RO-Crate
Use cases in biodiversity

Stian Soiland-Reyes

eScience lab, The University of Manchester

INDElab, University of Amsterdam

Aims of FAIR Research Objects

Describe and package data collections, datasets, software etc. with their metadata

Platform-independent object exchange between repositories and services

Support reproducibility and analysis: link data with codes and workflows

Transfer of sensitive/large distributed datasets with persistent identifiers

Aggregate citations and persistent identifiers

Propagate provenance and existing metadata

Publish and archive mixed objects and references

Reuse existing standards, but hide their complexity

{
  "@context": "https://w3id.org/ro/crate/1.1/context",
  "@graph": [
    {
      "@id": "ro-crate-metadata.json",
      "@type": "CreativeWork",
      "about": {
        "@id": "./"
      },
      "conformsTo": [
        {
          "@id": "https://w3id.org/ro/crate/1.1"
        },
        {
          "@id": "https://about.workflowhub.eu/Workflow-RO-Crate/"
        }
      ]
    },
    {
      "@id": "ro-crate-preview.html",
      "@type": "CreativeWork",
      "about": {
        "@id": "./"
      }
    },
    {
      "@id": "./",
      "@type": "Dataset",
      "mainEntity": {
        "@id": "Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga"
      },
      "hasPart": [
        {
          "@id": "Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga"
        },
        {
          "@id": "purge_image.png"
        }
      ],
      "identifier": "https://workflowhub.eu/workflows/237?version=1",
      "url": "https://workflowhub.eu/workflows/237/ro_crate?version=1",
      "name": "Research Object Crate for Purge duplicates from hifiasm assembly v1.0 (HiFi genome assembly stage 3)",
      "description": "Optional workflow to purge duplicates from the contig assembly.\r\n\r\nInfrastructure_deployment_metadata: Galaxy Australia (Galaxy)",
      "sdDatePublished": "2021-11-23 10:44:32 +0000",
      "creativeWorkStatus": "Stable"
    },
    {
      "@id": "Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga",
      "@type": [
        "File",
        "SoftwareSourceCode",
        "ComputationalWorkflow"
      ],
      "programmingLanguage": {
        "@id": "#galaxy"
      },
      "image": {
        "@id": "purge_image.png"
      },
      "contentSize": 115723,
      "dct:conformsTo": "https://bioschemas.org/profiles/ComputationalWorkflow/1.0-RELEASE/",
      "description": "Optional workflow to purge duplicates from the contig assembly.\r\n\r\nInfrastructure_deployment_metadata: Galaxy Australia (Galaxy)",
      "name": "Purge duplicates from hifiasm assembly v1.0 (HiFi genome assembly stage 3)",
      "url": "https://workflowhub.eu/workflows/237?version=1",
      "keywords": "Assembly, purge_dups, HiFi",
      "version": 1,
      "license": "https://opensource.org/licenses/GPL-3.0",
      "creator": {
        "@id": "https://workflowhub.eu/people/139"
      },
      "producer": [
        {
          "@id": "https://workflowhub.eu/projects/54"
        },
        {
          "@id": "https://workflowhub.eu/projects/30"
        }
      ],
      "dateCreated": "2021-11-15T01:39:22Z",
      "dateModified": "2021-11-15T01:40:24Z",
      "isPartOf": [

