Dataset

Materials Data Facility portal

Materials Data Facility public portal/index for materials science datasets, including alloy, microscopy, and mechanical-property metadata. Imported metadata-only pending MDF API harvesting and dataset-level license review.

Materials Data Facility

Materials informatics

Metadata-only record

This entry is a public catalogue pointer: it links to an external website or repository, but no RDF graph/entities have been published in MatPortal yet. Browse graph-rich public records to explore RDF resources, SPARQL, and GraphRAG features.

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Summary

SPARQL

Quality

Passport

Metadata

Files & access

68%

Quality

Dataset identity

Stable URI: https://datagraph.dev.matportal.org/id/dataset/materials-data-facility-portal Open
Portal page: /datasets/materials-data-facility-portal Open
RDF Turtle: https://datagraph.dev.matportal.org/data/dataset/materials-data-facility-portal.ttl Open
License: Dataset-specific CC-BY-4.0/CC0 signals
Publisher: Materials Data Facility
Published by: admin
Project: MDF
Version: Not specified
Identifier: materials-data-facility-portal

What is available here?

A stable MatPortal dataset identifier and machine-readable metadata.
Public source/documentation links for the external portal or repository.
No MatPortal-hosted RDF graph, RDF resources, GraphRAG evidence, or SPARQL graph query yet.

Use the browse page sorted by RDF resources to find public datasets with named graphs, entity pages, SPARQL starters, and GraphRAG evidence.

Related ontologies and catalogue context

Materials informatics

PMDCO

MDF

mechanical properties

Files & access

1 file/access item

MDF portal

HTML

text/html

Open file/access URL

File preview

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

Named graphs

Query this data

No public graph releases are available for this dataset yet.

RDF resources

Entity previews will appear after public graph indexing.

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

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 { ?s ?p ?o } LIMIT 100

Open in SPARQL workbench

Graph-aware Q&A readiness

Dataset Metadata
Distribution

Dataset quality and readiness

Score: 68%
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: materials-data-facility-portal
DCAT: https://datagraph.dev.matportal.org/id/dataset/materials-data-facility-portal
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/materials-data-facility-portal/mirror-package",
  "type": "matportal:SemanticMirrorPackage",
  "dataset": "https://datagraph.dev.matportal.org/datasets/materials-data-facility-portal",
  "dataset_slug": "materials-data-facility-portal",
  "generated_at": "2026-07-16T20:52:17.832390+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": 1,
    "graphs": 0,
    "indexed_entities": 0,
    "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

