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NCBI uses the Genome Reference Consortium (GRC) data model, reflecting the complexity of the modern genome assembly (see Figure 1 below)."><meta property="og:type" content="article"><meta property="og:url" content="/datasets/docs/v2/policies-annotation/data-model/"><meta property="article:section" content="policies-annotation"><meta itemprop=name content="The NCBI Genome Assembly Data Model"><meta itemprop=description content="NCBI provides stable accessions and data tracking for genome assemblies. It stores the names and identifiers for the sequences in each genome assembly as well as the associated metadata (such as assembly name, date of submission, name of submitter, details of sequenced organism), assembly statistics, and the organization of its component sequences into scaffolds and chromosomes. NCBI uses the Genome Reference Consortium (GRC) data model, reflecting the complexity of the modern genome assembly (see Figure 1 below)."><meta itemprop=wordCount content="440"><meta itemprop=keywords content><meta name=twitter:card content="summary"><meta name=twitter:title content="The NCBI Genome Assembly Data Model"><meta name=twitter:description content="NCBI provides stable accessions and data tracking for genome assemblies. It stores the names and identifiers for the sequences in each genome assembly as well as the associated metadata (such as assembly name, date of submission, name of submitter, details of sequenced organism), assembly statistics, and the organization of its component sequences into scaffolds and chromosomes. 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td-sidebar-link__page" id=m-datasetsdocsv2how-tosgenesget-gene-metadata><span>Get gene metadata</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosgenesdownload-gene-data-package-li><a href=/datasets/docs/v2/how-tos/genes/download-gene-data-package/ title="Download a gene data package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosgenesdownload-gene-data-package><span>Download genes</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosgenesdownload-ortholog-data-package-li><a href=/datasets/docs/v2/how-tos/genes/download-ortholog-data-package/ title="Download an ortholog data package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosgenesdownload-ortholog-data-package><span>Download orthologs</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2how-tosgenomes-li><a href=/datasets/docs/v2/how-tos/genomes/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2how-tosgenomes><span>Genomes</span></a><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosgenomesget-genome-metadata-li><a href=/datasets/docs/v2/how-tos/genomes/get-genome-metadata/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosgenomesget-genome-metadata><span>Get genome metadata</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosgenomesdownload-genome-li><a href=/datasets/docs/v2/how-tos/genomes/download-genome/ title="Download a genome data package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosgenomesdownload-genome><span>Download genome data</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosgenomeslarge-download-li><a href=/datasets/docs/v2/how-tos/genomes/large-download/ title="Download large genome data packages" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosgenomeslarge-download><span>Large genome downloads</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2how-tostaxonomy-li><a href=/datasets/docs/v2/how-tos/taxonomy/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2how-tostaxonomy><span>Taxonomy</span></a><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tostaxonomytaxonomy-li><a href=/datasets/docs/v2/how-tos/taxonomy/taxonomy/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tostaxonomytaxonomy><span>Get taxonomy metadata</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2how-tosvirus-li><a href=/datasets/docs/v2/how-tos/virus/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2how-tosvirus><span>Virus</span></a><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosvirusinfluenza-metadata-li><a href=/datasets/docs/v2/how-tos/virus/influenza-metadata/ title="Get Alphainfluenza virus genome metadata" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosvirusinfluenza-metadata><span>Get Alphainfluenza virus metadata</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosvirusvirus-metadata-li><a href=/datasets/docs/v2/how-tos/virus/virus-metadata/ title="Get virus genome metadata" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosvirusvirus-metadata><span>Get virus metadata</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosvirusvirus-download-li><a href=/datasets/docs/v2/how-tos/virus/virus-download/ title="Download a virus genome data package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosvirusvirus-download><span>Download virus genomes</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosvirusget-influenza-genomes-li><a href=/datasets/docs/v2/how-tos/virus/get-influenza-genomes/ title="Download an Alphainfluenza genome data package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosvirusget-influenza-genomes><span>Download Alphainfluenza genomes</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosvirusget-sars2-genomes-li><a href=/datasets/docs/v2/how-tos/virus/get-sars2-genomes/ title="Download a SARS-CoV-2 genome data package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosvirusget-sars2-genomes><span>Download SARS-CoV-2 genomes</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosvirusget-sars2-proteins-li><a href=/datasets/docs/v2/how-tos/virus/get-sars2-proteins/ title="Download a SARS-CoV-2 protein data package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosvirusget-sars2-proteins><span>Download SARS-CoV-2 