HTO Demo

File preview

Preview metadata is available, but no preview rows were returned.

RDF resources

Ask this dataset with GraphRAG

GraphRAG searches MatPortal's public dataset metadata, named graph metadata, indexed RDF resources, and facts. It does not copy or vectorize every external file or raw distribution.

Ask a question above to get a graph-aware answer and a safe SPARQL starting point.

Indexed sources

• Dataset Metadata
• Distribution
• Distribution
• Distribution
• Distribution
• Distribution
• Named Graph

Query this dataset

Use the guarded public SPARQL workbench with a dataset graph template. Only read-only SELECT queries with limits are accepted.

SELECT ?s ?p ?o WHERE {
  VALUES ?g { <https://datagraph.dev.matportal.org/id/graph/hto-demo/2022-06-10-12-03-55-charge-3471-joined-88330f7c> }
  GRAPH ?g { ?s ?p ?o }
}
LIMIT 100

Graph-aware Q&A readiness

• Dataset Metadata
• Distribution
• Distribution
• Distribution
• Distribution
• Distribution
• Named Graph

Dataset quality and readiness

Score

73%

Maturity

review_ready

Publication boundary

Public output is derived from reviewed public dataset/resource/graph metadata only.

Checks and recommendations

• Core metadata completeness
• Persistent identifier and citation readiness
• License availability
• File, service, or access-resource links
• Ontology and linked-data context
• Unit and quantity-kind validation
• Governance and review state

Dataset FAIR assessment

FAIR assessment is not available yet.

Unit profile

{
  "valid": true,
  "score": 1.0,
  "checked_fields": [],
  "issues": [],
  "profile": "matportal-materials-qudt-lite-v1"
}

Semantic dataset passport

Passport ID

hto-demo

DCAT

https://datagraph.dev.matportal.org/id/dataset/hto-demo

Review status

published

Semantic mirror manifest

{
  "@context": {
    "dcterms": "http://purl.org/dc/terms/",
    "dcat": "http://www.w3.org/ns/dcat#",
    "prov": "http://www.w3.org/ns/prov#",
    "matportal": "https://w3id.org/matportal/schema#"
  },
  "id": "https://datagraph.dev.matportal.org/api/v1/datasets/hto-demo/mirror-package",
  "type": "matportal:SemanticMirrorPackage",
  "dataset": "https://datagraph.dev.matportal.org/datasets/hto-demo",
  "dataset_slug": "hto-demo",
  "generated_at": "2026-07-16T22:56:30.387871+00:00",
  "raw_data_policy": "linked-only; no raw data copied by this package",
  "publication_boundary": "review artefact; downstream data-space publication remains governed",
  "contains": [
    "dcat-jsonld",
    "datacite-style-metadata",
    "ro-crate-metadata",
    "ckan-package-json",
    "edc-asset-json",
    "aas-submodel-semantic-ids",
    "sssom-mapping-snapshot",
    "shacl-shape-scaffold",
    "review-record"
  ],
  "counts": {
    "resources": 5,
    "graphs": 1,
    "indexed_entities": 258,
    "mappings": 0,
    "unit_fields_checked": 0
  },
  "source_authority": "MatPortal dataset metadata and linked external providers remain authoritative; connector cards preserve source links."
}

Material identity crosswalk

No public material identity crosswalk entries are linked to this dataset yet.

Machine access

• Dataset Turtle
• Dataset identifier
• Schema.org JSON-LD
• Catalogue JSON-LD
• Source / documentation

Raw public metadata

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  "slug": "hto-demo",
  "title": "HTO Demo",
  "description": "demo data set von PT500 für HTO applications Ontologien. This MatPortal catalogue entry is listed under PMD, catalogued under the PMD project. It includes 5 linked resources with formats such as CSV, JSON, text/turtle; charset=utf-8, yaml, turtle, including 2022.06.10_12.03.55_Charge_3471.csv, 2022.06.10_12.03.55_charge_3471-metadata.json, 2022.06.10_12.03.55_charge_3471-joined.ttl.",
  "license": "License not specified",
  "creators": [],
  "organization": "PMD",
  "project": "PMD",
  "published_by": "admin",
  "groups": [],
  "keywords": [],
  "tags": [],
  "visibility": "public",
  "status": "published",
  "ontology_annotations": [],
  "distributions": [
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      "format": "CSV",
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          "description": "",
          "default": true,
          "config": {}
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      ],
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        {
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          "embed_url": "",
          "embeddable": false,
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          "default": true,
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        {
          "id": "",
          "title": "Create Mapping",
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          "url": "",
          "embed_url": "",
          "embeddable": false,
          "description": "",
          "default": false,
          "config": {
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        },
        {
          "id": "",
          "title": "Query",
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  "follower_count": 0,
  "contact_points": [
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      "email": "",
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  "landing_page": "https://dataportal.material-digital.de/dataset/hto-demo",
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  "dataset_type": "dataset",
  "temporal_coverage": [],
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    "extras": {}
  },
  "created_at": "2026-06-14T01:24:51.628958Z",
  "updated_at": "2026-06-14T01:31:37.685203Z"
}