Outlook item(The basic element that holds information in Outlook (similar to a file in other programs). Items include e-mail messages, appointments, contacts, tasks, journal entries, notes, posted items, and documents)
element(A unit of information within a markup language that is defined by a tag, or a pair of tags surrounding some content, and includes any attributes defined within the initial tag)
XML element(An XML structure that consists of a start tag, an end tag, and the information between the tags. Elements can have attributes and can contain other elements)