基于XML的试题库模型与实现

Model and Implementation of Itembank Based on XML

由于试题的多样性的类型及半结构性的内容,实现试题规范的数据结构较为困难,造成现有的试题库系统的试题类型较少和内容格式单一。使用XML元数据表示试题的内容,可有效解决上述问题,论文提出一种基于XML的试题库模型,建立具有较高查询效率的试题库组织结构,在系统原型实现上,利用关系数据库的查询性能和XML技术的表现能力,较好地解决了试题库系统对试题类型多样性和查询效率的支持。

Implementation of item normalized data structure is relatively difficult owing to the diversity of item type and the semi-structure of item content.This results in fewer item type and single content format in present itembank systems. These questions can be settled effectively using XML metadata technology to construct the item structure and content. This article presents a XML-based itembank model and structure having relatively high querying performance. By combining the querying performance of relational database and the expression of XML technology, the itembank prototype was developed for supporting many types of item and querying performance.