【摘要】 对XML数据建立有效的索引,是左右XML数据处理性能的重要因素.现有的索引和存储策略,大部分以丢失结构信息为代价,不利于结构查询和更新.XMLSchema作为描述XML文档结构信息的标准,对文档和查询路径进行有效性验证提供保证,基于此提出了一种基于XMLmSchema模式约束的XML文档数据索引技术SBXI,用于文档数据存储和查询的导航,提高了存储和查询效率,具有较高的空间利用率和较低的索引维护代价,并支持含有多个谓词的复杂查询.更多还原

【Abstract】 Indexing technique is significant for efficient XML data processing.A majority of existing index and storage strategies make against structure querying and updating XML which are at the cost of dropping of structure information.As the standard for describing document structure information,XML Schema provides a guarantee to validating the XML data and query path,herein Schema-based Constrained XML data indexing technique SBXI is suggested which can navigator data storage and query,improves the efficiency of data management.Moreover,this technique has upper space utilize efficiency and lower maintenance index expense,and sustains complex query of multi-predicative which do without traversing document tree.更多还原