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Posted by / 21-Apr-2020 14:50

Semantic constraint based xml updating

Consequently, replacing the value of a node leaves the target with either a single text node or no descendants at all. An iterative approach helps to modify multiple nodes within a single statement.Nodes on the descendant- or attribute-axis of the target are not affected. is copied and subsequently assigned a new QName using the rename expression. This article aims to provide a very quick and basic introduction to the XQUF. Base X offers a complete implementation of the XQuery Update Facility (XQUF).

As a consequence, element is inserted within the same snapshot and is therefore not yet visible to the user.

First, some examples for update expressions are given.

After that, the challenges are addressed that arise due to the functional semantics of the language. expression is different, as modified nodes are copied in advance and the original databases remain untouched. You can find a few examples and additional information below.

For the user, this means that updates are only visible after the end of a snapshot.

It may be surprising to see in the lower part of this list.

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