proteins</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2how-tosvalidation-li><a href=/datasets/docs/v2/how-tos/validation/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2how-tosvalidation><span>File validation</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-datasetsdocsv2tutorials-li><a href=/datasets/docs/v2/tutorials/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2tutorials><span>Tutorials</span></a><ul class="ul-2 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2tutorialsortholog-get-one-isoform-li><a href=/datasets/docs/v2/tutorials/ortholog-get-one-isoform/ title="Get one protein per gene from a set of orthologs" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2tutorialsortholog-get-one-isoform><span>Get one protein from an ortholog set</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2tutorialsrename-files-li><a href=/datasets/docs/v2/tutorials/rename-files/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2tutorialsrename-files><span>Rename downloaded files</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2tutorialsdownload-ortholog-dataset-li><a href=/datasets/docs/v2/tutorials/download-ortholog-dataset/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2tutorialsdownload-ortholog-dataset><span>Retrieve ortholog data and metadata</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2tutorialsworking-with-jsonl-data-reports-li><a href=/datasets/docs/v2/tutorials/working-with-jsonl-data-reports/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2tutorialsworking-with-jsonl-data-reports><span>Working with JSON Lines data reports</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-datasetsdocsv2api-li><a href=/datasets/docs/v2/api/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2api><span>API</span></a><ul class="ul-2 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2apirest-api-li><a href=/datasets/docs/v2/api/rest-api/ title="NCBI Datasets v2 REST API" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2apirest-api><span>REST API</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2apiapi-keys-li><a href=/datasets/docs/v2/api/api-keys/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2apiapi-keys><span>API keys</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2apilanguages-li><a href=/datasets/docs/v2/api/languages/ title="Supported programming languages" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2apilanguages><span>Programming Languages</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2apideprecated-apis-li><a href=/datasets/docs/v2/api/deprecated-apis/ title="Retired API Endpoints" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2apideprecated-apis><span>Retired Endpoints</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child active-path" id=m-datasetsdocsv2policies-annotation-li><a href=/datasets/docs/v2/policies-annotation/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2policies-annotation><span>NCBI Genome Data Processing</span></a><ul class="ul-2 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-datasetsdocsv2policies-annotationgenome-processing-li><a href=/datasets/docs/v2/policies-annotation/genome-processing/ title="NCBI Genome Data Processing" class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2policies-annotationgenome-processing><span>Genome Data Processing</span></a><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationgenome-processingversion-status-li><a href=/datasets/docs/v2/policies-annotation/genome-processing/version-status/ title="Assembly Versioning and Status" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationgenome-processingversion-status><span>Assembly version and status</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationgenome-processingreference-selection-li><a href=/datasets/docs/v2/policies-annotation/genome-processing/reference-selection/ title="Selecting Reference Genomes" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationgenome-processingreference-selection><span>Reference Genomes</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationgenome-processingrefseq-selection-li><a href=/datasets/docs/v2/policies-annotation/genome-processing/refseq-selection/ title="Genomes Selected for RefSeq Annotation" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationgenome-processingrefseq-selection><span>RefSeq Genomes</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationgenome-processinggenome_notes-li><a href=/datasets/docs/v2/policies-annotation/genome-processing/genome_notes/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationgenome-processinggenome_notes><span>Genome Notes</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationgenome-processingtype-material-li><a href=/datasets/docs/v2/policies-annotation/genome-processing/type-material/ title="What is Type Material?" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationgenome-processingtype-material><span>Type Material</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-datasetsdocsv2policies-annotationpipelines-li><a href=/datasets/docs/v2/policies-annotation/pipelines/ title="NCBI RefSeq Genome Annotation Pipelines" class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2policies-annotationpipelines><span>Genome Annotation Pipelines</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-datasetsdocsv2policies-annotationquality-li><a href=/datasets/docs/v2/policies-annotation/quality/ title="NCBI Genome Quality Analysis" class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2policies-annotationquality><span>Genome Quality Analysis</span></a><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2policies-annotationqualitycontamination-li><a href=/datasets/docs/v2/policies-annotation/quality/contamination/ title="NCBI Contamination Screening" class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2policies-annotationqualitycontamination><span>Contamination