Definitions for "Parent element"
A radioactive element that spontaneously decays into a new substance. The product of this decay is known as a "daughter" element.
An element that may contain other elements, referred to as subelements of the parent element. See also Subelement.
An element in which another (child) element is nested. For example: parent_element child_element /child_element /parent_element
Keywords:  hierarchy, segment, begins, data
A data segment that begins a hierarchy.