normal tree meaning in Chinese

本征树
规范树

In study of xml data model , we investigate the semi - structure charasteristics of xml : selfdescribe , graph - based model and irregular then the compedson and analysis of normal tree - structure model and node labeled direct graph are presented
对xml的数据模型，我们研究了xml的半结构化特性：自描述、图结构和不规则。然后对比分析了xml常见的树结构模型和图结构模型对xml查询基本操作的影响。
Making study of data model , first we investigate xml data model and semi - structure data model . and to research the semi - structure characteristics of xml : self - describe , graph - based model and irregular . then the analysis of normal tree - structure model is presented
在对数据模型的研究中，首先介绍了xml数据模型和半结构化的数据模型，研究了xml的半结构化特征：自描述、图结构和不规则，并分析了xml常见的树结构模型。