Screening</span></a><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationqualitycontaminationfcs-contamination-li><a href=/datasets/docs/v2/policies-annotation/quality/contamination/fcs-contamination/ title="Foreign Contamination Screen (FCS)" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationqualitycontaminationfcs-contamination><span>FCS</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationqualitycontaminationani-contamination-li><a href=/datasets/docs/v2/policies-annotation/quality/contamination/ani-contamination/ title="Average Nucleotide Identity (ANI)" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationqualitycontaminationani-contamination><span>ANI</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationqualityani-li><a href=/datasets/docs/v2/policies-annotation/quality/ani/ title="Average Nucleotide Identity (ANI)" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationqualityani><span>ANI Overview</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationqualitybusco-li><a href=/datasets/docs/v2/policies-annotation/quality/busco/ title="Benchmarking Universal Single-Copy Orthologs (BUSCO) Analysis" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationqualitybusco><span>BUSCO</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2policies-annotationqualitycheckm-li><a href=/datasets/docs/v2/policies-annotation/quality/checkm/ title="CheckM Analysis" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationqualitycheckm><span>CheckM</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child active-path" id=m-datasetsdocsv2policies-annotationdata-model-li><a href=/datasets/docs/v2/policies-annotation/data-model/ title="The NCBI Genome Assembly Data Model" class="align-left ps-0 active td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationdata-model><span class=td-sidebar-nav-active-item>Data model</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-datasetsdocsv2policies-annotationgenomeftp-li><a href=/datasets/docs/v2/policies-annotation/genomeftp/ title="NCBI Genomes FTP" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationgenomeftp><span>Genomes FTP</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-datasetsdocsv2policies-annotationortholog-calculation-li><a href=/datasets/docs/v2/policies-annotation/ortholog-calculation/ title="How Are Orthologs Calculated?" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2policies-annotationortholog-calculation><span>Ortholog Calculation</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-datasetsdocsv2troubleshooting-li><a href=/datasets/docs/v2/troubleshooting/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2troubleshooting><span>FAQs and troubleshooting</span></a><ul class="ul-2 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2troubleshootingfaq-li><a href=/datasets/docs/v2/troubleshooting/faq/ title=FAQs class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2troubleshootingfaq><span>Frequently asked Questions</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2troubleshootingmac-zip-bug-li><a href=/datasets/docs/v2/troubleshooting/mac-zip-bug/ title="Mac zip archive bugs" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2troubleshootingmac-zip-bug><span>Mac zip bugs</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-datasetsdocsv2reference-docs-li><a href=/datasets/docs/v2/reference-docs/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docs><span>Reference</span></a><ul class="ul-2 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-line-li><a href=/datasets/docs/v2/reference-docs/command-line/ title="Command line tool reference" class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-line><span>Command line</span></a><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformat-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedataformat><span>dataformat</span></a><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsv-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedataformattsv><span>tsv</span></a><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_genome-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_genome/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_genome><span>genome</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_genome-seq-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_genome-seq/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_genome-seq><span>genome-seq</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_gene-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_gene/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_gene><span>gene</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_gene-product-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_gene-product/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_gene-product><span>gene-product</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_virus-genome-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_virus-genome/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_virus-genome><span>virus-genome</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_virus-annotation-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_virus-annotation/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_virus-annotation><span>virus-annotation</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_microbigge-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_microbigge/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_microbigge><span>microbigge</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_prok-gene-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_prok-gene/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_prok-gene><span>prok-gene</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_prok-gene-location-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_prok-gene-location