      ],
      "input": [
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-inputs-HiFiASM 1o assembly"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-inputs-HiFi reads as FASTQ"
        }
      ],
      "output": [
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-split_fasta"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-alignment_output"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-stat_file"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-pbcstat_cov"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-pbcstat_wig"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-hist"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-calcuts_log"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-calcuts_tab"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-purge_dups_log"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-purge_dups_bed"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-get_seqs_hap"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-get_seqs_purged"
        },
        {
          "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-stats"
        }
      ],
      "sdPublisher": {
        "@id": "http://about.workflowhub.eu"
      }
    },
    {
      "@id": "purge_image.png",
      "@type": [
        "File",
        "ImageObject",
        "WorkflowSketch"
      ],
      "contentSize": 118673
    },
    {
      "@id": "https://about.workflowhub.eu/Workflow-RO-Crate/",
      "@type": "CreativeWork",
      "name": "Workflow RO-Crate Profile",
      "version": "0.2.0"
    },
    {
      "@id": "https://workflowhub.eu/people/139",
      "@type": "Person",
      "name": "Gareth Price"
    },
    {
      "@id": "https://workflowhub.eu/projects/54",
      "@type": [
        "Project",
        "Organization"
      ],
      "name": "Galaxy Australia"
    },
    {
      "@id": "https://workflowhub.eu/projects/30",
      "@type": [
        "Project",
        "Organization"
      ],
      "name": "Australian BioCommons"
    },
    {
      "@id": "#galaxy",
      "@type": "ComputerLanguage",
      "name": "Galaxy",
      "identifier": {
        "@id": "https://galaxyproject.org/"
      },
      "url": {
        "@id": "https://galaxyproject.org/"
      }
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-inputs-HiFiASM%201o%20assembly",
      "@type": "FormalParameter",
      "name": "HiFiASM 1o assembly",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-inputs-HiFi%20reads%20as%20FASTQ",
      "@type": "FormalParameter",
      "name": "HiFi reads as FASTQ",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-split_fasta",
      "@type": "FormalParameter",
      "name": "split_fasta",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-alignment_output",
      "@type": "FormalParameter",
      "name": "alignment_output",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-stat_file",
      "@type": "FormalParameter",
      "name": "stat_file",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-pbcstat_cov",
      "@type": "FormalParameter",
      "name": "pbcstat_cov",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-pbcstat_wig",
      "@type": "FormalParameter",
      "name": "pbcstat_wig",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-hist",
      "@type": "FormalParameter",
      "name": "hist",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-calcuts_log",
      "@type": "FormalParameter",
      "name": "calcuts_log",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-calcuts_tab",
      "@type": "FormalParameter",
      "name": "calcuts_tab",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-purge_dups_log",
      "@type": "FormalParameter",
      "name": "purge_dups_log",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-purge_dups_bed",
      "@type": "FormalParameter",
      "name": "purge_dups_bed",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-get_seqs_hap",
      "@type": "FormalParameter",
      "name": "get_seqs_hap",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-get_seqs_purged",
      "@type": "FormalParameter",
      "name": "get_seqs_purged",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "#purge_duplicates_from_hifiasm_assembly_v1_0__hifi_genome_assembly_stage_3_-outputs-stats",
      "@type": "FormalParameter",
      "name": "stats",
      "dct:conformsTo": "https://bioschemas.org/profiles/FormalParameter/1.0-RELEASE/"
    },
    {
      "@id": "http://about.workflowhub.eu",
      "@type": "Organization",
      "name": "WorkflowHub",
      "url": "http://about.workflowhub.eu"
    }
  ]
}
ro-crate-metadata.json

Text

(ro-crate) stain@xena:~/Downloads$ ls workflow-237-1.crate.zip (ro-crate) stain@xena:~/Downloads$ mkdir workflow-237-1 ; cd workflow-237-1 (ro-crate) stain@xena:~/Downloads/workflow-237-1$ unzip ../workflow*zip Archive:  ../workflow-237-1.crate.zip   inflating: purge_image.png   inflating: ro-crate-metadata.json   inflating: Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga   inflating: ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$ rochtml ro-crate-metadata.json (ro-crate) stain@xena:~/Downloads/workflow-237-1$ ls Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga purge_image.png ro-crate-metadata.json ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$

