H2O Media Library是一个基于节点文档的媒体库，用来保存和传输大的多媒体材质集，用户可以通过目录、类别、或是关键字搜索浏览多媒体内容。-H2O Media Library is a joint document on the media repository for the preservation and transmission of large multimedia material sets, users can catalog, category, keyword search or browse multimedia content.