xs:unique

Defines that an element or an attribute value must be unique within the scope. See more info at http://www.w3.org/TR/xmlschema11-1/#element-unique.

xs:unique properties
Property Name Description Possible Values
Name The unique name. Always required. Any NCName.
ID The component id. Any ID.
Component The edited component name. Not editable property.
Namespace The component namespace. Not editable property.
System ID The component system id. Not editable property.