Generate a HTML preview from JSON-LD

(ro-crate) stain@xena:~/Downloads$ ls workflow-237-1.crate.zip (ro-crate) stain@xena:~/Downloads$ mkdir workflow-237-1 ; cd workflow-237-1 (ro-crate) stain@xena:~/Downloads/workflow-237-1$ unzip ../workflow*zip Archive:  ../workflow-237-1.crate.zip   inflating: purge_image.png   inflating: ro-crate-metadata.json   inflating: Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga   inflating: ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$ rochtml ro-crate-metadata.json (ro-crate) stain@xena:~/Downloads/workflow-237-1$ ls Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga purge_image.png ro-crate-metadata.json ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$
(ro-crate) stain@xena:~/Downloads$ ls workflow-237-1.crate.zip (ro-crate) stain@xena:~/Downloads$ mkdir workflow-237-1 ; cd workflow-237-1 (ro-crate) stain@xena:~/Downloads/workflow-237-1$ unzip ../workflow*zip Archive:  ../workflow-237-1.crate.zip   inflating: purge_image.png   inflating: ro-crate-metadata.json   inflating: Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga   inflating: ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$ rochtml ro-crate-metadata.json (ro-crate) stain@xena:~/Downloads/workflow-237-1$ ls Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga purge_image.png ro-crate-metadata.json ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$
(ro-crate) stain@xena:~/Downloads$ ls workflow-237-1.crate.zip (ro-crate) stain@xena:~/Downloads$ mkdir workflow-237-1 ; cd workflow-237-1 (ro-crate) stain@xena:~/Downloads/workflow-237-1$ unzip ../workflow*zip Archive:  ../workflow-237-1.crate.zip   inflating: purge_image.png   inflating: ro-crate-metadata.json   inflating: Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga   inflating: ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$ rochtml ro-crate-metadata.json (ro-crate) stain@xena:~/Downloads/workflow-237-1$ ls Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga purge_image.png ro-crate-metadata.json ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$
(ro-crate) stain@xena:~/Downloads$ ls workflow-237-1.crate.zip (ro-crate) stain@xena:~/Downloads$ mkdir workflow-237-1 ; cd workflow-237-1 (ro-crate) stain@xena:~/Downloads/workflow-237-1$ unzip ../workflow*zip Archive:  ../workflow-237-1.crate.zip   inflating: purge_image.png   inflating: ro-crate-metadata.json   inflating: Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga   inflating: ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$ rochtml ro-crate-metadata.json (ro-crate) stain@xena:~/Downloads/workflow-237-1$ ls Galaxy-Workflow-Purge_duplicates_from_hifiasm_assembly_v1.0.ga purge_image.png ro-crate-metadata.json ro-crate-preview.html (ro-crate) stain@xena:~/Downloads/workflow-237-1$

Techie deep-dive!

Warning: JSON ahead

RO-Crate tutorials

Making your own RO-Crate with Crate-O

Provenance of computational processes

Workflow definition is optional,
but recommended

    {
        "@id": "#wfrun-5a5970ab-4375-444d-9a87-a764a66e3a47",
        "@type": "CreateAction",
        "name": "Galaxy workflow run 5a5970ab-4375-444d-9a87-a764a66e3a47",
        "endTime": "2018-09-19T17:01:07+10:00",
        "instrument": {"@id": "Galaxy-Workflow-Hello_World.ga"},
        "subjectOf": {"@id": "https://usegalaxy.eu/u/5dbf7f05329e49c98b31243b5f35045c/p/invocation-report-a3a1d27edb703e5c"},
        "object": [
            {"@id": "inputs/abcdef.txt"},
            {"@id": "#verbose-pv"}
        ],
        "result": [
            {"@id": "outputs/Select_first_on_data_1_2.txt"},
            {"@id": "outputs/tac_on_data_360_1.txt"}
        ]
    },
    {
        "@id": "Galaxy-Workflow-Hello_World.ga",
        "@type": ["File", "SoftwareSourceCode", "ComputationalWorkflow"],
        "name": "Hello World (Galaxy Workflow)",
        "author": {"@id": "https://orcid.org/0000-0001-9842-9718"},
        "creator": {"@id": "https://orcid.org/0000-0001-9842-9718"},
        "programmingLanguage": {"@id": "https://w3id.org/workflowhub/workflow-ro-crate#galaxy"},
        "input": [
            {"@id": "#simple_input"},
            {"@id": "#verbose-param"}
        ],
        "output": [
            {"@id": "#reversed"},
            {"@id": "#last_lines"}
        ]
    },

