If you want to do complex tree operations it is useful to have a lightweight class to store nodes and their relations.
QDomDocumentFragment stores a subtree of a document which does not necessarily represent a well-formed XML document.
QDomDocumentFragment is also useful if you want to group several nodes in a list and insert them all together as children of some node. In these cases
QDomDocumentFragment can be used as a temporary container for this list of children.
The most important feature of
QDomDocumentFragment is that it is treated in a special way by
appendChild() : instead of inserting the fragment itself, all the fragment’s children are inserted.
Constructs an empty document fragment.
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