xmlDocGetRootElementdoc
The function xmlDocGetRootElementdoc is part of the libxml2 library, a popular XML parsing toolkit. This function is used to retrieve the root element of an XML document. An XML document has a single root element, which is the outermost element that contains all other elements.
When you parse an XML document using libxml2, you obtain an xmlDocPtr, which represents the entire document
If the document is empty or malformed in such a way that it lacks a root element,