/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_prok-gene-location><span>prok-gene-location</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_genome-annotations-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_genome-annotations/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_genome-annotations><span>genome-annotations</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_taxonomy-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_taxonomy/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_taxonomy><span>taxonomy</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_organelle-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/tsv/dataformat_tsv_organelle/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformattsvdataformat_tsv_organelle><span>organelle</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexcel-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedataformatexcel><span>excel</span></a><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_genome-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_genome/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_genome><span>genome</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_genome-seq-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_genome-seq/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_genome-seq><span>genome-seq</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_gene-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_gene/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_gene><span>gene</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_gene-product-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_gene-product/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_gene-product><span>gene-product</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_virus-genome-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_virus-genome/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_virus-genome><span>virus-genome</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_virus-annotation-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_virus-annotation/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_virus-annotation><span>virus-annotation</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_microbigge-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_microbigge/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_microbigge><span>microbigge</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_prok-gene-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_prok-gene/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_prok-gene><span>prok-gene</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_prok-gene-location-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_prok-gene-location/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_prok-gene-location><span>prok-gene-location</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_genome-annotations-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_genome-annotations/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_genome-annotations><span>genome-annotations</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_taxonomy-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_taxonomy/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_taxonomy><span>taxonomy</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_organelle-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/excel/dataformat_excel_organelle/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatexceldataformat_excel_organelle><span>organelle</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatdataformat_catalog-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/dataformat_catalog/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatdataformat_catalog><span>catalog</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletion-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/completion/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletion><span>completion</span></a><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletiondataformat_completion_bash-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/completion/dataformat_completion_bash/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletiondataformat_completion_bash><span>bash</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletiondataformat_completion_zsh-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/completion/dataformat_completion_zsh/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletiondataformat_completion_zsh><span>zsh</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletiondataformat_completion_fish-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/completion/dataformat_completion_fish/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletiondataformat_completion_fish><span>fish</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletiondataformat_completion_powershell-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/completion/dataformat_completion_powershell/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatcompletiondataformat_completion_powershell><span>powershell</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedataformatdataformat_version-li><a href=/datasets/docs/v2/reference-docs/command-line/dataformat/dataformat_version/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedataformatdataformat_version><span>version</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasets-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasets><span>datasets</span></a><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummary-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetssummary><span>summary</span></a><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygene-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/gene/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygene><span>gene</span></a><ul