# 1. Overview

## 1. About KVar

KVar (Korean Variant Archive) is a repository that collects, stores, and manages genomic variant data across a wide taxonomic range, including *Homo sapiens* and other organisms. 

KVar accommodates two major variant classes:

* **Single nucleotide polymorphisms (SNPs)** — collectively referring to small variants such as single-nucleotide variations and short insertions/deletions (indels) up to 50 base pairs (bp) in length.
* **Structural variants (SVs)** — large-scale genomic variations greater than 50 bp, including deletions (DEL), duplications (DUP), insertions (INS), inversions (INV), translocations (BND), and copy number variants (CNV).

KVar functions as a component of the **Korean BioData Station (K-BDS)**, ensuring national-scale variant data archiving and interoperability with international repositories (e.g., dbSNP, dbVar, EVA) through standardized metadata and accession systems.\
KVar exclusively accepts variant data generated by **sequencing-based detection methods**, such as next-generation sequencing (NGS) or long-read sequencing platforms, while data derived from **hybridization-based technologies** (e.g., microarrays or targeted capture assays) are not supported.

## 2. Key features of KVar

* **Integrated SNP and SV management**\
  KVar collects and manages both SNP and SV data within a single repository, each with separate accession systems.
* **Support for non-human species**\
  Variant data from *Homo sapiens* and various non-human organisms are accepted and curated.
* **Study-based summary statistics**\
  Variant information is organized by study (cohort) and includes allele frequency, position, and variant type.
* **Genome browser visualization**\
  Users can explore where each variant is located within the genome through an interactive browser.<br>

## 3. Cite


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