确保查询与不断发展的XML模式的兼容性
Ensuring Query Compatibility with Evolving XML Schemas
摘要：
在XML应用程序的生存周期中，模式和查询都可能从一个版本更改为另一个版本。模式演变可能会影响查询结果，并可能产生的数据的有效性。如今，一个挑战是评估和适应这些变化对快速发展的XML应用程序的影响。本文提出了一个逻辑框架和工具，用于验证涉及模式和查询的前向/后向兼容性问题。首先，它允许分析模式之间的关系。其次，它允许XML设计人员识别必须重新公式化的查询，以便跨连续的模式版本产生预期的结果。第三，它允许更精确地检查模式变化对查询的影响，从而促进它们的重新表达。
英文摘要：
During the life cycle of an XML application, both schemas and queries may change from one version to another. Schema evolutions may affect query results and potentially the validity of produced data. Nowadays, a challenge is to assess and accommodate the impact of theses changes in rapidly evolving XML applications. This article proposes a logical framework and tool for verifying forward/backward compatibility issues involving schemas and queries. First, it allows analyzing relations between schemas. Second, it allows XML designers to identify queries that must be reformulated in order to produce the expected results across successive schema versions. Third, it allows examining more precisely the impact of schema changes over queries, therefore facilitating their reformulation.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