class="ul-6 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_gene-id-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/gene/datasets_summary_gene_gene-id/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_gene-id><span>gene-id</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_symbol-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/gene/datasets_summary_gene_symbol/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_symbol><span>symbol</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_accession-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/gene/datasets_summary_gene_accession/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_accession><span>accession</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_taxon-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/gene/datasets_summary_gene_taxon/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_taxon><span>taxon</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_locus-tag-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/gene/datasets_summary_gene_locus-tag/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenedatasets_summary_gene_locus-tag><span>locus-tag</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenome-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/genome/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenome><span>genome</span></a><ul class="ul-6 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenomedatasets_summary_genome_accession-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/genome/datasets_summary_genome_accession/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenomedatasets_summary_genome_accession><span>accession</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenomedatasets_summary_genome_taxon-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/genome/datasets_summary_genome_taxon/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarygenomedatasets_summary_genome_taxon><span>taxon</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummaryvirus-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/virus/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetssummaryvirus><span>virus</span></a><ul class="ul-6 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummaryvirusgenome-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/virus/genome/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetssummaryvirusgenome><span>genome</span></a><ul class="ul-7 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummaryvirusgenomedatasets_summary_virus_genome_taxon-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/virus/genome/datasets_summary_virus_genome_taxon/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummaryvirusgenomedatasets_summary_virus_genome_taxon><span>taxon</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummaryvirusgenomedatasets_summary_virus_genome_accession-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/virus/genome/datasets_summary_virus_genome_accession/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummaryvirusgenomedatasets_summary_virus_genome_accession><span>accession</span></a></li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarytaxonomy-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/taxonomy/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarytaxonomy><span>taxonomy</span></a><ul class="ul-6 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarytaxonomydatasets_summary_taxonomy_taxon-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/summary/taxonomy/datasets_summary_taxonomy_taxon/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetssummarytaxonomydatasets_summary_taxonomy_taxon><span>taxon</span></a></li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownload-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownload><span>download</span></a><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgene-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/gene/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgene><span>gene</span></a><ul class="ul-6 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_gene-id-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/gene/datasets_download_gene_gene-id/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_gene-id><span>gene-id</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_symbol-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/gene/datasets_download_gene_symbol/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_symbol><span>symbol</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_accession-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/gene/datasets_download_gene_accession/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_accession><span>accession</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_taxon-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/gene/datasets_download_gene_taxon/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_taxon><span>taxon</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_locus-tag-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/gene/datasets_download_gene_locus-tag/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenedatasets_download_gene_locus-tag><span>locus-tag</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenome-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/genome/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenome><span>genome</span></a><ul class="ul-6 