Question

what is the significane of root element? what is it alternative name

Answer 1

each XML document has exactly one single root it encloses all the other element and is therefore the sole parent element to all the other elements DOM level 1 defines for every XML document and object representation document of the document itself and an attribute or property on the document is called the root element

Answer 2

The parent element of all other elements in data instance is known as root element..
Also known as document element.