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Elements in XML Schema represent an instance of an element in an XML document generated
from the schema. The most basic element consists of a single element element. Like the element element used to define
the members of a complex type, they have three attributes:
name — A required attribute that specifies the name of
the element as it appears in an XML document.
type — Specifies the type of the element. The type can be
any XML Schema primitive type or any named complex type defined in the contract. This
attribute can be omitted if the type has an in-line definition.
nillable — Specifies whether an element can be omitted from a
document entirely. If nillable is set to true, the element can be omitted from any document generated
using the schema.
An element can also have an in-line type definition. In-line types
are specified using either a complexType element or a simpleType element. Once you specify if the type of data is complex or
simple, you can define any type of data needed using the tools available for each type of
data. In-line type definitions are discouraged because they are not reusable.
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