Incremental Validation of XML Documents

We investigate the incremental validation of XML documents with respect to DTDs and XML Schemas, under updates consisting of element tag renamings, insertions and deletions. DTDs are modeled as extended context-free grammars and XML Schemas are abstracted as "specialized DTDs", allowing to decouple element types from element tags. For DTDs, we exhibit an O(mlogn) incremental validation algorithm using an auxiliary structure of size O(n), where n is the size of the document and m the number of updates. For specialized DTDs, we provide an O(mlog2 n) incremental algorithm, again using an auxiliary structure of size O(n). This is a signi cant improvement over brute-force re-validation from scratch.

• Type: Conference
• Year: 2003
• Where: ICDT
• Authors: Yannis Papakonstantinou, Victor Vianu
• Keywords: Database, Element Tags, ICDT 2003, Incremental Validation, XML Schemas