WWW '99 Proceedings of the eighth international conference on World Wide Web
Regular expression pattern matching for XML
POPL '01 Proceedings of the 28th ACM SIGPLAN-SIGACT symposium on Principles of programming languages
XDuce: A statically typed XML processing language
ACM Transactions on Internet Technology (TOIT)
Searching XML documents via XML fragments
Proceedings of the 26th annual international ACM SIGIR conference on Research and development in informaion retrieval
CDuce: an XML-centric general-purpose language
ICFP '03 Proceedings of the eighth ACM SIGPLAN international conference on Functional programming
Patterns and types for querying XML documents
DBPL'05 Proceedings of the 10th international conference on Database Programming Languages
A full pattern-based paradigm for XML query processing
PADL'05 Proceedings of the 7th international conference on Practical Aspects of Declarative Languages
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XML documents annotated by different NLP tools accommodate multi-dimensional markup in a single hierarchy. To query such documents one has to account for different possible nesting structures of the annotations and the original markup of a document. We propose an expressive pattern language with extended semantics of the sequence pattern, supporting negation, permutation and regular patterns that is especially appropriate for querying XML annotated documents with multi-dimensional markup. The concept of fuzzy matching allows matching of sequences that contain textual fragments and known XML elements independently of how concurrent annotations and original markup are merged. We extend the usual notion of sequence as a sequence of siblings allowing matching of sequence elements on the different levels of nesting and abstract so from the hierarchy of the XML document. Extended sequence semantics in combination with other language patterns allows more powerful and expressive queries than queries based on regular patterns.