Efficient extraction of xml content stored in a lob

Details Efficient extraction of xml content stored in a lob Efficient extraction of xml content stored in a lob

G - Physics

06

F

G06F 17/30 (2006.01)

Patent

CA 2570462

A method and system are provided for extracting a valid, self-contained fragment for a node in a XML document stored in a database management system. An XML index is used to identify a location in which XML fragment data corresponding to the node is located. Ancestors of the node are identified and examined for any information needed for the proper interpretation of the fragment. If an ancestor node contains such needed information, this information is patched into the XML fragment to ensure that the fragment is a valid, self-contained XML fragment.

Cette invention concerne un procédé et un système permettant d'extraire un fragment autonome valide pour un noeud dans un document XML stocké dans un système de gestion de bases de données. Un index XML est utilisé pour identifier un emplacement dans lequel se trouvent des données de fragment XML correspondant au noeud. Des ancêtres du noeud sont identifiés et examinés pour savoir s'ils contiennent des informations nécessaires à l'interprétation correcte du fragment. Si un noeud ancêtre contient de telles informations, celles-ci sont intégrées dans le fragment XML pour garantir que le fragment est bien un fragment XML autonome valide.

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