The Experts below are selected from a list of 189 Experts worldwide ranked by ideXlab platform

Wolfgang May - One of the best experts on this subject based on the ideXlab platform.

  • XPath-logic and XPathLog: A logic-programming style XML data manipulation language
    Theory and Practice of Logic Programming, 2004
    Co-Authors: Wolfgang May
    Abstract:

    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.

  • xpathlog a declarative native xml data manipulation language
    International Database Engineering and Applications Symposium, 2001
    Co-Authors: Wolfgang May
    Abstract:

    XPathLog is a logic-based language for manipulating and integrating XML data. It extends the XPath query language with Prolog-style variables. Due to the close relationship with XPath, the semantics of rules is easy to grasp. 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. The formal semantics is defined wrt. a graph Herbrand structure which covers the XML tree data model. XPathLog has been implemented in LoPiX.

  • IDEAS - XPathLog: a declarative, native XML data manipulation language
    Proceedings 2001 International Database Engineering and Applications Symposium, 1
    Co-Authors: Wolfgang May
    Abstract:

    XPathLog is a logic-based language for manipulating and integrating XML data. It extends the XPath query language with Prolog-style variables. Due to the close relationship with XPath, the semantics of rules is easy to grasp. 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. The formal semantics is defined wrt. a graph Herbrand structure which covers the XML tree data model. XPathLog has been implemented in LoPiX.

Hiroshi Tamura - One of the best experts on this subject based on the ideXlab platform.

Motohide Umano - One of the best experts on this subject based on the ideXlab platform.

I Hatono - One of the best experts on this subject based on the ideXlab platform.

T Imada - One of the best experts on this subject based on the ideXlab platform.