Manipulating the node-tree hierarchy
You can restructure an XML node tree by rearranging its nodes. One
means of manipulating nodes involves detaching a child node from its
parent node. This can be accomplished with the Detach method, as in the
following example.
The root element of a PBDOM_DOCUMENT object named pbdom_doc is
obtained using the GetRootElement method:
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pbdom_obj = pbdom_doc.GetRootElement() |
The root element is detached from the PBDOM_DOCUMENT object, which
is the parent node of the root element:
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pbdom_obj.Detach() |
PBDOM provides the SetParentObject method to make an object a
child of another object.
Checking for parent node
The GetParentObject method can be used to determine whether an
element has a parent object, as in the following example:
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pbdom_parent_obj = pbdom_obj.GetParentObject() if not IsValid(pbdom_parent_obj) then MessageBox ("Invalid", "Root Element has no Parent") end if |
If the object on which GetParentObject is called has no parent
object, the function returns NULL.
PBDOM provides similar methods that return information about an
element’s place in an XML node tree. These methods include HasChildren,
which returns a boolean indicating whether an object has child objects,
and IsAncestorObjectOf, which indicates whether an object is the
ancestor of another object.