Choice of layered profiles:
Process Run Crate – some tool was executed
Workflow Run Crate – the tool was a workflow
Provenance Run Crate – we know which tools the workflow ran

RO-Crate in biodiversity

Jonas Grieb, Claus Weiland

Senckenberg – Leibniz Institution for Biodiversity and Earth System Research

(base) stain@xena:~$ signposting https://wildlive.senckenberg.de/captureevent/wildlive/7df91e6d148a386cc674
Signposting for https://wildlive.senckenberg.de/captureevent/wildlive/7df91e6d148a386cc674
CiteAs: <https://wildlive.senckenberg.de/api/objects/wildlive/7df91e6d148a386cc674>
License: <http://spdx.org/licenses/CC-BY-4.0>
Author: <https://orcid.org/0000-0002-2631-4601>
DescribedBy: <https://wildlive.senckenberg.de/api/call?objectId=wildlive/7df91e6d148a386cc674&method=getAsROCrate> application/ld+json
Item: <https://wildlive.senckenberg.de/api/objects/wildlive/6f6afb2850b946bb9394?payload=CamTrapImport_2019-11-29_AdditionalStations_LaCachuela_201_A_601.JPG> image/jpeg
      <https://wildlive.senckenberg.de/api/objects/wildlive/4e7d9c400a5fa9d2023c?payload=CamTrapImport_2019-11-29_AdditionalStations_LaCachuela_201_A_607.JPG> image/jpeg
      <https://wildlive.senckenberg.de/api/objects/wildlive/dbfaee3660bef31479a3?payload=CamTrapImport_2019-11-29_AdditionalStations_LaCachuela_201_A_605.JPG> image/jpeg
      <https://wildlive.senckenberg.de/api/objects/wildlive/f8289a026088c8cd1b02?payload=CamTrapImport_2019-11-29_AdditionalStations_LaCachuela_201_A_609.JPG> image/jpeg
      <https://wildlive.senckenberg.de/api/objects/wildlive/a98330d9df31a8d10847?payload=CamTrapImport_2019-11-29_AdditionalStations_LaCachuela_201_A_608.JPG> image/jpeg
      <https://wildlive.senckenberg.de/api/objects/wildlive/ffafa0893d4a2af6d0ba?payload=CamTrapImport_2019-11-29_AdditionalStations_LaCachuela_201_A_606.JPG> image/jpeg

Machine-actionable navigation to an RO-Crate using Signposting

https://signposting.org/

Building BioDT RO-Crate FDO profiles

Kernel Attributes Table

IndexPropertyDescriptionTypeCardinalityCommentsExample

1 profile The FDO profile that a certain metadata description follows. URL 1/1 For now, we can refer to this repo for the profiles.  
2 license License for the FDO the metadata description is about. URL 1/1 The FDO might have a certain license, however, the metadata file should have a CC0 license. "http://creativecommons.org/licenses/by/4.0/"
3 type The nature of the object the metadata describes. For now, this follows the RO-Crate conventions. Text or URL 1/many   "Dataset"
4 identifier An identifier for the FDO. Ideally, a globally unique, persistent and resolvable identifier. Text or URL 1/1   "https://doi.org/10.1111/1365-2664.12222"
5 name Name of the FDO. Text 1/many   "BEEHAVE model"
6 description Short description of what the FDO is. Text 1/many   "BEEHAVE is a computer model to simulate the development of a honeybee colony and its nectar and pollen foraging behavior in different..."
7 datePublished Date of publication of the FDO. Date 1/1   "2014-03-04"
8 dateModified Most recent date where the FDO was modified. Date 1/1   "2014-03-04"
9 author Author of the FDO. Person or Organization 1/many If possible, use an ORCiD, otherwise use full name in natural order. "https://orcid.org/0000-0003-0791-7164"

