This tag is used to refer to an object created earlier by using the id name for the element.
The constructor of this element needs to be the id name of the object which has already been processed, or in
the id cache (which can be manipulated manually).
This tag is used to include another XML document, an element in another XML document, or an element in the
current XML document. Unlike idref which references the same object created earlier,
this tag parses the element referenced (which may or may not have been processed) to create a new object. The
constructor attribute of this element needs to be in "resource", "resource#id", or "#id" format, where resource
refers to the xml document path that can be loaded using ClassLoader.
This tag does exactly nothing. The purpose is to prevent the child objects to be added to the parent objects.
This tag create a null reference, which can be used to set or add to parent explicitly. Normally, CookXml
would discard null references, but this tag forces itself to be added to the parent. Use this tag when you
want to explicitly add/set null values.
This tag can be used either to reference an id object (same as idref, but with "id:" prefix), or a variable
inside the variable object (same as varref, but with "var:" prefix), or to construct an arbitrary object
that has a default constructor with the name of the class as the value for the constructor attribute of the