Raw public metadata

{
  "id": "dataset_461b3f8467cede61",
  "slug": "materials-data-facility-portal",
  "title": "Materials Data Facility portal",
  "description": "Materials Data Facility public portal/index for materials science datasets, including alloy, microscopy, and mechanical-property metadata. Imported metadata-only pending MDF API harvesting and dataset-level license review.",
  "license": "Dataset-specific CC-BY-4.0/CC0 signals",
  "creators": [
    "Materials Data Facility"
  ],
  "organization": "Materials Data Facility",
  "project": "MDF",
  "published_by": "admin",
  "groups": [
    "Materials datasets",
    "Registry"
  ],
  "keywords": [
    "materials",
    "MDF",
    "registry",
    "alloys",
    "microscopy",
    "mechanical properties"
  ],
  "tags": [
    "materials",
    "MDF",
    "registry",
    "alloys",
    "microscopy",
    "mechanical properties"
  ],
  "visibility": "public",
  "status": "published",
  "ontology_annotations": [
    "PMDCO"
  ],
  "distributions": [
    {
      "title": "MDF portal",
      "filename": "materialsdatafacility.org",
      "description": "Materials Data Facility public portal/index for materials science datasets, including alloy, microscopy, and mechanical-property metadata. Imported metadata-only pending MDF API harvesting and dataset-level license review.",
      "visibility": "public",
      "status": "published",
      "media_type": "text/html",
      "format": "HTML",
      "checksum_sha256": "",
      "size_bytes": 0,
      "source_uri": "https://materialsdatafacility.org/",
      "download_url": "https://materialsdatafacility.org/",
      "access_url": "https://materialsdatafacility.org/",
      "uri": "https://datagraph.dev.matportal.org/id/distribution/materials-data-facility-portal/resource_d26d69ba001b5dd0",
      "url_type": "external",
      "rdf_format": null,
      "ontology_annotations": [],
      "data_dictionary": [],
      "views": [
        {
          "id": "",
          "title": "Download",
          "view_type": "download",
          "url": "",
          "embed_url": "",
          "embeddable": false,
          "description": "",
          "default": true,
          "config": {}
        }
      ],
      "datastore_active": false,
      "datastore_enabled": false,
      "has_views": true,
      "mapping_supported": false,
      "query_supported": false,
      "transform_provenance": {
        "was_derived_from": "https://materialsdatafacility.org/",
        "harvested_from": "GitHub public repository metadata",
        "metadata_only": true
      },
      "id": "resource_d26d69ba001b5dd0",
      "dataset_slug": "materials-data-facility-portal",
      "created_at": "2026-06-14T01:46:17.230761Z",
      "updated_at": "2026-06-14T01:46:17.230761Z"
    }
  ],
  "graph_ids": [],
  "entity_count": 0,
  "follower_count": 0,
  "contact_points": [],
  "publisher": "Materials Data Facility",
  "homepage": "https://materialsdatafacility.org/",
  "landing_page": "https://materialsdatafacility.org/",
  "release_date": "",
  "modification_date": "",
  "version": "",
  "version_notes": "",
  "identifier": "",
  "frequency": "",
  "provenance": "Curated public GitHub dataset/repository candidate discovered for MatPortal Data browse. Metadata-only import; no repository contents downloaded.",
  "dataset_type": "repository",
  "temporal_coverage": [],
  "temporal_resolution": "",
  "spatial_coverage": [],
  "spatial_resolution_meters": null,
  "access_rights": "",
  "other_identifiers": [],
  "theme": [
    "Materials informatics",
    "Data registry"
  ],
  "language": [
    "en"
  ],
  "documentation": [
    "https://materialsdatafacility.org/"
  ],
  "conforms_to": [],
  "is_referenced_by": [],
  "applicable_legislation": [],
  "has_version": [],
  "qualified_relations": [],
  "citation": "",
  "activity": [
    {
      "at": "2026-06-14T01:46:10.559180+00:00",
      "event": "dataset_created",
      "actor": "admin",
      "note": "Dataset registered in native DataGraph"
    },
    {
      "at": "2026-06-14T01:46:13.333217+00:00",
      "event": "dataset_imported",
      "actor": "admin",
      "note": "Imported/updated from curated public GitHub discovery."
    },
    {
      "at": "2026-06-14T01:46:17.230761+00:00",
      "event": "resource_added",
      "actor": "admin",
      "resource_id": "resource_d26d69ba001b5dd0",
      "note": "MDF portal"
    }
  ],
  "metadata": {
    "publisher": "",
    "published_by": "admin",
    "contact_points": [],
    "homepage": "",
    "landing_page": "",
    "release_date": "",
    "modification_date": "",
    "version": "",
    "version_notes": "",
    "identifier": "",
    "frequency": "",
    "provenance": "",
    "type": "",
    "temporal_coverage": "",
    "temporal_resolution": "",
    "spatial_coverage": "",
    "spatial_resolution_meters": "",
    "access_rights": "",
    "language": [],
    "documentation": [],
    "conforms_to": [],
    "is_referenced_by": [],
    "applicable_legislation": [],
    "has_version": [],
    "qualified_relation": [],
    "qualified_attribution": [],
    "extras": {}
  },
  "created_at": "2026-06-14T01:46:10.559180Z",
  "updated_at": "2026-06-14T01:46:17.230761Z"
}