> ## Documentation Index > Fetch the complete documentation index at: https://docs.catalog.igvf.org/llms.txt > Use this file to discover all available pages before exploring further. # Files Filesets > Retrieve data about a specific dataset. Example: file_fileset_id = ENCFF004PFU, fileset_id = ENCSR359DFW, lab = jesse-engreitz, preferred_assay_title = DNase-seq, method = MPRA, donor_id = ENCDO000AAK, sample_term = EFO_0002784, sample_summary = GM12878, software = Distal regulation ENCODE-rE2G, cell_annotation = mesodermal cell, class = prediction, source = ENCODE. The limit parameter controls the page size and can not exceed 500. Pagination is 0-based. ## OpenAPI ````yaml /openapi/catalog-dev.openapi.json get /files-filesets openapi: 3.0.3 info: title: IGVF Catalog - Development description: >- Development IGVF Catalog OpenAPI compliant REST API built using tRPC with Express. Our database uses 0-based, half-open coordinates for genomic coordinates in the GRCh38 (human) and GRCm39 (mouse) reference genomes. Data is licensed under the Creative Commons license and the software is licensed under the MIT license. version: 1.2.0 - DEV servers: - url: https://catalog-api-dev.demo.igvf.org/api security: [] externalDocs: url: https://api-dev.catalog.igvf.org/openapi paths: /files-filesets: get: summary: Files Filesets description: |- Retrieve data about a specific dataset. Example: file_fileset_id = ENCFF004PFU, fileset_id = ENCSR359DFW, lab = jesse-engreitz, preferred_assay_title = DNase-seq, method = MPRA, donor_id = ENCDO000AAK, sample_term = EFO_0002784, sample_summary = GM12878, software = Distal regulation ENCODE-rE2G, cell_annotation = mesodermal cell, class = prediction, source = ENCODE. The limit parameter controls the page size and can not exceed 500. Pagination is 0-based. operationId: filesFilesets parameters: - name: file_fileset_id in: query required: false schema: type: string - name: fileset_id in: query required: false schema: type: string - name: lab in: query required: false schema: type: string enum: - alan-boyle - bill-majoros - charles-gersbach - doug-fowler - gary-hon - j-michael-cherry - jay-shendure - jesse-engreitz - karen-mohlke - kushal-dey - lea-starita - luca-pinello - marc-vidal - mark-craven - nadav-ahituv - predrag-radivojac - thomas-quertermous - tim-reddy - zhiping-weng - name: preferred_assay_title in: query required: false schema: type: string enum: - CRISPR FACS screen - CRISPR FlowFISH screen - DNase-seq - DUAL-IPA - MPRA - Parse Perturb-seq - Perturb-seq - SGE - STARR-seq - TAP-seq - VAMP-seq - VAMP-seq (MultiSTEP) - Variant-EFFECTS - electroporated MPRA - lentiMPRA - scATAC-seq - scCRISPR screen - snATAC-seq - name: method in: query required: false schema: type: string enum: - BlueSTARR - CRISPR screen - DUAL-IPA - ENCODE-rE2G - ESM-1v - MPRA - MutPred2 - Perturb-seq - SEMVAR - SGE - STARR-seq - VAMP-seq - VAMP-seq (MultiSTEP) - Variant-EFFECTS - cV2F - caQTL - candidate Cis-Regulatory Elements - elements - scATAC-seq - scE2G - snATAC-seq - name: crispr_modality in: query required: false schema: type: string enum: - activation - base editing - interference - knockout - prime editing - name: donor_id in: query required: false schema: type: string - name: sample_term in: query required: false schema: type: string - name: sample_summary in: query required: false schema: type: string - name: software in: query required: false schema: type: string enum: - 2024_multistep - BCalm - BEDTools - BIRD - BlueSTARR - CRISPR-Millipede - CRISPResso2 - Cooler - CountESS - DESeq2 - DUAL-IPA analysis scripts - Distal regulation ENCODE-rE2G - DistalRegulationCRISPRdata - ESM-1v - FRACTEL - MPRAflow tsv-to-bed - MutPred2 - NumPy - Pysam - SEMVAR - SGE Pipeline - Samtools - Sceptre - SciPy - Seaborn - Seurat - Snakemake - Straw - Variant-EFFECTS - bigWigAverageOverBed - cV2F - cyp2c19_2c9 - matplotlib - mpralm - pandas - pySpade - pybedtools - scATAC-seq processing scripts - scE2G - statsmodels - name: cell_annotation in: query required: false schema: type: string enum: - extraembryonic parietal endodermal cell - extraembryonic visceral endodermal cell - intermediate extraembryonic parietal endodermal cell - mesodermal cell - neurectodermal cell - pluripotent epiblast cell - surface ectodermal cell - name: has_genome_browser_link in: query required: false schema: type: string enum: - 'true' - 'false' - name: source in: query required: false schema: type: string enum: - ENCODE - IGVF - name: class in: query required: false schema: type: string enum: - biological relationship - observed data - prediction - name: page in: query required: false schema: type: number default: 0 - name: limit in: query required: false schema: type: number responses: '200': description: Successful response content: application/json: schema: type: array items: type: object properties: _id: type: string file_set_id: type: string lab: type: string preferred_assay_titles: type: array items: type: string nullable: true assay_term_ids: type: array items: type: string nullable: true method: type: string class: type: string software: type: array items: type: string nullable: true collections: type: array items: type: string nullable: true samples: type: array items: type: string nullable: true sample_ids: type: array items: type: string nullable: true simple_sample_summaries: type: array items: type: string nullable: true donors: type: array items: type: string nullable: true source: type: string source_url: type: string download_link: type: string cell_annotation: type: string nullable: true genome_browser_link: type: string nullable: true crispr_modality: type: string nullable: true required: - _id - file_set_id - lab - method - class - source - source_url - download_link additionalProperties: false default: $ref: '#/components/responses/error' components: responses: error: description: Error response content: application/json: schema: type: object properties: message: type: string code: type: string issues: type: array items: type: object properties: message: type: string required: - message additionalProperties: false required: - message - code additionalProperties: false ````