> For the complete documentation index, see [llms.txt](https://support.iafcertsearch.org/api-developer-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.iafcertsearch.org/api-developer-guide/api-zh/data-handling/matching-existing-data.md).

# 匹配现有数据

一般来说，现有数据是根据唯一标识进行匹配的，并且系统使用最新提供的信息进行扩展/覆盖。