3%83%B3%EF%BC%86%E3%83%90%E3%83%8B%E3%83%BC"/>
....

Interactive Mode

Run interactive mode with -i parameter.

$ java -jar rdflint-0.2.1.jar -i -targetdir example/dataset -config example/dataset/rdflint-config.yml

And try to query. Double return to perform query, type :exit to exit interactive mode.

sparql > PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> SELECT ?s
> WHERE {
>   ?s rdf:type <https://sparql.crssnky.xyz/imasrdf/URIs/imas-schema.ttl#Idol> .
> }
>
---------------------------------------------------------------------
| s                                                                 |
=====================================================================
| <https://sparql.crssnky.xyz/imasrdf/RDFs/detail/Hagiwara_Yukiho>  |
| <https://sparql.crssnky.xyz/imasrdf/RDFs/detail/Miura_Azusa>      |
| <https://sparql.crssnky.xyz/imasrdf/RDFs/detail/Takatsuki_Yayoi>  |
........

Contributing

Please fork this repository, and create pull request for contributing.

Build and execute

Build rdflint with gradle.

$ gradle shadowJar

Run rdflint.

$ java -jar build/libs/rdflint.jar -targetdir example/dataset

IDE Settings

Use dotidea - Project Settings for IntelliJ IDEA.

License

rdflint is released under the MIT License.