(example of XML) contains a single well-formed XML fragment demonstrating the use of some XML element or attribute, in which the egXML element itself functions as the root element. indicates the intended validity of the example with respect to a schema. the example is intended to be fully valid, assuming that its root element can be used as the root element in the schema concerned. the example could be transformed into a valid document by inserting any number of valid attributes and child elements anywhere within it; it is valid against a version of the schema concerned in which every data, list, element, or attribute element has been made optional. the example is not intended to be valid, and contains deliberate errors.