Abstract
Although key definitions are adopted by XML Schema, validating hierarchical key constraints over XML document faces many difficult problems. The paper begins by proposing a systematic architecture for efficient XML key validation and incremental validation using XPath and structure checking. We propose a key value document generation algorithm and present how a key value document and its schema can be designed to check whether predefined key constraints are satisfied. Then we present a novel method that can support incremental validation of XML key constraints by incremental maintenance of key value document.
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