XPath-Logic and XPathLog: A Logic-Programming Style XML Data Manipulation Language
<|reference_start|>XPath-Logic and XPathLog: A Logic-Programming Style XML Data Manipulation Language: We define XPathLog as a Datalog-style extension of XPath. XPathLog provides a clear, declarative language for querying and manipulating XML whose perspectives are especially in XML data integration. In our characterization, the formal semantics is defined wrt. an edge-labeled graph-based model which covers the XML data model. We give a complete, logic-based characterization of XML data and the main language concept for XML, XPath. XPath-Logic extends the XPath language with variable bindings and embeds it into first-order logic. XPathLog is then the Horn fragment of XPath-Logic, providing a Datalog-style, rule-based language for querying and manipulating XML data. The model-theoretic semantics of XPath-Logic serves as the base of XPathLog as a logic-programming language, whereas also an equivalent answer-set semantics for evaluating XPathLog queries is given. In contrast to other approaches, the XPath syntax and semantics is also used for a declarative specification how the database should be updated: when used in rule heads, XPath filters are interpreted as specifications of elements and properties which should be added to the database.<|reference_end|>
@article{may2003xpath-logic,
    title={XPath-Logic and XPathLog: A Logic-Programming Style XML Data
  Manipulation Language},
    author={Wolfgang May},
    journal={arXiv preprint arXiv:cs/0311038},
    year={2003},
    archivePrefix={arXiv},
    eprint={cs/0311038},
    primaryClass={cs.DB}
}