文档信息检索 meaning in English

dir document information retrieval

First , this thesis has studied classic information retrieval for document from information retrieval theory , description by math , retrieval model and so on , designed and implemented a content retrieval experimental system based on vector space model
本文首先针对xml文档的内容信息，从信息检索原理、数学描述、检索模型等方面较全面地研究了传统的文档信息检索技术，设计并实现了一个基于向量空间模型的内容检索试验系统。