Efficient piece-wise updates of binary encoded xml data

G - Physics – 06 – F

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G06F 17/30 (2006.01)

Patent

CA 2651637

An XML document can be represented in a compact binary form that maintains all of the features of XML data in a useable form. In response to a request for a modification (e.g., insert, delete or update a node) to an XML document that is stored in the compact binary form, a certain representation of the requested modification is computed for application directly to the binary form of the document. Thus, the requested modification is applied directly to the persistently stored binary form without constructing an object tree or materializing the XML document into a corresponding textual form. Taking into account the nature of the binary form in which the document is encoded, the bytes that actually require change are identified, including identifying where in the binary representation the corresponding actual changes need to be made.

L'invention concerne un document XML pouvant être représenté sous une forme binaire compacte permettant de conserver toutes les caractéristiques des données XML sous une forme utilisable. En réponse à une demande de modification (par exemple, une insertion, un effacement ou une mise à jour de noeud) à apporter à un document XML stocké sous la forme binaire compacte susmentionnée, une certaine représentation de la modification demandée est calculée pour une application directe sur la forme binaire du document. Ainsi, la modification demandée est appliquée directement sur la forme binaire stockée de manière persistante, sans construction d'un arbre objet, ni matérialisation du document XML sous une forme textuelle correspondante. Les octets nécessitant réellement une modification sont identifiés en tenant compte de la nature de la forme binaire sous laquelle le document est codé, cette identification implique d'identifier l'endroit de la représentation binaire où les modifications réelles correspondantes doivent s'effectuer.

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