Type names are Qualified Names, which are made of a namespace and of a local name. Local names must be unique in a namespace, but not across namespaces -- like in C++ or Java. Qualified Names have the following string representation: "Q{<namespace>}<local name>". For example: "Q{http://www.example.com/types}small-integer"

For convenience, Namespaces that are imported can be bound to prefixes in the containing Schema Document, and the prefix can be used as a shortcut to the full namespace like so: "<prefix>:<local name>". If the prefix "my" is bound to the Namespace "http://www.example.com/types" in the Schema Document, the above example can also be represented as "my:small-integer".

Builtin Type names are special in that they are in no Namespace and can also be represented with no prefix : "integer".