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenomedatasets_download_genome_accession-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/genome/datasets_download_genome_accession/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenomedatasets_download_genome_accession><span>accession</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenomedatasets_download_genome_taxon-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/genome/datasets_download_genome_taxon/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadgenomedatasets_download_genome_taxon><span>taxon</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadtaxonomy-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/taxonomy/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadtaxonomy><span>taxonomy</span></a><ul class="ul-6 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadtaxonomydatasets_download_taxonomy_taxon-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/taxonomy/datasets_download_taxonomy_taxon/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadtaxonomydatasets_download_taxonomy_taxon><span>taxon</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirus-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/virus/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirus><span>virus</span></a><ul class="ul-6 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirusgenome-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/virus/genome/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirusgenome><span>genome</span></a><ul class="ul-7 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirusgenomedatasets_download_virus_genome_accession-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/virus/genome/datasets_download_virus_genome_accession/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirusgenomedatasets_download_virus_genome_accession><span>accession</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirusgenomedatasets_download_virus_genome_taxon-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/virus/genome/datasets_download_virus_genome_taxon/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirusgenomedatasets_download_virus_genome_taxon><span>taxon</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirusdatasets_download_virus_protein-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/download/virus/datasets_download_virus_protein/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdownloadvirusdatasets_download_virus_protein><span>protein</span></a></li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetsdatasets_rehydrate-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/datasets_rehydrate/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetsdatasets_rehydrate><span>rehydrate</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletion-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/completion/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletion><span>completion</span></a><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletiondatasets_completion_bash-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/completion/datasets_completion_bash/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletiondatasets_completion_bash><span>bash</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletiondatasets_completion_zsh-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/completion/datasets_completion_zsh/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletiondatasets_completion_zsh><span>zsh</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletiondatasets_completion_fish-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/completion/datasets_completion_fish/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletiondatasets_completion_fish><span>fish</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletiondatasets_completion_powershell-li><a href=/datasets/docs/v2/reference-docs/command-line/datasets/completion/datasets_completion_powershell/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docscommand-linedatasetscompletiondatasets_completion_powershell><span>powershell</span></a></li></ul></li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docsfile-formats-li><a href=/datasets/docs/v2/reference-docs/file-formats/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docsfile-formats><span>File formats</span></a><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docsfile-formatsannotation-files-li><a href=/datasets/docs/v2/reference-docs/file-formats/annotation-files/ title="Annotation file formats" class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docsfile-formatsannotation-files><span>Annotation files</span></a><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsfile-formatsannotation-filesabout-ncbi-gbff-li><a href=/datasets/docs/v2/reference-docs/file-formats/annotation-files/about-ncbi-gbff/ title="GBFF format" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsfile-formatsannotation-filesabout-ncbi-gbff><span>GBFF</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsfile-formatsannotation-filesabout-ncbi-gff3-li><a href=/datasets/docs/v2/reference-docs/file-formats/annotation-files/about-ncbi-gff3/ title="GFF3 format" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsfile-formatsannotation-filesabout-ncbi-gff3><span>GFF3</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docsfile-formatsmetadata-files-li><a href=/datasets/docs/v2/reference-docs/file-formats/metadata-files/ title="Metadata file formats" class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docsfile-formatsmetadata-files><span>Metadata files</span></a><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsfile-formatsmetadata-filesabout-json-and-tabular-li><a href=/datasets/docs/v2/reference-docs/file-formats/metadata-files/about-json-and-tabular/ title="Summary of JSON, JSON Lines, and CSV/TSV tabular formats" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsfile-formatsmetadata-filesabout-json-and-tabular><span>Summary of metadata file formats</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsfile-formatsmetadata-fileswhy-jsonl-li><a href=/datasets/docs/v2/reference-docs/file-formats/metadata-files/why-jsonl/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsfile-formatsmetadata-fileswhy-jsonl><span>Why