> ## 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. # Variants Variant Linkage Disequilibrium > Retrieve genetic variants in linkage disequilibrium (LD). The following parameters can be used to set thresholds on r2 and d_prime: gt (>), gte (>=), lt (\<), lte (\<=). Set verbose = true to retrieve full info on the variants. At least one of these fields is required: variant_id, spdi, hgvs, rsid, ca_id, or region. Example: variant_id = NC_000011.10:9083634:A:T, spdi = NC_000011.10:9083634:A:T, hgvs = NC_000011.10:g.9083635A>T, rsid = rs60960132, ca_id = CA217534780, region = chr17:7166090-7166095 (maximum length: 10kb), r2 = gte:0.8, d_prime = gt:0.9, ancestry = EUR. The limit parameter controls the page size and can not exceed 500. Pagination is 0-based. ## OpenAPI ````yaml /openapi/catalog-dev.openapi.json get /variants/variant-ld 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: /variants/variant-ld: get: summary: Variants Variant Linkage Disequilibrium description: >- Retrieve genetic variants in linkage disequilibrium (LD). The following parameters can be used to set thresholds on r2 and d_prime: gt (>), gte (>=), lt (\<), lte (\<=). Set verbose = true to retrieve full info on the variants. At least one of these fields is required: variant_id, spdi, hgvs, rsid, ca_id, or region. Example: variant_id = NC_000011.10:9083634:A:T, spdi = NC_000011.10:9083634:A:T, hgvs = NC_000011.10:g.9083635A>T, rsid = rs60960132, ca_id = CA217534780, region = chr17:7166090-7166095 (maximum length: 10kb), r2 = gte:0.8, d_prime = gt:0.9, ancestry = EUR. The limit parameter controls the page size and can not exceed 500. Pagination is 0-based. operationId: variantsFromVariantID parameters: - name: spdi in: query required: false schema: type: string - name: hgvs in: query required: false schema: type: string - name: rsid in: query required: false schema: type: string - name: ca_id in: query required: false schema: type: string - name: variant_id in: query required: false schema: type: string - name: region in: query required: false schema: type: string - name: r2 in: query required: false schema: type: string - name: d_prime in: query required: false schema: type: string - name: ancestry in: query required: false schema: type: string enum: - AFR - EAS - EUR - SAS - name: organism in: query required: false schema: type: string enum: - Homo sapiens default: Homo sapiens - name: verbose in: query required: false schema: type: string enum: - 'true' - 'false' default: 'false' - 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: chr: type: string nullable: true ancestry: type: string nullable: true d_prime: type: number nullable: true r2: type: number nullable: true label: type: string variant_1_base_pair: type: string variant_1_rsid: type: string variant_2_base_pair: type: string variant_2_rsid: type: string variant_1_pos: type: number nullable: true variant_1_spdi: type: string nullable: true variant_1_hgvs: type: string nullable: true variant_2_pos: type: number nullable: true variant_2_spdi: type: string nullable: true variant_2_hgvs: type: string nullable: true source: type: string source_url: type: string sequence_variant: anyOf: - type: string - type: array items: type: object properties: _id: type: string chr: type: string pos: type: number rsid: type: array items: type: string nullable: true ref: type: string alt: type: string spdi: type: string hgvs: type: string ca_id: type: string nullable: true strain: type: array items: type: string nullable: true qual: type: string nullable: true files_filesets: type: string nullable: true annotations: type: object properties: bravo_af: type: number nullable: true gnomad_af_total: type: number nullable: true gnomad_af_afr: type: number nullable: true gnomad_af_afr_female: type: number nullable: true gnomad_af_afr_male: type: number nullable: true gnomad_af_ami: type: number nullable: true gnomad_af_ami_female: type: number nullable: true gnomad_af_ami_male: type: number nullable: true gnomad_af_amr: type: number nullable: true gnomad_af_amr_female: type: number nullable: true gnomad_af_amr_male: type: number nullable: true gnomad_af_asj: type: number nullable: true gnomad_af_asj_female: type: number nullable: true gnomad_af_asj_male: type: number nullable: true gnomad_af_eas: type: number nullable: true gnomad_af_eas_female: type: number nullable: true gnomad_af_eas_male: type: number nullable: true gnomad_af_female: type: number nullable: true gnomad_af_fin: type: number nullable: true gnomad_af_fin_female: type: number nullable: true gnomad_af_fin_male: type: number nullable: true gnomad_af_male: type: number nullable: true gnomad_af_nfe: type: number nullable: true gnomad_af_nfe_female: type: number nullable: true gnomad_af_nfe_male: type: number nullable: true gnomad_af_oth: type: number nullable: true gnomad_af_oth_female: type: number nullable: true gnomad_af_oth_male: type: number nullable: true gnomad_af_sas: type: number nullable: true gnomad_af_sas_male: type: number nullable: true gnomad_af_sas_female: type: number nullable: true gnomad_af_raw: type: number nullable: true GENCODE_category: type: string nullable: true funseq_description: type: string nullable: true additionalProperties: false nullable: true source: type: string source_url: type: string organism: type: string nullable: true required: - _id - chr - pos - ref - alt - annotations - source - source_url - organism additionalProperties: false name: type: string required: - chr - ancestry - d_prime - r2 - label - variant_1_base_pair - variant_1_rsid - variant_2_base_pair - variant_2_rsid - name 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 ````