DDH垂直搜索引擎商业版，是目前互联网中唯一可以商业运作的垂直搜索引擎系统，由JAVA语言开发，可以运行在大规模集群中的网络信息整合系统。DDH整合Nutch（开源搜索引擎系统），UCI（网页信息抽取系统）和SOLR（企业级搜索应用服务器）。无论从可扩展性，系统的性能方面还是稳定性方面，DDH垂直搜索引擎系统，都可以算的上顶级垂直搜索引擎系统之一。-DDH vertical search engine business edition, is currently the only commercial operation of the Internet to the vertical search engine system, developed by the JAVA language, you can run on a large cluster of network information integration system. DDH integrated Nutch (open source search engine system), UCI (Web information extraction system) and SOLR (enterprise level search application server). Whether the performance of the system or the stability of the system, the DDH vertical search engine system, can be considered one of the top vertical search engine system.