JSON and JSON Lines</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsfile-formatsmetadata-filestools-for-jsonl-li><a href=/datasets/docs/v2/reference-docs/file-formats/metadata-files/tools-for-jsonl/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsfile-formatsmetadata-filestools-for-jsonl><span>Tools for JSON and JSON Lines</span></a></li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsrelease-notes-li><a href=/datasets/docs/v2/reference-docs/release-notes/ title="NCBI Datasets release notes" class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docsrelease-notes><span>Release notes</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docsdata-reports-li><a href=/datasets/docs/v2/reference-docs/data-reports/ title="Data report schemas" class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docsdata-reports><span>Report schemas</span></a><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportsgene-li><a href=/datasets/docs/v2/reference-docs/data-reports/gene/ title="Gene report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportsgene><span>Gene</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportsgene-product-li><a href=/datasets/docs/v2/reference-docs/data-reports/gene-product/ title="Gene product report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportsgene-product><span>Gene product</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportsgenome-assembly-li><a href=/datasets/docs/v2/reference-docs/data-reports/genome-assembly/ title="Genome assembly report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportsgenome-assembly><span>Genome assembly</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportsgenome-sequence-li><a href=/datasets/docs/v2/reference-docs/data-reports/genome-sequence/ title="Genome sequence report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportsgenome-sequence><span>Genome sequence</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportsmicrobigge-li><a href=/datasets/docs/v2/reference-docs/data-reports/microbigge/ title="MicroBIGG-E report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportsmicrobigge><span>MicroBIGG-E</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportsprokaryote-gene-li><a href=/datasets/docs/v2/reference-docs/data-reports/prokaryote-gene/ title="Prokaryote gene report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportsprokaryote-gene><span>Prok. gene</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportsprokaryote-gene-location-li><a href=/datasets/docs/v2/reference-docs/data-reports/prokaryote-gene-location/ title="Prokaryote gene location report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportsprokaryote-gene-location><span>Prok. gene location</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportstaxonomy-li><a href=/datasets/docs/v2/reference-docs/data-reports/taxonomy/ title="Taxonomy report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportstaxonomy><span>Taxonomy</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportstaxonomy-names-li><a href=/datasets/docs/v2/reference-docs/data-reports/taxonomy-names/ title="Taxonomy names report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportstaxonomy-names><span>Taxonomy names</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportsvirus-li><a href=/datasets/docs/v2/reference-docs/data-reports/virus/ title="Virus report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportsvirus><span>Virus</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-reportsvirus-annotation-li><a href=/datasets/docs/v2/reference-docs/data-reports/virus-annotation/ title="Virus annotation report" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-reportsvirus-annotation><span>Virus annotation</span></a></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-datasetsdocsv2reference-docsdata-packages-li><a href=/datasets/docs/v2/reference-docs/data-packages/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__section" id=m-datasetsdocsv2reference-docsdata-packages><span>Data packages</span></a><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-packagesgene-package-li><a href=/datasets/docs/v2/reference-docs/data-packages/gene-package/ title="NCBI Datasets Gene Package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-packagesgene-package><span>Gene package</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-packagesgenome-li><a href=/datasets/docs/v2/reference-docs/data-packages/genome/ title="NCBI Datasets Genome Package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-packagesgenome><span>Genome package</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-packagestaxonomy-li><a href=/datasets/docs/v2/reference-docs/data-packages/taxonomy/ title="NCBI Datasets Taxonomy Package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-packagestaxonomy><span>Taxonomy package</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-datasetsdocsv2reference-docsdata-packagesvirus-genome-li><a href=/datasets/docs/v2/reference-docs/data-packages/virus-genome/ title="NCBI Datasets Virus Data Package" class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2reference-docsdata-packagesvirus-genome><span>Virus data package</span></a></li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-datasetsdocsv2glossary-li><a href=/datasets/docs/v2/glossary/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2glossary><span>Glossary</span></a></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-datasetsdocsv2citing-datasets-li><a href=/datasets/docs/v2/citing-datasets/ class="align-left ps-0 td-sidebar-link
td-sidebar-link__page" id=m-datasetsdocsv2citing-datasets><span>Cite Us</span></a></li></ul></li></ul></nav><script src=/datasets/docs/v2/js/sidebar-tree.js></script><div id=doc-version-selector-container><div>Documentation version</div><select><option value=v1>CLI v13.x (API v1)</option><option value=v2>CLI v16+ (API v2)</option></select>