Model-specific Attributes Table

IndexPropertyDescriptionTypeCardinalityCommentsExample

201 codeRepository Link to the repository or repositories where the un-compiled, human-readable code is located. URL 1/many A link to GitHub, GitLab, or similar. Preferably, the code repository should be under the BioDT GitHub organisation so people in the project have access to it. "https://github.com/BioDT/biodt-fair"
202 contributor Additional people or organisations that contributed to developing the model, despite not having authorship. Person or Organization 0/many If possible, use an ORCiD (or ROR ID, for organizations), otherwise use full name in natural order. "https://orcid.org/0000-0003-0791-7164"
203 softwareVersion The version of the model instance. Text 1/1 It is advised to follow the semantic versioning guidelines. "2.0.13"
204 programmingLanguage The computer programming language the code is written in. Text or ComputerLanguage 1/many   "Python"
205 runtimePlatform Runtime platform or script interpreter dependencies. Text 1/many   "Python 3.11"
206 operatingSystem Operating systems supported. Text 1/many   "Ubuntu 22.04.3"
207 softwareRequirements Component dependency requirements for the model. Text or URL 0/many This includes runtime environments and shared libraries that are not included as part of the model but are required to run it. ".NET runtime"

Julian Lopez Gordillo, Naturalis

First prototype: Use the COPO data brokering platform to support the processing, validation, and ingestion of standardised sample, barcode and sequencing metadata into the biodiversity genomics data ecosystem

Next: Consuming as part of larger pipeline

  • Use cases welcome!

  • RO-Crate as submission format

Debby Ku, Aaliyah Providence, Seanna McTaggart, Felix Shaw (Earlham Institute), ++

Attached vs Detached RO-Crate

Attached RO-Crate are used when there is some kind of folder-structure, typically archived as a ZIP file,

or on a traditional website.

 

Absolute URLs may still be listed as parts, but typically the parts are "files" and "directories" using relative paths.

{ "@context": "https://w3id.org/ro/crate/1.2-DRAFT/context",
  "@graph": [
    {
      "@type": "CreativeWork",
      "@id": "ro-crate-metadata.json",
      "conformsTo": {"@id": "https://w3id.org/ro/crate/1.2-DRAFT"},
      "about": {"@id": "./"}
    },  
    {
      "@id": "./",
      "@type": [
        "Dataset"
      ],
      "hasPart": [
        {
          "@id": "cp7glop.ai"
        },
        {
          "@id": "lots_of_little_files/"
        }
      ]
    },
    {
      "@id": "cp7glop.ai",
      "@type": "File",
      "name": "Diagram showing trend to increase",
      "contentSize": "383766",
      "description": "Illustrator file for Glop Pot",
      "encodingFormat": "application/pdf"
    },
    {
      "@id": "lots_of_little_files/",
      "@type": "Dataset",
      "name": "Too many files",
      "description": "This directory contains many small files, that we're not going to describe in detail."
    }
  ]
}

Detached RO-Crate has a standalone JSON-LD metadata file, e.g. returned by an API.

All the resources have absolute URIs
 

This style may also be suitable for a repository exposing the metadata from an RO-Crate ZIP file without exposing its individual files.

{ "@context": "https://w3id.org/ro/crate/1.2-DRAFT/context",
  "@graph": [
    {
      "@type": "CreativeWork",
      "@id": "ro-crate-metadata.json",
      "conformsTo": {"@id": "https://w3id.org/ro/crate/1.2-DRAFT"},
      "about": {"@id": "https://example.com/item/15?crate"}
    },  
    {
      "@id": "https://example.com/item/15?crate",
      "@type": [
        "Dataset"
      ],
      "hasPart": [
        {
          "@id": "https://example.com/data/12312/cp7glop.ai"
        }
      ]
    },
    {
      "@id": "http://example.com/data/12312/cp7glop.ai",
      "@type": "File",
      "name": "Diagram showing trend to increase",
      "contentSize": "383766",
      "description": "Illustrator file for Glop Pot",
      "encodingFormat": "application/pdf"
    }
  ]
}

Thank you!

2023-11-23 RO-Crate intro ERGA

By Stian Soiland-Reyes

2023-11-23 RO-Crate intro ERGA

Presented at ERGA call 2023-11-23

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