<a href=/datasets/docs/v2/troubleshooting/faq/#which-version-of-the-documentation-should-i-use>Learn more</a></div></div></div><div class="d-none d-xl-block col-xl-2 td-sidebar-toc d-print-none"></div><main class="col-12 col-md-9 col-xl-8 pl-md-5" role=main><div id=possible-banner></div><nav aria-label=breadcrumb class=d-print-none><ol class="breadcrumb spb-1"><li class=breadcrumb-item><a href=/datasets/docs/v2/>Documentation</a></li><li class=breadcrumb-item><a href=/datasets/docs/v2/policies-annotation/>NCBI Genome Data Processing</a></li><li class="breadcrumb-item active" aria-current=page><a href=/datasets/docs/v2/policies-annotation/data-model/>Data model</a></li></ol></nav><h1 class="mb-4 font-weight-bold">The NCBI Genome Assembly Data Model</h1><p class="lead pb-2"></p><div class="d-xl-none td-toc td-toc--inline d-print-none"></div><style>.td-content table{border:1px solid #ccc}@media screen and (min-width:600px){.td-content table{display:table}}@media screen and (max-width:400px){.td-content table td{white-space:nowrap!important}}.td-content table th{white-space:nowrap}summary>h3{display:inline-block}</style><div class=td-content><h1>The NCBI Genome Assembly Data Model</h1><header class=article-meta></header><p>NCBI provides stable accessions and data tracking for genome assemblies. It stores the names and identifiers for the sequences in each genome assembly as well as the associated metadata (such as assembly name, date of submission, name of submitter, details of sequenced organism), assembly statistics, and the organization of its component sequences into scaffolds and chromosomes. NCBI uses the Genome Reference Consortium (GRC) <a href=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3130012/>data model</a>, reflecting the complexity of the modern genome assembly (see <strong>Figure 1</strong> below). The data model accounts for all sequences known to represent an organisms genome, including those that are not yet assigned to chromosome assemblies. Assemblies may be of different levels (contig level, scaffold level, chromosome level, or complete genomes).</p><p>All assemblies contain a unit termed “primary assembly.” This includes non-redundant sequences (chromosomes and/or scaffolds) that represent an organisms haploid genome. Additional assembly units that may be included are organelle genomes (mitochondria, plastids), alternate loci (sequences aligned to the primary assembly that provide alternate representations of corresponding loci found in the primary assembly), and genome patches that are sequences representing assembly updates.</p><figure><img src=/datasets/docs/v2/data_model.svg alt="NCBI Assembly Data Model"><figcaption><b>Figure 1</b>: A graphical representation of the NCBI assembly model showing the genome of a eukaryote with three assembly units: a primary assembly containing two nuclear chromosomes, a mitochondrial genome, and an alternate locus group containing sequences from two chromosomes.</figcaption></figure><br><p>Details about the assembly model are available in the publication “<a href=https://pubmed.ncbi.nlm.nih.gov/26578580/>Assembly: a resource for assembled genomes at NCBI</a>.” For more information on terms used in the model and descriptions of additional categories of genome assemblies, please visit the <a href=/datasets/docs/v2/glossary/>Glossary</a>.</p><p><strong>Referencing Genome Assembly Data</strong></p><p>When assemblies are submitted to NCBIs GenBank or another member database of the International Nucleotide Sequence Database Collaboration (<a href=https://www.insdc.org/>INSDC</a>), individual sequences associated with the assembly are assigned a unique accession number followed by a dot and a version (e.g., <a href=https://www.ncbi.nlm.nih.gov/nuccore/CM000663.2>CM000663.2</a>). If a sequence is updated, the accession will remain the same, but the version will increase, thus allowing updates to be tracked. Metadata updates do not result in a version increment.</p><p>In much the same way, the NCBI assigns an unambiguous <em>accession.version</em> at the assembly level, which is specific to the precise set of individual sequences that are part of the genome assembly. A change in version at the assembly level indicates sequence updates to one or more component sequences. To learn more, see the <a href=/datasets/docs/v2/policies-annotation/genome-processing/version-status/>Assembly Versioning and Status</a> documentation. NCBI uses identifiers to distinguish between GenBank assemblies represented with a GCA_ prefix and RefSeq assemblies that begin with a GCF_ prefix. The latter are copies of GenBank assemblies used by RefSeq to annotate genome assemblies. To learn more about the RefSeq annotation process, see <a href=https://www.ncbi.nlm.nih.gov/refseq/annotation_euk/>Eukaryotic Genome Annotation at NCBI</a>.</p>Generated February 26, 2025</div><div class=c-global-meta-links><div class="td-page-meta ml-2 pb-1 pt-2 mb-0"></div></div></main></div></div></div><footer><section class=icon-section><div id=icon-section-header class=icon-section_header>Follow NCBI</div><div class="grid-container container"><div class=icon-section_container><a class=footer-icon id=footer_twitter href=https://twitter.com/ncbi aria-label=Twitter><svg width="40" height="40" viewBox="0 0 40 37" fill="none" xmlns="http://www.w3.org/2000/svg"><title>Twitter</title><g id="twitterx1008"><path id="path1008" d="M6.06736 7 16.8778 20.8991 6.00001 32.2H10.2l8.4-9.1 7.068 9.1H34L22.8 17.5 31.9 7H28.4l-7.7 8.4L14.401 7H6.06898 6.06736zM9.66753 8.73423H12.9327l16.8 21.73157h-3.163L9.66753 8.73423z" fill="#5b616b"/></g></svg></a><a class=footer-icon id=footer_facebook 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